Confirmed- don't switch back to regular oil after high mileage

Or race oils. When our circle track car was sponsored by royal purple they had no less than 25 formulations to choose from just for the engine. We just told them our set up and went with what the engineers suggested.

 

I didn't read the whole shit show of comments did OP say what year and mileage on his truck was?

 

Except on Land Rovers, when they stop leaking then you have a real problem.

 

170K + 3 weeks...2nd Gen I'm guessing...

 

Yes that is. My Dad has somewhere in the neighborhood of 80-90k on regular old dino Rotella T on his 1200 bandit. Some people swear by it and some people scoff at it, seems to have worked alright there though.

 

Convential oil is more than likely used when the truck was built. If you’ve switched from conventional to synthetic then you will have leaks. Surprised that the only place you’ve seen is from the oil pan. Switching back might fix the leak provided you haven’t driven it a lot.

I’m sure experiences may vary here on the forum but it’s common after switching. The one or two mechanical engineers here would probably agree.

 

That's what I use on my vstrom 650.

 

When I was working on aircraft, the old radial 9 Pratt and Whitney engines, if there wasn't a puddle of oil under it, there ain't no oil in it. Not to mention before starting if it sits for a long period of time you had to pull the spark plugs on the bottom 2 cylinders to drain the oil out of the combustion chambers

 

Update: took off skid plate and it is in fact the timing cover seal. So I guess the oil may or may not have contributed to the failure. Farther-in-law isn't looking forward to the job and hasn't done it on a tacoma. Anyone here done it? How bad was it? Also should we do the timing chain while we're at it? At 170k and the truck is an 06 with auto transmission if that matters. Thanks for all the responses so far.

 

Oh, was trying to post pictures but having a hard time from my phone.

 

If your sweating doing the cover, the chain is more of a pain in the ass. The chain is good until 350k easily

 

From what I've read, there is the timing chain cover and a small timing chain cover plate. Leak could be from either or both. There is a TSB and lots of threads on the issue; use search feature to find them.

 

I live on Guam. Slept last night ... no snow! What gives?

 

You could try cleaning it really well and smearing a little gasket maker on from the outside, some people here have done it and had success. It's not under pressure.

As far as the HM oil, it wouldn't contribute to a timing cover leak, since the timing cover doesn't use a regular rubber gasket (unless it's the small square plate). They used some rtv type stuff at the factory, probably applied by a robot.

 

If you had snow in Guam , I’d be worried it was the end of the world lol

 

Me too!

 

No real snow during the last two sleeps. I think this means it'll be safe for me to switch back to regular oil from high mileage.

 

That is one of the well known sources of leaks on the 1GR-FE. Yes it is a pain in the ass as you will have to remove the oil pan (Both of them as it has two assemblies Upper pan and lower pan ) in order to do it IAW the Toyota Service Manual. Some have done it without removing the pan, but not easy.

 

Is there a fix for this issue? To prevent it from happening again. Did a search and looks like it was because one of the bolts causes the leak. Is there a replacement that's shorter or something? Also most of the threads I saw were trucks in service a lot shorter time/miles than mine, wonder why it took so long to fail.

 

Also, I'm going in for the frame swap soon (parts on order) anyone know how many approx hours it would save with the engine out to do the job? I'll probably end up giving my FIL about 300-400 for his time to do the job anyways, but would have to pull everything off to do it. So maybe have the dealership do it while the motor is out if the cost would be about the same. Unless the dealership would let us take the motor for a couple days while it's out. Dont think they'll do that for liability reasons though. Thoughts?