3RZ Oil Leak

Just posting this here for others in the future.

The oil seal that is behind the coil pack mounting bracket is part number: 90339-36001
I ordered one from Amazon here:

$12 Genuine Toyota 90339-36001 Cylinder Head Plug

https://smile.amazon.com/gp/product/B00KTKX1DE/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 where they call it an "engine expansion plug"
This plug blocks off the hole where a distributor gear would pass through to the cam shaft. I'm not sure why toyota left this hole.
I cannot find a definitive name for this seal/plug either. Toyodiy lists it as "standard part" and I cannot find it in any FSM.

Here's a diagram that shows it from a Japanese website.


EDIT: found a post here with the same leak
https://www.tacomaworld.com/threads/oil-leak-help.467666/

 

Ok I'm back, my bad should have read the policy. So were you able to figure out the leak

 

Yes, I confirmed my original leak is in fact the rear main seal. I got a cheap inspection camera and was able to see oil on it.

I discovered another leak if you look at posts #12 and #21. I'm still waiting on parts for that.

I did receive the bars rear main seal leak stop stuff, but I think I need to drain a little oil in order to put the full bottle in. Fortunately I have a fumoto drain valve so that should be pretty easy.

 

if you can, stay away from the additives, and see if you can take on the repair direct and replace the part.

 

I think he's going that route just temporarily on the seal sweller stuff. Until he can get to pulling the tranny and getting the seal replaced.

 

Correct, and I'm not going to pull the tranny just to replace that seal, unless it starts leaking a lot.
At some point I want to swap to 4WD, so that is when I will most likely replace the seal.

 

I posted this in the what have you done today thread, but I thought I would update it here as well.
I drilled a hole in the center and it pulled right out with a pick that I had. I was prepared to tap the hole and try to pull it out that way, but it just came out so easy. I put some FIPG in the hole prior to tapping the new plug in, which was a much tighter fit than the original. I did it this way because I didn’t want to pull the valve cover since it wasn’t leaking and I didn’t want it to start!