Insane oil leak PLEASE HELLLPPP!!

[Brendan]

IMG_3459[1].jpgG'day all

New member and first time poster, In my garage right now I have a 12/91 Twin turbo GTO which I have to fix. I have got it running after it had sat for about 5 years due to a brother (the owner) who didn't look after his car. It had a lifter stick and was making a hell of a knock (have video proof of this) and now that I have solved this issue when i start it and let it run it leaks oil down the transfer case and all over my precious shed floor. This is not acceptable. I will upload some photos from my phone to show.

Now I have no idea where the leak is coming from. It has to be something pressurized due to the amount of oil that comes out. I considered the fact that it may be a crank oil seal but then I thought even that wouldn't drop this much oil. I even thought maybe a turbo feed line but alas not it either. because of how cramped it is in the engine bay I just cant see where it comes from. I am about to remove the inlet manifold so I can do a full compression test too.

Turbos on it are pretty average too they are in dire need of an overhaul, Luckily I have 2 spare (roughly) TD04 turbos which I can test with.

I would truly appreciate any advice given!

Thank you all!

From your new mate down under.


Edit: I will have to get photos later, I have stupidly deleted them!

[green-lantern]

It could be a few things but since it's leaking down the transfer case I'd say rear main seal. Put it on a lift or jack stands and track it down.

Welcome to 3sgto!

[anyonebutme]

Oil leaks are one of those things where the only way to locate it is to look for it, and keep looking upwards until the wetness stops.

Also, possible cause may include rear valve cover and rear headgasket.

[CoopKill]

I vote rear valve cover as well. Possibles to add is the rear feed/return oil line for the turbo.

[green-lantern]

I vote rear valve cover as well. Possibles to add is the rear feed/return oil line for the turbo.

or somebody left the rear drain plug in the turbo lol

I think the rear drain is a little to far on the drivers side to leak on the TC.

[Toni]

I've had many leaks in this area over the years. It could be one thing or just a combination of others.

Engine:
rear main seal
valve cover gaskets
cam end caps seals
turbo return line pan side or turbo side (Although this generally just leaks straight down to the pan)

Transmission:
inputshaft bearing seal
output shaft seal

You say it's gushing? Are we talking like floor covering/turn the engine off quick or can you leave it running with an oil pan to catch it?

[CoopKill]

Umm, I have words, but will abstain!

[Toni]

LOL, I was thinking about going there but I already gave you too much shit

[Jimvr4]

There's nowhere Paul won't go

[green-lantern]