The Car Care Nut talks UR V8 blown head gaskets
- Thread starter dudemancool1904
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
I’m surprised that I don’t hear much about this on these forums. But, the people on these forums tend to do a better job at maintaining their rigs and changing their coolant.
I’m also surprised they didn’t talk about buying a used Tundra motor and swapping some of the long block components over. That really seems to be the best option here.
I bet this owner gets the head gasket fixed and dumps the rig before it blows again, which is a shame. I could be wrong though.
The thing is - if you get 200k miles out of a motor, then that’s still pretty impressive. The 200 drives unlike anything else on the road and is comfortable as hell. If I needed to drop 20k to replace the motor, so be it, and I would be happy if the next motor lasted 200k miles. You just can’t buy rigs that drive like the 200 anymore.
I’m also surprised they didn’t talk about buying a used Tundra motor and swapping some of the long block components over. That really seems to be the best option here.
I bet this owner gets the head gasket fixed and dumps the rig before it blows again, which is a shame. I could be wrong though.
The thing is - if you get 200k miles out of a motor, then that’s still pretty impressive. The 200 drives unlike anything else on the road and is comfortable as hell. If I needed to drop 20k to replace the motor, so be it, and I would be happy if the next motor lasted 200k miles. You just can’t buy rigs that drive like the 200 anymore.
Last edited:
overheating prevention public service announcement. great video.
I just did 30k fluid service on everything except coolant, I read it’s good for 50k or 5 years and he said the same in this video. However… I’m wondering if I should do it with the rest of the stuff.
His statement “you can’t maintain this vehicle too much” really sums it up.
I feel for the owner. I’d probably pony up and fix it right.
Someone is on mud right now and they will be the 1st to LS swap theirs, I wonder who?
His statement “you can’t maintain this vehicle too much” really sums it up.
I feel for the owner. I’d probably pony up and fix it right.
Someone is on mud right now and they will be the 1st to LS swap theirs, I wonder who?
wonder if 'the black stuff' that wore out was Viton.
seems like a failure of the coating after the tiniest warped gap was able to penetrate. this article explains how Viton is susceptible to certain acidity levels (as the car care nut mentions with old antifreeze).
lakeerierubber.com
seems like a failure of the coating after the tiniest warped gap was able to penetrate. this article explains how Viton is susceptible to certain acidity levels (as the car care nut mentions with old antifreeze).
What is Viton (FKM Rubber)? Properties, Applications, & Uses
What is Viton (FKM rubber), and what is it used for? Learn about Viton, its properties, and its applications.
lakeerierubber.com
Man, I disagree. 200k+ miles is easily attainable and is expected for pretty much any maintained TOYOTA engine / model. I'd be severely disappointed if this was my truck. You can tell he feels for this customer. There are no good repair options, mostly because the 5.7's aluminum block is prone to warp when these failures occur.
His hypothesis is that 5.7 head gaskets are deteriorating over time and eventually blowing because of insufficient coolant change intervals. "Insufficient" simply means following the service manual - which is what most owners will do. The overheating is the symptom of failure, not the cause. (Whereas in the superior 4.7 V8, the head gasket typically will only fail because of a -severe- overheat occurring)
Sounds to me like a warning to anyone buying a 5.7 used, to verify the coolant change records (every 5 yr / 50k) otherwise you could be purchasing one where the head gasket has already partially deteriorated and weakened, possibly resulting in a likely future failure.
Long live the 4.7 V8
I have a 2017 with 112k miles. Car was dealer maintained with oil changes every 5k miles as shown on the Lexus app. If the 100k service was performed, I'm assuming they coolant was flushed per the schedule.
Last edited:
i get it.
the 'overheating prevention' is the maintenance of the fluid from becoming overly acidic in the first place, which decays the gasket coating, leading to fluid leaks and overheating. the warped block then being the ultimate victim due to said overheating.
That year is certainly worth more than $23k. I'm curious how common this really is, after all there are so many of these engines out there in several vehicles by Toyota. Recall the 1FZ-FE in the 80 is known for blown head gaskets, doesn't stop anyone from driving it. That said it is repairable, I think the point here is the cost to properly repair the UR V8.
The thing about other Toyotas and other manufacturers is typically the components (besides the engine) are worn out by this mileage and you need to overhaul many parts besides the engine.
The LC is different in that you can drive many more miles on these other components and you don’t have so many small things breaking or needing replacement all the time.
Engine failures are still very rare, and if you do end up one of the unlucky ones, then you can be rest assured that the rest of the vehicle should be in good shape, thus the investment to fix it is worth it. That’s generally not the case with other vehicles.
However, as others have mentioned, proper maintenance is key on these rigs to last a long time.
Head gaskets fail. What is shocking is $20k to get it back to 100% if the block is toast.
But based on 2024 pricing it is doable and the resale valve should be fine depending on the shop and documented work.IMO.
But based on 2024 pricing it is doable and the resale valve should be fine depending on the shop and documented work.IMO.
32cls6speedmt
SILVER Star
Great share, thanks very much dudeman! Another valuable thread on IH8MUD.
My thoughts:
- Happy I own a LC200 with so much knowledge and experience to reap the benefits from
- Even happier I own from new with 36k miles on it
- Looks like I will go to changing coolant every 50k miles instead of 100k miles per warranty/maintenance booklet
- Will also buy myself some coolant pH test strips to watch the '21 LC200 and '14 BMW 535d we own
- If i remember let me report back the pH readings on each
My thoughts:
- Happy I own a LC200 with so much knowledge and experience to reap the benefits from
- Even happier I own from new with 36k miles on it
- Looks like I will go to changing coolant every 50k miles instead of 100k miles per warranty/maintenance booklet
- Will also buy myself some coolant pH test strips to watch the '21 LC200 and '14 BMW 535d we own
- If i remember let me report back the pH readings on each
Last edited:
Did a quick search on Mud, and there are more than just a few head gasket failures reported. @Atwalz had a picture of the failed gasket, just like in the video posted above. I'm not inclined to look, but how many would be found on Tundra or Sequoia forums?
I love the V8 in the 200, makes this beast a joy to drive. That said, the list of potential issues with this engine is growing.
I love the V8 in the 200, makes this beast a joy to drive. That said, the list of potential issues with this engine is growing.
I would assume since you cant really get all the coolant, a simple way is to just flush the radiator every 30k. Nice and simple, don't need to get at the block drains. That way you are swapping in decent amount of coolant often without too much hassle. That way its just part of the other maintenance done every 30k.
This is what I’m thinking.
The 1UZ and 2UZ were the best V8s Toyota ever made. This is just more evidence.....
I thought they all have their minor issues, including the vehicles they were put in but with maintenance and some replacement parts they all can go a long distance and last many years.
Head gasket is not a minor issue. UZs have no chronic debilitating issues.
Seems to me that Toyota has had head gasket issues on their engines for many years. The 4th gen 4L, 2ZR-FE, 2GR-FE, 2AZFE, 3VZ-E, 3UR and others. Not so much on the 22Rs. Now that I think of it, with over 50 years of fiddling around with cars, I have seen more BHGs than I can count on most every kind of car. Seems to be a rather common problem for all makes and models. Subaru, BMW and Mazda have certainly had their problems. I just have to wonder if the problem on the 3UR is in reality any worse than any other make or model.
Last edited:
