- Nov 29, 2021
It's really as simple as that rings are more than likely the problem in this case.I do remember that oil consumption could be a problem if the PCV screen on the cars got plugged. That was an odd design, there being that metal mesh "filter" located below the PCV valve in the back of the intake, so you clearly couldn't see it.
It SOUNDS like you are describing the last couple of years just before they went roller?
As far as rotating assembly went, the HO got a different one from the LoPo (and had forged pistons up until 92), can't remember if the truck and panther cars got the same one or not? I know the cars had cast pistons. They obviously got different cams and the cars were roller from like 85 or 86 onward and SEFI, while the trucks were batch-fire. LoPo cars didn't get the E7TE's either, IIRC? been a few years though since I was deep in the 5.0L scene, so I may be forgetting or mis-remembering some of this.
I did skim the truck forum TSB's last night after you mentioned it and didn't see anything mentioning rings. Did see some stuff on engine knocking and oil fill procedure. You have piqued my interest, so if you can remember anything else, please let me know.
Edit to @Rand
you keep trying to post as an expert
I do not, though I appreciate your thirst for Toyota information.
Rand, not only do people at Toyota talk about the product, what uses what, what has issues just like Nissan JATCO transes.. but its pretty well known from readily available info that Toyota's shot at this wasn't the best. Obviously I was part of production of the car. Never unwrapped an engine... unloaded some.. still though, Toyota isn't really the amazing golden vehicle some think they are, this is to address your post that I post "as an expert," nope, I'm just your garden variety idiot having worked there, seen why I'd never look at the (newer models) the same way, and then this engine and the 1ZZ, with their well known shortcomings.. may have even been remedied by now. (You can think I'm an expert if you want.. I'm an employee that got an inside look and was a part of a team. That fed every part of the process. But enough about me. That's the problem with message boards. Trust me, you'd think some are. But are they? Are they.)
We also FFed the 0W-16, not sure where everyone gets 0W-20 from. I believe that transition has completed. For cclarification. That would have been done in Final.. I'd love to talk to you about Toyota.
Now I could go posting videos of oil-consuming Toyota engines and their fixes. But that would be a de-rail..