I didn't know the Gen 4 LS motors had such bad blow-by and carbon problems until recently. 2011 GMC Yukon with LC9 and 190k miles. I cleaned the orifice in the valve cover and I disabled the AFM (V4 mode). I heard the root problem was a bad design on the rings. The intake had been getting a quart of oil blown into it every few hundred miles, and I didn't know until it was too late. I installed a 10 ounce capacity catch can, and it filled up after 50 miles of highway driving at 70-75 mph. I now run the catch can 'out' line to open air and plugged the line going to the intake. Doing my part for global warming. Without vacuum sucking all that oil out, the catch can barely gets any oil in it; oil consumption has gone down a lot. Everything was carbonized. I put in new plugs too. The old ones had carbon on them. Then I dumped tons of Marvel into the crankcase and fuel tank. It seems to run better, but cold starts still take a little while and are super rich, like blowing raw gas out the exhaust because the injectors are just dumping fuel. It sucks needing a big extended SUV and no one makes them except GM and Ford both of which suck.
Not anymore. Jeep has the big dog now. A grand Cherokee L, wagoneer, and grand wagoneer, or should I say the 120 grand wagoneer. And the grand wagoneer only comes in the 6.4 Hemi
Russell good job. The fix is the non vacuum pcv catch can and cleaning the carbon off. Avoid the marvel mystery oil. Oil in the gas will increase carbon build up.
Makes sure you change the oil after the induction ckeaning. Huge amounts microscopic GDI abrasive soor will contaminate the oil. Takes 2 oil changes to bring it back to normal. I have done oil analysis before and after, it is a huge problem anf full flow filters will catch it.
How does it contaminate the oil if the induction service is in the intake? Not sure how this abrasive material(carbon) would get past the pistol rings.
@@twentyonehertz the microscopic soot will mix with fuel and oil and get into crankcase via normal blow by. If rings are stuck or sticking, even more blowby and oil consumption.
Good video, but I didnt think those valves at 90+ k miles looked that bad. I am referring to the valve seats. The stems looked very bad and that appeared to be where the accumulation mostly was deposited. GM has modified the oil requirements so that the blow by gasses are not as contaminating and re baffled the rocker valve cover to minimize oil carbon residue going back to the intake. I dont think there is a need to reset anything except clearing any codes as the ECM will right itself after running awhile and or restarts. Thanks for sharing this procedure.
Direct injection Into cylinders therefore no fuel wash on backside of valves and seats. Only air passes. Now, here's the deal. In the old days any oil drawn through pcv system into intake was simply washed away by fuel, and burned. No biggie Valves kept reasonably clean. Now we're only drawing air through the intake so when oil is sucked into intake, its gonna carbon the stems backside of intake valves, and EVENTUALLY the valve seats. ...Loss of compression, excessive blowby, bad fuel trim, hurt value guide seals ,etc. This pcv issue was not accounted for when the move to direct injection was made. And it's not only GM. It's any motor with DI. On the GM LT platform, the location of PCV valve is a blunder. 1. It's too low on the engine, and, 2. It's too hot down there. The spring weakens quickly , causing excessive oil draw. 1. Change PCV valve every 20,000 miles. Cheap and easy. 2. Install catch can in pcv line to stop oil from reaching intake manifold. Works like a settling bowl on an old tractor. When you can measure how much oil gets in the can, you'll be able to tell how much oil your engine uses as opposed to getting sucked in through pcv and burned. You might only be using half as much oil as you think you are😉 GOOD LUCK . Ya just cant have oil getting on those valves when there's no fuel wash in that dang port.
Reason why See a lot of Carbon build up back of Valve Fuel Injector is not above the valve anymore high pressure Injection systems Injector is in Combustion Chamber. When Injector was above the Intake Valve all you had to do is Run Couple Bottles Fuel System Cleaner Like Chevron Techron , BG 44k, or Redline Fuel system Cleaner. Those 3 I know works in my 45 years experience Pro Master Mechanic Blaw Blaw. I have not used Lucas. Those cleaners worked good on Old Fuel injection Systems. Cleaned Carbon off Intake Por,t, Valve, Combustion Chamber top of Piston . Also Reduces NOX Gases which is Created by Carbon Build up. Another Important Factor is Good Top Tier Gas if your Buying Costco or Sam Club Gas your not getting High Detergent Gas like Chevron Shell QT Exxon worst Ping Juice . Carbon build up on back of the valve comes from Oil leaking down Valve Guide over time slowly builds up . Also Change Engine oil more this 10 thousand mile Oil Changes have Created more Problems with Crank Case Ventilation Systems Especially on European Cars also I've seen Oil leaks Develop lower Mileage because Oil so far gone doesn't lube Rubber seals Crystalize s Gaskets. When I drain Engine oil has 10 k miles on it very Toxic Fumes HydroCarbons build up Pull plug let it drain leave area till done draining. Back to Carbon Build Up way to clean with out removing Intake manifold Induction Cleaning Inducing Cleaning Chemical in Intake manifold with Special Tools Adapters that procedure is not new been around for 30 years more important to do Induction Cleaning Service because of High Pressure Injector Systems GDI etc BG has Special tools sell to Dealers and Independent Shops. I came up with my own Set up works Very Good .
I bought a 2018 recently, not knowing about the direct injection change from the earlier silverados, and the truck lags while accelerating. I've used valve cleaner in the intake but it only works slightly. I'm gonna have to do this next...
@@vinnieortega The 2014-18 have throttle lag because of the way the powertrain was tuned on them. what you are feeling has nothing to do with intake carbon. your best option is a tune or one of those jnk pedal commanders.
@@karlschauff7989 really... I even put the fuel management delete on it to stop from going down to 4 cylinders and it still lags. What tuner would you suggest?
These trucks are trash i have a 2014 sierra 5.3 153k already misfiring last modern gm product for me no more i paid. 43 k for it not worth it yeah theyre nice good looking trucks but the gdi stuff is garbage
@@felipealvarez892 did you figure out your misfire cause? I too have the same issue on a 2014 Silverado 150k mil. Misfire cylinder 1. I did everything I could, spark plugs wires and coil. I was dreading lifters, but just ruled those out. Left with injectors or carbon buildup on valves.
what was the customer complaints mine is the car shuddered when accelerated and ive notice all this carbon up build inside the intake gunk up on the valve seats
I appreciate the video on the manual cleaning. Doing a fuel induction service will do absolutely nothing to clean the intake port. Direct injection means the fuel is injected directly into the cylinder. At no point will fuel ever touch the port or the top of the intake valves.
Fuel induction service doesn’t mean the solution is sent through the fuel system. The induction service is performed by introducing a chemical solution through the intake, meaning it has to pass over the intake valves. You’d be suprised at some of the higher end treatments, they help..but only if used regularly.
Appreciate your effort so much It is one of the toughest jobs that I ever done I am tall and bending so long to clean caused a terrible back pane some time and nee at other times. With all of these crying at night hot and cold. I can tell you differently need some strong chemical disolver to get high rate of cleaning along with the mechanical cleaning. You are not going to clean all. But you like it for sure. Wish you the best
Guys I need help. I've got a sierra with an LR4 with 114k miles and it keeps throwing p0332 for the knock sensor. Had the sensor and sensor harness replaced and it's still throwing the code. Think I need a carbon clean or did I get shafted by my mechanic? I drive this engine pretty hard but before I had it my dad and brother used it as a town car. Everything else on the truck is mint for an 04 and this check engine light is starting to piss me off
Get a real scanner on it to run a misfire counter. If there’s no misfire data and the computer is still picking up knock.. Do a compression test on the cylinders, or just jump straight to the borescope to inspect for carbon buildup on the top of the pistons, if you don’t see any and compression is good, then I would pull the intake manifold and inspect for carboned up valves. Sometimes bringing to a technician (instead of a mechainc) can be helpful.
After removing plugs Can this ac delco product be added to a v-6 with a 1/2 oz added across piston tops to soak down in over x days to “free “piston oil rings ??? And then drain and refill and live each cylinder with oil before restart ? Verses the common go to. : sea foam ?
The AC Delco Tip Ens cleaner is a very robust cleaner, max detergents. Lubrizol, a major additive manufacturer makes it. Most if these aftermarket cleaners are 50-80 cheap oil as a filler with small amounts of solvents. Worthless. ACD is less than 5% oil, 95% cleaner, which is why it works and costs 3x.
Worst he's seen.. huh? That looks good for 90k miles! Tell me you've never worked on an Audi or Bmw without telling me you've never worked on an Audi or Bmw !
Got me there lol. Was one of my first dozen times with carbon on a GM product. I’ve done my fair share of walnut blasts to European products. This shop didn’t even have the equipment for it 😂
Exactly. I don't think it's as big as a problem as the Ford's were having or we would see more videos on it. Not to say Gm engines don't have their issues.
Great video but I'd like to ask one question buy using the type pliers You still take a chance on nicking Valve stems and may damage valve guides Im Also from MN I know a couple of gm techs That use a small dingle ball hone in the upper part of the port . Again good explanation in video
Hey good to hear from ya! Risk is definitely there, however if the valve is shut and you stay away from the top 1/8” of the stem all is fine. Definitely looking to invest more in valve cleaning tools and well!
Are fuel injectors and intake valves a whole different thing ???? My 2015 Silverado it shakes when at idle and when I step on the gas all at once it hesitates what could be the problem ?
Did you ever figure out what's wrong? Sounds like a misfire but my 2004 is doing the same thing. I'm doing a complete tuneup and fixing the knock sensors.. and my intake ports and valves are worse than this video..
Preventing is not an option sadly. Slowing the process down can be done with catch can installation, higher quality fuels, and driving it hard at least once in awhile.
Not a huge problem, won’t hurt the cylinder after the cleaner has softened it up, but you want to have some regard for the catalytic converter assembly, they don’t like carbon chunks entering their core.
No. These are direct inject engines. Gas does not enter the intake and mix with air and pass thru the valves. Gas is what keeps them clean. Direct Inject injects gas directly into the cylinder.
never had that problem back in the 60' s with the 283 ,327 ,427 , 409 , they had no PCV , no EGR , no Ethanol gas , I still drive a 1991 GMC 1500 with 300.000 miles on it deleted the EGR and PCV system at year 2 , oil was changed every 4000 miles here is what it looks like now ,after an restoration in Canada ruclips.net/video/-BDUuHcDqW4/видео.html
never had that issue because port injection cleaned off the backs of the valves with fuel. modern, direct injected engines spray fuel directly into the combustion chamber so it never touches the valves which is why they get so gummed up
Wouldn't have mattered in the 60's, you needed a head job well before 90k if you were running any sort of compression. My 396 always burned valves around 30k miles
If only GM would stop being cheap & lazy and switch to dual injection like Ford, Toyota, and Hyundai/Kia are doing. Adding port injection to all their GDI engines would be as simple as simply making provision for it in a redesigned intake manifold.
It's just labor mostly, so whatever the shop/hour is. Dealerships are like $160 sometimes, some places $130. Figure 3 or 4 hours. I'd set aside at least $500 bucks.
Catch can separate the contaminated oil from the blow-by exhaust gases before being recycled back into the intake to be re-burned. A catch can will not prevent Carbon build-up it will only reduce it. Carbon build-up is a problem with all GDI engines.
GDI sucks ! should of stayed with port fi. Customers paying thousands for this is unbelievable ! Its making electric vehicles more attractive all the time !
Manufactures can design engines that don’t have this problem if they wanted to. Toyota Lexus and Ford have done this. Better off with a Lincoln Navigator over this GM junk.
I didn't know the Gen 4 LS motors had such bad blow-by and carbon problems until recently. 2011 GMC Yukon with LC9 and 190k miles. I cleaned the orifice in the valve cover and I disabled the AFM (V4 mode). I heard the root problem was a bad design on the rings. The intake had been getting a quart of oil blown into it every few hundred miles, and I didn't know until it was too late. I installed a 10 ounce capacity catch can, and it filled up after 50 miles of highway driving at 70-75 mph. I now run the catch can 'out' line to open air and plugged the line going to the intake. Doing my part for global warming. Without vacuum sucking all that oil out, the catch can barely gets any oil in it; oil consumption has gone down a lot. Everything was carbonized. I put in new plugs too. The old ones had carbon on them. Then I dumped tons of Marvel into the crankcase and fuel tank. It seems to run better, but cold starts still take a little while and are super rich, like blowing raw gas out the exhaust because the injectors are just dumping fuel. It sucks needing a big extended SUV and no one makes them except GM and Ford both of which suck.
Not anymore. Jeep has the big dog now. A grand Cherokee L, wagoneer, and grand wagoneer, or should I say the 120 grand wagoneer. And the grand wagoneer only comes in the 6.4 Hemi
they have had bad blow by since 1997 with the intro of the LS
Russell good job. The fix is the non vacuum pcv catch can and cleaning the carbon off. Avoid the marvel mystery oil. Oil in the gas will increase carbon build up.
I'm new to these AFM models. How did you disable the V4 mode??
Hey. Do you have a link to the oil catch can did you use?
Makes sure you change the oil after the induction ckeaning. Huge amounts microscopic GDI abrasive soor will contaminate the oil. Takes 2 oil changes to bring it back to normal. I have done oil analysis before and after, it is a huge problem anf full flow filters will catch it.
will NOT catch it
How does it contaminate the oil if the induction service is in the intake? Not sure how this abrasive material(carbon) would get past the pistol rings.
@@twentyonehertz the microscopic soot will mix with fuel and oil and get into crankcase via normal blow by. If rings are stuck or sticking, even more blowby and oil consumption.
Lol, carbon build up, what carbon build up? Audi-“hold my beer”
😂
Good video, but I didnt think those valves at 90+ k miles looked that bad. I am referring to the valve seats. The stems looked very bad and that appeared to be where the accumulation mostly was deposited. GM has modified the oil requirements so that the blow by gasses are not as contaminating and re baffled the rocker valve cover to minimize oil carbon residue going back to the intake. I dont think there is a need to reset anything except clearing any codes as the ECM will right itself after running awhile and or restarts. Thanks for sharing this procedure.
Direct injection Into cylinders therefore no fuel wash on backside of valves and seats. Only air passes. Now, here's the deal. In the old days any oil drawn through pcv system into intake was simply washed away by fuel, and burned. No biggie Valves kept reasonably clean. Now we're only drawing air through the intake so when oil is sucked into intake, its gonna carbon the stems backside of intake valves, and EVENTUALLY the valve seats. ...Loss of compression, excessive blowby, bad fuel trim, hurt value guide seals ,etc. This pcv issue was not accounted for when the move to direct injection was made. And it's not only GM. It's any motor with DI. On the GM LT platform, the location of PCV valve is a blunder. 1. It's too low on the engine, and, 2. It's too hot down there. The spring weakens quickly , causing excessive oil draw. 1. Change PCV valve every 20,000 miles. Cheap and easy. 2. Install catch can in pcv line to stop oil from reaching intake manifold. Works like a settling bowl on an old tractor. When you can measure how much oil gets in the can, you'll be able to tell how much oil your engine uses as opposed to getting sucked in through pcv and burned. You might only be using half as much oil as you think you are😉 GOOD LUCK . Ya just cant have oil getting on those valves when there's no fuel wash in that dang port.
Reason why See a lot of Carbon build up back of Valve Fuel Injector is not above the valve anymore high pressure Injection systems Injector is in Combustion Chamber. When Injector was above the Intake Valve all you had to do is Run Couple Bottles Fuel System Cleaner Like Chevron Techron , BG 44k, or Redline Fuel system Cleaner. Those 3 I know works in my 45 years experience Pro Master Mechanic Blaw Blaw. I have not used Lucas. Those cleaners worked good on Old Fuel injection Systems. Cleaned Carbon off Intake Por,t, Valve, Combustion Chamber top of Piston . Also Reduces NOX Gases which is Created by Carbon Build up. Another Important Factor is Good Top Tier Gas if your Buying Costco or Sam Club Gas your not getting High Detergent Gas like Chevron Shell QT Exxon worst Ping Juice . Carbon build up on back of the valve comes from Oil leaking down Valve Guide over time slowly builds up . Also Change Engine oil more this 10 thousand mile Oil Changes have Created more Problems with Crank Case Ventilation Systems Especially on European Cars also I've seen Oil leaks Develop lower Mileage because Oil so far gone doesn't lube Rubber seals Crystalize s Gaskets. When I drain Engine oil has 10 k miles on it very Toxic Fumes HydroCarbons build up Pull plug let it drain leave area till done draining. Back to Carbon Build Up way to clean with out removing Intake manifold Induction Cleaning Inducing Cleaning Chemical in Intake manifold with Special Tools Adapters that procedure is not new been around for 30 years more important to do Induction Cleaning Service because of High Pressure Injector Systems GDI etc BG has Special tools sell to Dealers and Independent Shops. I came up with my own Set up works Very Good .
I heard there's a fix to this.
It's called a wet shot of NO2!
Good video! I have seen carbon build up just as bad if not worse on some of the 5.3/6.2 at 25k. Pretty sad how bad they can get.
I bought a 2018 recently, not knowing about the direct injection change from the earlier silverados, and the truck lags while accelerating. I've used valve cleaner in the intake but it only works slightly. I'm gonna have to do this next...
@@vinnieortega The 2014-18 have throttle lag because of the way the powertrain was tuned on them. what you are feeling has nothing to do with intake carbon. your best option is a tune or one of those jnk pedal commanders.
@@karlschauff7989 really... I even put the fuel management delete on it to stop from going down to 4 cylinders and it still lags. What tuner would you suggest?
Must do every year imo
.. induction service, manual cleaning and fuel system cleaning.... Run premium if possible and a catch can
These trucks are trash i have a 2014 sierra 5.3 153k already misfiring last modern gm product for me no more i paid. 43 k for it not worth it yeah theyre nice good looking trucks but the gdi stuff is garbage
@@felipealvarez892 did you figure out your misfire cause? I too have the same issue on a 2014 Silverado 150k mil. Misfire cylinder 1. I did everything I could, spark plugs wires and coil. I was dreading lifters, but just ruled those out. Left with injectors or carbon buildup on valves.
what was the customer complaints
mine is the car shuddered when accelerated and ive notice all this carbon up build inside the intake gunk up on the valve seats
I appreciate the video on the manual cleaning.
Doing a fuel induction service will do absolutely nothing to clean the intake port. Direct injection means the fuel is injected directly into the cylinder. At no point will fuel ever touch the port or the top of the intake valves.
Fuel induction service doesn’t mean the solution is sent through the fuel system. The induction service is performed by introducing a chemical solution through the intake, meaning it has to pass over the intake valves. You’d be suprised at some of the higher end treatments, they help..but only if used regularly.
Is there a way you can close the valves manually???
Appreciate your effort so much
It is one of the toughest jobs that I ever done
I am tall and bending so long to clean caused a terrible back pane some time and nee at other times.
With all of these crying at night hot and cold. I can tell you differently need some strong chemical disolver to get high rate of cleaning along with the mechanical cleaning. You are not going to clean all. But you like it for sure.
Wish you the best
Guys I need help. I've got a sierra with an LR4 with 114k miles and it keeps throwing p0332 for the knock sensor. Had the sensor and sensor harness replaced and it's still throwing the code. Think I need a carbon clean or did I get shafted by my mechanic? I drive this engine pretty hard but before I had it my dad and brother used it as a town car. Everything else on the truck is mint for an 04 and this check engine light is starting to piss me off
Get a real scanner on it to run a misfire counter. If there’s no misfire data and the computer is still picking up knock.. Do a compression test on the cylinders, or just jump straight to the borescope to inspect for carbon buildup on the top of the pistons, if you don’t see any and compression is good, then I would pull the intake manifold and inspect for carboned up valves. Sometimes bringing to a technician (instead of a mechainc) can be helpful.
After removing plugs
Can this ac delco product be added to a v-6 with a 1/2 oz added across piston tops to soak down in over x days to “free “piston oil rings ???
And then drain and refill and live each cylinder with oil before restart ?
Verses the common go to. : sea foam ?
Absolutely!
The AC Delco Tip Ens cleaner is a very robust cleaner, max detergents. Lubrizol, a major additive manufacturer makes it. Most if these aftermarket cleaners are 50-80 cheap oil as a filler with small amounts of solvents. Worthless. ACD is less than 5% oil, 95% cleaner, which is why it works and costs 3x.
What does this service cost
Hi , i like your video ... wat year and how many miles it has that truck? I have to do mine .. its a ext 07 with 154 k miles
Your 07 is not GDI. This was a 2014 with 109k miles!
@@Pete_Tech_ wats GDI ?
Worst he's seen.. huh? That looks good for 90k miles! Tell me you've never worked on an Audi or Bmw without telling me you've never worked on an Audi or Bmw !
Got me there lol. Was one of my first dozen times with carbon on a GM product. I’ve done my fair share of walnut blasts to European products. This shop didn’t even have the equipment for it 😂
Truth
If you own a VW you already know you will need to buy a manifold from carbon build up
@Pete_Tech_ wonder if running 93 octane and a catch can will help??
what are your thoughts on a oil catch can good bad 2021 6.2 motor chevy
Only way to go. Pcv is flawed now because of Di. Catch can stops oil from pcv vent from reaching intake.
Is this a non-problem for gen 3 5.3's?
Got a 2017 5.3 reading code p050d with only 46k miles. Would the carbon build up be a cause for this code?
Yes. Probably your fuel injectors
This why got rid of my 2015 Stingray
That doesn't look bad compared to other DGI engines from other companies.
Exactly. I don't think it's as big as a problem as the Ford's were having or we would see more videos on it. Not to say Gm engines don't have their issues.
Great video but I'd like to ask one question buy using the type pliers
You still take a chance on nicking Valve stems and may damage valve guides
Im Also from MN I know a couple of gm techs That use a small dingle ball hone in the upper part of the port .
Again good explanation in video
Hey good to hear from ya! Risk is definitely there, however if the valve is shut and you stay away from the top 1/8” of the stem all is fine. Definitely looking to invest more in valve cleaning tools and well!
Brother I have problem with gmc 2017 Yukon dtc p0175, p0172 high mileage fuel trim -35 both bank possible intake carbon? Both fuel pump good ,
Yes, if over 100k miles. Most likely carboned up bad!
Those codes can also be caused by a high pressure fuel pump, that was my problem in my 2015.
Are fuel injectors and intake valves a whole different thing ???? My 2015 Silverado it shakes when at idle and when I step on the gas all at once it hesitates what could be the problem ?
Did you ever figure out what's wrong? Sounds like a misfire but my 2004 is doing the same thing. I'm doing a complete tuneup and fixing the knock sensors.. and my intake ports and valves are worse than this video..
Would walnut blasting be an option?
It’s a far superior option! The shop I was working at that time, didn’t have one!
what code was the car throwing before the clean up?
Scratching the Cadillac Escalade off my list.
dry ice blaster?
Is the cause of this from PCV back into the intake??
No, the cause is GDI. No fuel washing the injectors like the older generations. Happens to almost all GDI engines.
I'm doing my 94 jeep xj head gasket with 230kish miles and it's not even that bad
So what can we do as a driver to prevent carbon build up in the first place ?
Preventing is not an option sadly. Slowing the process down can be done with catch can installation, higher quality fuels, and driving it hard at least once in awhile.
Install a catch can. Only need 87 octane due to the 5.3 engines low compression. And these are LT engines, not LS.
How did you rotate the valves to make sure they were at tdc?
He said that
what happens if chunks got into engine with the GDI cleaner?
Not a huge problem, won’t hurt the cylinder after the cleaner has softened it up, but you want to have some regard for the catalytic converter assembly, they don’t like carbon chunks entering their core.
Would running fast for 2.5 hrs on 91 octane straight on a freeway clean it up?
Not at all sadly.
No. These are direct inject engines. Gas does not enter the intake and mix with air and pass thru the valves. Gas is what keeps them clean. Direct Inject injects gas directly into the cylinder.
Will an oil catch can prevent this from happening?
Not prevent, but absolutely slow the process down!
where can i purchase the vaccum adapter for chevrolet LS heads??
Just gotta make one out bulk hose or buy a walnut blaster setup!
Theres no reason to change oil after air induction cleaning correct?
Not necessarily. If you think about it, the cleaner for the valves & in the cylinders shouldn’t have much affect on the engine oil.
I dunno if you need to but I hear it recommended from several others.
These direct inject 5.3 engines are not LS, they are LT engines. From what i hear, they can produce more power than a LS, but it costs a lot more $.
Planned obsolescence version 5.3
This is not a LS based engine. This is a newer ecotec engine with direct injection
It’s a LT
What was the clients complaint that led to this repair ? Never mind... I looked at the video all the way. :-) Great vid
There has to always be something with every car!!! Will a catch can help??
Not as dramatically as people think it will help. It does slow the process down definitely but the car buildup is guaranteed.
@Pete_Tech_ A QUALITY c.c. setup WITH the clean side separator will make a HUGE difference on GM LT engines... wth are you on about ??
never had that problem back in the 60' s with the 283 ,327 ,427 , 409 , they had no PCV , no EGR , no Ethanol gas , I still drive a 1991 GMC 1500 with 300.000 miles on it deleted the EGR and PCV system at year 2 , oil was changed every 4000 miles here is what it looks like now ,after an restoration in Canada ruclips.net/video/-BDUuHcDqW4/видео.html
never had that issue because port injection cleaned off the backs of the valves with fuel. modern, direct injected engines spray fuel directly into the combustion chamber so it never touches the valves which is why they get so gummed up
those engines also had other problems plus terrible MPG and weak HP/TQ compared to these engines
Wouldn't have mattered in the 60's, you needed a head job well before 90k if you were running any sort of compression. My 396 always burned valves around 30k miles
Catch can helps
If only GM would stop being cheap & lazy and switch to dual injection like Ford, Toyota, and Hyundai/Kia are doing. Adding port injection to all their GDI engines would be as simple as simply making provision for it in a redesigned intake manifold.
Boy you certainly did a lot of scratching in there and didn’t necessarily get all the carbon!
What does it cost to have this done ? At least a round about cost.
It's just labor mostly, so whatever the shop/hour is. Dealerships are like $160 sometimes, some places $130. Figure 3 or 4 hours. I'd set aside at least $500 bucks.
Is this the same truck that had p0172 p0175?
After clean it the intake ports
Yessss!
No even that bad, look at a bmw N54 engine with 150k lol I’ve walnut blasted on those engines, build up was 2-3x worse
Came here to say the same thing. Dude must have never done carbon cleaning on a European vehicle.
That’s because they don’t last that long
There go your gas savings 😂
You should see a mini cooper engine with 115k miles on it. Way way way worse.
This buildup doesn't look that bad. I've seen buildup that's 10 times worse at half the mileage on Toyota and VW group engines.
Correct!
Does this happen to people who do not drive the truck hard or do not get out on the interstate and drive it at high speed? Thanks for any info.
Forgot to response my bad. Yes it absolutely does.
@@Pete_Tech_ Crazy. We have a 2017 with 71,088 miles and this has happened. Thanks for responding.
That's not even bad, should take a look at the europeans
I threw a catch can on my 6.2
Catch can separate the contaminated oil from the blow-by exhaust gases before being recycled back into the intake to be re-burned. A catch can will not prevent Carbon build-up it will only reduce it. Carbon build-up is a problem with all GDI engines.
One word: pipe cleaners
Only walnut blasting now 😂
GDI sucks ! should of stayed with port fi. Customers paying thousands for this is unbelievable ! Its making electric vehicles more attractive all the time !
Manufactures can design engines that don’t have this problem if they wanted to. Toyota Lexus and Ford have done this. Better off with a Lincoln Navigator over this GM junk.
HEMI