My question is how would a lifter noise get quiet when removing ignition from the equation? Lifter noise is mechanical and should always be there as long as the engine is turning fast enough which in your case it was
Without spark to the fuel you only have compression of the cylinder capacity. When ignited the gasoline expands 8:1 putting more force on the valves. Similarly if you remove spark plugs individually and rotate a motor from the crank- the more plugs removed the easier the motor spins.
Just remove the valve cover and start the engine. Not very messy at all like one would assume. Watch and see which lifter isnt keeping up with the others
You can put a dial indicator on the top of the push rod and then manually turn the engine over, that will check the total lift of each cam lobe/lifter/push rod, from there you can see what cylinder is different, then measuring your lifter and push rod against your known good ones will tell you if you wiped out a cam lobe or not
Man what a bummer.. I heard somewhere that modern engine oil is not compatible with flatt tappet cams. The oil no longer contains the zinc molecules that protect the surfaces from wear.. Looks like you are going to have to pull the motor and go through the rotating assembly.. I would recommend roller cam going back together.. The Pitbull is one sick whip that has come a long way..
check for a root cause, lack of maintenance, oil pressure concern, overheated, etc. in my experience (Ford technician) piston slap is more of a bell like noise heard on the bottom end (due to the piston being shaped like a bell), good job finding it. make sure you're oil change intervals are being done, I see a lot of catastrophic engine damage due to that one small detail.
harbor freight has a stethoscope for $5. .. I have been running a reman 351w from autozone for 8 years now with no issues.. came with a 36k mile /36 month warranty .. lol
Pulling the plug cable to # 4 and having it quiet down could point to a bad rod bearing. Not too hard to drop the pan and check it (been there, done that). The galled lifter might be a manufacturing issue (I've heard comp cams has had quality control issues), improper cam break in, lack of zinc in today's oils. In any event, you probably have had debris from the jacked up lifter circulating through your motor. I would maybe drop all the rod bearing caps to check for Journal scoring or imbeded trash in the bearings. Check the mains while you're down there as well.
It seems at some point a vacuum gage connected to manifold vacuum and monitored while connecting disconnecting cyl 4 would lead you to valve train problem and not the lower end. But be prepared to find more wrong than just the failed cam and lifter. I bet you find some metal embedded in the bearings. That’s a lot of metal from the cam and lifter. At least check the Oil filter for metal . Comments about modern oil are correct. The lack of zinc and phosphorus can cause cam and lifter to fail.
5.0 swap brotha. 😂 or 5.3… Sorry to see your engine go like that… But I don’t feel so bad seeing how your brother russell always teased me when i blew my Jeep motor 🤪
I always pick Jay’s brain at every event…..Check the total lift will dial indicator. Compare against cam specs…will also show a wiped lobe on the cam. Blue print engine…..comes with warranty…roller cam….easy pesy. Still….that sucks. Never cheap…never fun.
Good video, I've got about the same problem and I'll follow pretty much what you did, thanks
My question is how would a lifter noise get quiet when removing ignition from the equation? Lifter noise is mechanical and should always be there as long as the engine is turning fast enough which in your case it was
my thinking exactly
Without spark to the fuel you only have compression of the cylinder capacity. When ignited the gasoline expands 8:1 putting more force on the valves. Similarly if you remove spark plugs individually and rotate a motor from the crank- the more plugs removed the easier the motor spins.
Just remove the valve cover and start the engine. Not very messy at all like one would assume. Watch and see which lifter isnt keeping up with the others
You can put a dial indicator on the top of the push rod and then manually turn the engine over, that will check the total lift of each cam lobe/lifter/push rod, from there you can see what cylinder is different, then measuring your lifter and push rod against your known good ones will tell you if you wiped out a cam lobe or not
Ahh, I like it. Because every push rod/lifter should have relatively the same amount of travel?
Man what a bummer.. I heard somewhere that modern engine oil is not compatible with flatt tappet cams. The oil no longer contains the zinc molecules that protect the surfaces from wear..
Looks like you are going to have to pull the motor and go through the rotating assembly..
I would recommend roller cam going back together..
The Pitbull is one sick whip that has come a long way..
Yeah, that's where I'm at is trying to find a good set of roller lifters.
check for a root cause, lack of maintenance, oil pressure concern, overheated, etc. in my experience (Ford technician) piston slap is more of a bell like noise heard on the bottom end (due to the piston being shaped like a bell), good job finding it. make sure you're oil change intervals are being done, I see a lot of catastrophic engine damage due to that one small detail.
Yeah, I think the lifter failed after my last oil change. Such a bummer bit gives a good lesson to learn.
harbor freight has a stethoscope for $5. .. I have been running a reman 351w from autozone for 8 years now with no issues.. came with a 36k mile /36 month warranty .. lol
Stock = Reliable
I run 351w also bored 30 Over. mild cam and Holley sniper. Zero issues! Drove from Chicago to the rubicon trail.
Pulling the plug cable to # 4 and having it quiet down could point to a bad rod bearing.
Not too hard to drop the pan and check it (been there, done that).
The galled lifter might be a manufacturing issue (I've heard comp cams has had quality control issues), improper cam break in, lack of zinc in today's oils.
In any event, you probably have had debris from the jacked up lifter circulating through your motor.
I would maybe drop all the rod bearing caps to check for Journal scoring or imbeded trash in the bearings.
Check the mains while you're down there as well.
Yeah, I'm definitely going to have to pull the motor apart and take a look. Thanks for the tips!
I’m 4 min in and my thought it broken valve spring that is hanging a valve open with probable piston collision
Seems like a perfect time to put in a hydraulic roller cam 😁
Gotta love when opportunities present themselves haha
Time to make it a roller, (should have done that the first time anyway)
Yeah that's what I'm learning haha
Great step by step video, very informative. Keep up the good work!
Thanks, will do!
It seems at some point a vacuum gage connected to manifold vacuum and monitored while connecting disconnecting cyl 4 would lead you to valve train problem and not the lower end. But be prepared to find more wrong than just the failed cam and lifter. I bet you find some metal embedded in the bearings. That’s a lot of metal from the cam and lifter. At least check the Oil filter for metal . Comments about modern oil are correct. The lack of zinc and phosphorus can cause cam and lifter to fail.
Yeah I think I'm going to have to pull the engine apart again, unfortunately.
Also the noise you heard was likely exhaust leaving through the intake because the exhaust valve doesn’t open
5.0 swap brotha. 😂 or 5.3…
Sorry to see your engine go like that…
But I don’t feel so bad seeing how your brother russell always teased me when i blew my Jeep motor 🤪
Ahh that guy! lol definitely need to kick around and see what to do next.
I always pick Jay’s brain at every event…..Check the total lift will dial indicator. Compare against cam specs…will also show a wiped lobe on the cam. Blue print engine…..comes with warranty…roller cam….easy pesy. Still….that sucks. Never cheap…never fun.
Yeah definitely having a blast with this thing! haha
Rip it apart. You will never no until you do. Or start it up and hold to the skinny pedal to the floor until it tells you the problem. He he
haha that would be one way. At this point, with all the feedback, I'm definitely going to check everything out.
Sorry about your motor.
👊 ρгό𝔪σŞｍ