Toyota/Lexus A25A-FKS Teardown… It’s COMPLETELY SEIZED! Will this become a Common Problem?
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- Опубликовано: 8 сен 2024
- This is Toyota's newest 4cyl. The codename for the engine is otherwise known as the 25A-FKS. The A25A-FKS is a very popular engine and can be found in the Toyota Camry, Toyota Sienna, Toyota Avalon, Toyota Highlander, Toyota Rav4, Toyota Venza, and many MANY other Lexus applications. The A25A replaced the legendary 2AR-FE, and all of the applications the 2AR was utilized in. This engine was originally featured around 2017-2018. It features Toyotas D4S fuel injection system, that integrates port, and direct injection. When this engine was originally released, it was regarded as one of the most thermally efficient engines ever. There appears to have been a few revisions to these engines over the years. There are multiple variants that are utilized in both Toyota and Lexus Applications. This engine, and its other variants are generally regarded as being very reliable and are not plagued with many issues... Normally... In this video, you will see what will happen if you don't replace your WATER PUMP and keep driving!!! It is very possible this engine saw temperatures north of 300F before completely locking up. Checking you instrument cluster briefly while driving could have likely avoided this failure.
This is not normal content for the channel, but I hope you enjoy it!
If you like what you saw, leave a thumbs up and subscribe! I will gladly look for other cheap engines to tear down!
12mm Socket You SHOULD GET BEFORE TEARDOWN
amzn.to/3Z4IAHA
On Toyota forums the electric A25A water pump has been failing all over the place at between 50,000-130,000 miles. Ditto the electric thermostat and coolant by-pass valve. Bottom line: the electrified cooling system of the A25A is its Achilles heel. The rest of the motor has lasted up to 502,000 miles with 4,000 mile engine oil changes. Owners need to occasionally scan the temperature gauge and be ready to call a tow truck BEFORE the gauge gets up into the RED zone.
I totally agree, the remainder of the engine appears to be extremely robust. A quick glance at the temp gauge would have prevented this!
which forums?
Maybe Toyota needs to add a bit of software to alert the driver that these parts have failed.
@@Hoggdoc1946 I agree, this can be easily added to the instrument cluster. Anything above 220f it can alarm the driver and request them to pull over.
@@WiseGuyzGarage Wait, does it really not trigger a check engine light and throw a pump code if the pump fails?
A25A-fks tear-downs are hard to come by, great video and thanks for bringing us along!
Absolutely! Thanks for watching! Since it seems a lot of people have enjoyed the video, whenever I see any other Toyota engines local to me for the right price I might do the same thing again!
@@WiseGuyzGarage if you guys get an M20A-FKS to tear down.. that would be awesome. It’s the engine in my 23 Corolla cross.
@@TheSleepyMechanic0524 I’ve been looking for the modern Toyota engines constantly! This is one of them I’ve been keeping an eye out for!
FYI CORRECTION....Great video. I have this engine in my 2020 Camry LE. On page 531 of my Owner's Manual it reads...If your vehicle overheats..."Engine Coolant Temp High...Stop in a Safe Place...See Owners Manual"...is shown on the multi-information display. It makes sense that Toyota will alert the driver if the engine overheats. Afterall...this ain't no YUGO! The MPG on the freeway is unbelievable...between 38 - 40 MPG.I get my Mobil 1 0w-16 at Walmart ($25.00 5 qts.) and use Toyota oil filters. Great car and great engine!
Thanks for this!
I would love to see someone take out temp sensor from the car (and plug in that hole with something, obviously). Then heat up the sensor to higher than typical engine temp and see if there really is a warning in the dash!
@@lightmeupper that is a huge downfall on that system. But then again, an engine is replaceable, and if the car NEEDS to move when the pump fails, then that warrants destroying the engine in that case
YUGO! LOL! I have always changed my own oil but can't find 0-16 in store, but Toyota gives free oil changes/10,00 miles for 2 years I believe so have been taking to dealer. Thx's for info.
I'm so glad that I went with a 2017 Camry instead of a 2020 Camry. You can't convince me a GDi engine which is under more stress and run hotter is more reliable than the tradtional port injected engine in the long run.
Nice job on the video. I am so impressed with Toyota's engine designs. It's no wonder they are so reliable.
Thank you for watching I really appreciate it!
Interesting that the successor to the A25A, the turbocharged T24A-FTS, uses a conventional belt driven mechanical water pump.
Maybe the T24A-FTS had more clearance for one? Not exactly sure. There seems to be plenty of clearance on the A25A. My guess is efficiency, and MPG. Maybe further testing by Toyota revealed this to be an issue as actual road testing data started developing.
I think thats the successor to the v6 engine they put in the highlanders. Not the a25a.
Not sure if the T24A-FTS is a replacement . They still have the A25A in the '25 Camry and as far as know in the Crown also .
"Now I should be able to rotate the crank" proceeds to smash the pistons
I tried everything it would NOT budge lol
the use of an orange fram oil filter says a lot about the type of person maintaining this engine
First thing I noticed
Yall please with these Fram oil filter myths... I've used those things with Mobil 1 synthetic in engines I've put over 300,000 miles on.
Just checked on my 2023 RAV4 LE: It has 1) A coolant temperature gage. 2) A high temp coolant warning light. 3) A warning message will be displayed on the screen if engine is overheating. 4) A warning buzzer will come on if the engine is overheating. I wonder how many of these warning system were on the 2019 car that this engine came out of?
I would assume yes? I’m not exactly sure. It’s a shame either way. It seemed well taken care of otherwise
Why can't the engine shut itself down when it severely overheats or better still, when the ECU detects that the pump is no longer drawing current?
I’m not exactly sure why they don’t have a feature like that to be honest. It’s very unfortunate
@@WiseGuyzGarage Just imagine your in the fast lane of a freeway doing 70 mph when it fails, then the engine shuts off. I'm sure Toyota doesn't want a lot of lawsuits when people get injured or killed when the engine shuts off in traffic to save itself.
@@Hoggdoc1946 the cars entire braking system and steering won’t be affected if the engine was to shut off. I tested it on my 2018 Camry before!!
Thanks for sharing! Always enjoy watching these in-depth teardowns, very well recorded.
@@vanisshen4467 thanks for watching! I really appreciate it!
That’s the engine of my Toyota Rav4Model 2019. Now the odometer is reaches 38,000 miles
Keep up with you regular maintenance and it will last you 15 years or more aside from the water pump failure and coolant bypass valve failure that engine is bulletproof.
Nice video, not a lot of Dynamic force engine video’s online (which is generally a good thing 🙂)
Some small tips. The EGR definately does have something to do with the cooling system, it’s a water cooled EGR.
The ‘sensors’ you’re referring to on the timing cover, are actually the VVTi (electric motor on the intake, oil actuated on the exhaust).
Nice to know for next time, keep up the good work!
Coolant contamination is a problem on my 200K 2018 Camry. The oil comes out blackish red. It’s that 0W-16 viscosity that helps it not seize. But it’s a massive problem in colder weather cause so much dry starting occurs :(
My Camrys still driving with that same scorched piston problem. Metal bits come out of each and every oil change. I put a 10K filter on and replace the oil at 5K or before a 10+ hour road trip of 65-70 MPH driving.
That engine you teared down had to have come off of a LE or SE cause the dedicated eco mode on the XLE and XSE helps with that overheating wear and tear. It puts less stress on the water pump!!
My 2022 Venza has a A25A-FXS hybrid version . Glad to see a tear down of this engine . Mine has no serp belt for alt or ac , as they are electric driven . And no place for a starter either.
Toyota does hybrids very very well. In all honesty, if you just keep an eye on the temp every once in a blue moon to check on it, this thing can easily go 4-500k miles. The inside of this engine looks brand new.
Thanks for watching, and sharing!
@@WiseGuyzGarage Sometime I do worry about the electronics in this car . And the fact the engine stops and starts sooo often . I have 30,000 now and it works flawlessly with no oil consumption. I do 5000-6000 mile oil changes. Thanks again
@@zonie70 I wouldn’t be too concerned about the start/stop. Toyota coats the bearings in order to prevent dry startup wear on the engine for that exact reason!
I have a 2023 Venza and when I looked over the engine, I was baffled that I couldn’t locate the belts, I thought I was losing my mind for a sec, then I later found out everything you mentioned lol
@@MikeHamManhybrids don’t have lots of items to maintain or replace
I mean yeah, if owner was driving with failed water pump after getting check engine light - this is certain outcome. That been said I think this is a first water pump I ever saw on A25A-FKS to ever fail. I think owner should buy a lottery ticket, he might win fortune.
no these water pumps are starting to fail I just changed mine this week
That’s why there called idiot lights they don’t pay attention to them.
How many miles?
I have a 2024 Rav4. I was changing the oil today after a drive (which i usually do to better drain the oil). I have noticed that the oil and engine are MUCH hotter than previous engines I've changed oil on. My 2020 Tundra and 2018 Rogue would be hot during a change but the RAV4 is scalding hot to the touch. For some reason it runs very hot
That is really good you were able to notice this honestly. The newer cars do indeed run hotter for better efficiency. They went with the electric water pump because they could control the engine heat more efficiently. I'm not sure what the spec is, but I can assure you it's likely hot. lol Thanks for watching!
This engine has an engine oil heat exchanger and the oil never gets above 200F. This engine actually runs very cool.
I’ve never heard of a problem with the Electrical water pump ever!on A25A.
That’s what I’ve heard as well! Although it doesn’t seem to be common at the moment, I have a few friends who work at Toyota dealerships and they are running into them failing more often. The bearings get seized on the motor and the motor fails completely. There is an issue with the motor in the Toyota corollas M20A engine variant with the electric water pump as well. Hopefully it’s not super common, as the rest of the motor appears to be very well overbuilt. Thanks for watching!
Good video; thanks. Should I wait to buy a new 2025 Sienna?
I wouldn’t wait just because of this. The engine seems very reliable otherwise. Just don’t drive it if it says on the instrument cluster that the engine is overheating!
In europe we run 5w30 on those engines in the rav4 and is300h. We also have the corolla 2.0 m20a fks engine also runs on 5w30 as of recommended by the toyota importers.
That black stuff on top of the piston is either carbon or more likely because of the situation intake plenum plastic The plastic will start to melt after about 400° so this thing got hot real hot wouldn't be the first time I've seen plastic on a Toyota melt from overheating
I agree, it was extremely hot and by far the worst smelling engine I’ve ever torn down! lol thanks for watching!
3:01 that’s an EGR cooler
@@steelio5 yeah I figured out after lmao
Would it be too much to ask, if water pump flowrate vs temp, was realtime measured? Probably cost too much....
I unfortunately do not own or have access to that level of testing equipment
Also in Latin America they say to use 5w-30. Wonder why?
@@davidleiva1347 Not exactly sure why, I’m assuming it’s due to emissions standards in the US being stricter then opposing countries? Or oil regulations, things of that nature lol
FYI, those block numbers tend to be bearing codes, not the actual clearance. Otherwise good show. I agree, electric water pumps are a bridge too far and plastic valve Covers become a service item due to heat embrittalment 😅. Ask me how I know. With the cam oil shower included, it will be an expensive service item.
Thank you! I thought it was the bearing clearances lol.
Thanks for watching!
So the valve covers do become brittle?
All we can do is guess/speculate what caused this mishap. I would have like to have seen the oil that was drained initially at the dealership. Ive read forums where those in the know speak of the EGR cooler you removed somehow allowing water/condensation into the oil on both dynamic force A25a and M20 engines. How much water is unknown but ive read threads where the engine oil appears frothy with water which would not help lubricate the engine bearings, pistons ect. Not a fan of electric water pump either with its historically short lifespan. My 08 Civic Si purchased new has its origional water pump at 16 years of age. Ive been researching this engine for some time now as i do all my own repairs and considered (past tense) purchasing one. PCV valve location is a PITA for example and not easily accessable as with most engines. EGR is overly complex. Water pump failure seems plausible in this case. Surprised how dirty intake valves were knowing this engine has port injectors as well as direct. Chain guides appear all plastic versus honda's metal and plastic design. Plastic bits all about combined with heat and time will fail eventually. Not my cup if tea.
Egr cooler contaminating oil with coolant…. Which forum? How are the owners responding? Just report it and wait for it to grenade?
What are u going to buy instead? Earthdreams are way more junk than anything out there now. Can only get the 2.0 civic
Noticed that main bearing oil clearance by engine service manual are not equal.
For example,
1st, 2nd, 4th, 5th - 0,014 mm standard value.
3rd - 0,020 mm standard value.
What could be a reason for that? What's wrong with 3rd one?
Not exactly sure why it is like that. My guess is after the machine process from the block casting they discovered there was a small difference in the 3rd bearing, and adjusted the manual accordingly. But I could be way off with that LOL
Pistons did move with a bit of persuasion...
A whole lot of it! LOL
Still can''t get how variable discharge oil pump is controlled here. Yes, there's a short chain connecting crankshaft and oil pump, but it is just a driver.
Well, there's something like a chamber in block, where they put pressure sensor.
The pressure value comes to ECU. However, which way the ECU says to oil pump "more , less"? In other words, how does ECU affect the oil pump capacity?
The variable displacement oil pump is actuated by a valve and rod to control the amount of oil volumes that is allowed to enter into the pump itself! It’s really neat, never seen It before!
Hi there, there's a need in some theory. 🙂
you told us that proper oil for A25A-FKS is exact 0w-16 grade (and even 0w-8, e.g. Corolla 2024), because this engine itself was designed for low viscosity oils. To be exact these engines line, I mean "dynamic force".
Could you point out on those particular engine units which will suffer if owner use, say, 5w-30 oil. And please explain. Why?
Also could you share oil clearance for mentioned above engine?
-main bearings standard value and acceptable value;
-connection rod bearings standard value and acceptable value;
Thanks in advance!
I don’t believe running 5w-30 would be wise. Running what Toyota recommends is your best bet. The engine tolerance is 3 thousandths on the main bearings/rod bearings, according to the engine block. The 5w-30 would develop a lot of pressure even it being 30 weight oil. I’m not aware of the recommended clearances for the engine off the top of my head unfortunately. Thanks for sharing and watching!
@@WiseGuyzGarage sorry, 0.003? In other words 3 microns. That is not true. 🙂
0.003 is most likely maximum taper and so called out of round value for crankshaft jornals.
5w-30 ? Well I have the same engine I tried 0w-20 and no difference from 0w16 in my car but I tried 5w-20 and I drained it with in an hour lol I drove and my usual testing my mpg dropped from 34-38 to 19-23 I also could tell the engine was working a lot harder. Went back to 0w-16 for winter and 0w-20 for summer days.
@@wevonox7941 This is great information! thank you for sharing! Its good to know that in a pinch it could work. (5w-20)
@@wevonox7941 Thanks for your info, I personally feel in a battle against Toyota Argentina, they are only using 5w30 for the scheduled services, no matter what i asked for. So after a little research about it, I had to abandon the official service and started doing it myself, with valvoline 0w16 and toyota filters.
@22.40 , this statement is FALSE . the ONLY reason Toyota uses 0w16 in these engines is to satisfy EPA and CAFE laws here in North America . The same A25A engine in other countries run many other oil viscosities with the same bearings . from 0w16 all the way to 10w30 without any issue . Compare main and rod bearing clearances to other Toyota engines from 20 yrs ago and you will see basically no difference in specs . I cant stand this trend in spreading misinformation about Toyotas use of low viscosity oils .
Exactly 👍 he’s talking about water it’s so thin .
Variable oil pump is number one reason then EPA👎
In Ireland these engines run on 0W20 oil
@@Shane-zx4psHi, I bought a 2019 Japanese imported Camry hybrid and went to get a service kit from a Toyota garage. I asked for 0w16 oil and he looked at me as if I had 10 heads 😳.. he said you mean 0w20. I said no this engine needs 0w16 and he said not in Ireland they don’t 😮. So I’ve used 0w20 and hopefully it won’t cause any issues down the line.
@@DIYEnthusiast-24 me too dude, I went to Dennis Mahoneys in Dublin the main Lexus dealer and argued my case for OW16 oil and they said we don’t stock it and our climate only needs 0W20 oil, I rang Lexus head office and they said the same thing, but for my next service I’ll get my OW16 oil online, the latest Camrys are run on 0W-8 oil now.
What are the major differences between the A25A and the 2AR?
I would say the direct injection is the biggest difference. The 2ar has a mechanical water pump, when this has an electric one. Otherwise they are quite similar!
I noticed a huge tooth gear on crankshaft which supposed to be a driver for balancing unit.
My question is, is crankshaft, connecting rods and pistons, this group in whole so much made unbalanced, so it forced Toyota engineers to implement pretty heavy tooth gear and balancing unit? In order to get rid of engine vibration.
Vibration vs Weigth (fuel consumption).
What do you think about?
That’s a great question! From my understanding they have a very large drive gear due to the actual weight of the balance shafts. The 2ar and 2az both have very similar gear tooth designs. You and I both know Toyota loves to overengineer everything to ensure reliability. It’s a wonderful thing they do that. Now, for the unbalanced portion of that, almost all 4 cyl engines are imbalanced from the design and nature of the engine. Fuel efficiency in my opinion comes mostly from the combustion chamber design, as well as the intake manifold. The extremely thin oil helps with the losses of friction from the oil. Hopefully that helps
Nice work. That water pump scares me . I have a 21 rav .
@@boydguie8129 Thanks for watching! That seems to be the only real issues with these. There isn’t a doubt in my mind this engine would easily go 300,000 miles, without batting an eye. Thankfully some other viewers pointed out the cluster will tell you when the engine is getting very hot. So as long as you keep an eye on it, you should be just fine!
ANY engine ever made that overheats will do this if the owner contines to drive it while it's overheating for miles... shut it off and tow it and you'll be OK!
@@LexusGX460-OFF-ROAD Exactly. This engine failure would have been avoided if the Original owner watched the dashboard and pulled over. From what other viewers have said, the pump failing like this seems to be pretty common unfortunately. Thanks for watching!
@@WiseGuyzGarage my mother-in-law melted an engine by choosing to ignore a pegged temp guage for like a week! 😆 don't get me started... lol
@@LexusGX460-OFF-ROAD LOL that's terrible. I'm surprised it even lasted a week lol.
Is it an option to get a better after market electric water pump that is more reliable? BTW, i have a 2024 Rav4 le gas model.
Unfortunately I am unaware of an aftermarket replacement. In this case it might be just one of those things to keep a eye on. The cluster will inform you if the engine is running hot at least. Worst case you pull over, and have it swapped out or swap it out at home if it fails. I wouldn't be too concerned unless something like that happens. One of the comments mentioned it happens around 50-130k miles give or take. Hopefully, this all helps! Thank you for watching I really appreciate it!
@@WiseGuyzGarage Thank you, I appreciate your response. I will definitely keep an eye on it.
Is this the same engin in the 2018 camry hybrid? Any chance you have a video putting it back together?
It should be the same engine! Unfortunately I didn’t put it back together, this engine is no longer serviceable.
@@WiseGuyzGarage The reason I ask.... long story short I have a scrapped 2018 camry hybrid. I ran over a bunch of large rocks on a median......blew up all my tires, fucked my suspension, etc. But the main thing is I blew a 3 in by 3 in hole that appears to JUST be the very bottom of the timing cover. I pulled the dipstick out and it was bone dry. So obviously before I turn the engine on I went to add oil. When I dump oil in I can visibly see it not even making it to the oil pan. It drains directly out of the hole in the timing cover about 1 quart in 30 seconds. For the fucking life of me I can't figure out how that much oil can go straight through an engine. It's clearly not under pressure and can't be turned on and I don't see anything wildly unusual like a thrown rod through the hood of car or anything. I am at a complete loss. I would love to take the entire engine apart but I can only basically get down to the block since I don't have a crane. I've never even seen something like that before. Most oil issues I've seen are rear main seals, head gaskets, hole in oil pan, hairline cracks etc. This is none of those things it literally is like dumping oil from the top of the car and just watching it pour out of the very bottom of the timing cover right where that hole is immediately after. Got any guesses on that one? I'm literally just taking the car apart before I scrap it and this is baffling to me.
@@TheTiltedOne if there is a hole in the engine block you can’t add oil too it. The oil will dump out immediately. You need to replace that timing cover before you even add oil into it. Don’t try to fill any more oil before you fix that issue. Good luck.
The electric water pump internal parts are made of plastics.
Yeah well done like your Video and agree Toyota needs to go back to a Mechicial Water pump that engine is used so much including Lexus where is the reliability from Toyota
I totally agree!!
Not a chance most of our newer models will be hybrid and eventually fully electric 😅
What is the manufacture date?
@@tonyrock5313 great question! The engine is from a 2019 Camry
You the best
how many miles was this motor?
Had about 123,000 miles on it. Besides overheating it looked practically brand new inside!
nevermind 2019 123k miles, looks brand spanking new inside
5 year water pump failure is worrisome
@@diulaylomochohai I couldn't agree more. It is something I think will be more of a age failure, rather than miles.
The a25a motor is only coming of age now i guess
hello jcap
Hello Andy lol
A25A big problem is it didn't get a timing belt it got a timing chain so they never changed the water pump hence blown head gasket
@@rickhunter6479 The water pump is driven by an electric motor that failed sadly. It isn’t driven by the chain, or the serpentine belt. Likely didn’t make noise but some people mentioned the dash WILL warn you saying the engine is running hot. This was just a failure due to negligence unfortunately