Oil Leak

[V8FOU]

I have a 1UZ and it is driving nuts!
No problem until you really rev it, then it leaks oil from the rear real bad. I changed the rear seal when doing some other work and also sealed up the flywheel bolt as some oil was getting past those.
I'm wondering if anyone has had anything like this? The oil is coming from the rear r/hand side. I am guessing it may be coming from the sump seal? Although that is just sealant, I suppose it could leak?
There isn't a breather problem as far as I can see.
So, any ideas? Anyone else had this?

 

[Zuffen]

Have you had the sump off?

If you have that would be my starting point. Also probably the easiest.

I had an oil leak similar but on the left side.

I was using a Rodshop sump and they didn't use two of the holes and the oil was leaking through the unused hole.

The other option is the rear main seal carrier. This uses sealant to seal and it could be coming from there.

Otherwise it would be cam covers or half moon plugs behind the camshafts.

 

[V8FOU]

Thanks for that. Not cam covers as the engine is dry above sump level. Upper sump is coming off tomorrow!

 

[V8FOU]

RE-sealed sump/oil pan with Dirko sealant. Seems to have done the trick. Thankfully.....