Help 1990 gq 4.2 petrol oil leaking at rear TOP gearbox

[Lucky boy]

I'm lost
Checked the rocker gasket at rear ...dry
Checked the cylinder head ar rear ...mmm seems dry with mirror view and hand ..
Top of Bell housing and running down both sides oil ...
What's going on ? Any ideas ?
The bottom I'd get but the top And it's awkward being the back of engine and front of gearbox to really see ...unless someone's been there done that .......

[growler2058]

Would have to be rear main seal ay?

[Lucky boy]

But at the top of gearbox box ..I'm still leaning toward the head gasket but are there any oil galleries at the back of the engine to cause this ...it's quite a good bit of oil

[BrazilianY60]

My GQ is diesel so I don't know about your engine layout, but any chance the distributor is around an offending area with regards to the oil spill? I have a petrol Suzuki Samurai where the distributor is driven by the back part of the head, so leaks on that area are 99% of the times due to an o'ring that seals the distributor axle.

[Lucky boy]

No ...
The distributor is at the front part of engine block..it's baffling me

[MB]

Can’t unfortunately help LB Mate with diagnosis but an old trick for hopefully finding sneaky oil trail origin leaks:
Wash/degrease the suspected areas and thoroughly dry, run the engine/box/pump etc, then use the likes of a talcum powder hygroscopic puff puff bottle to track down the sneaky snail trail hopefully left after a blower off of the dry dust [emoji1696]


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[Lucky boy]

OK so found where it's at the back of number 6 and it's between cylinder head and block ..it's definitely oil ...so question because it's oil will this be able to be temporarily fixed with gasket stops leak in the coolent or will this not reach as oil or cracked head ? Any good mechanic in Rockingham wa who knows tb42 engines to help ?

[Lucky boy]

Engine runs fine no oil in coolant and vice versa ....just leaks oil fairly well when warm ...so annoying...poorly fitted head ....warped ....cracked ...anyone else had this ?