Andys89

Well guys, I can't see where the oil leak is as far as I know it's not the valve covers but it's coming from the top rear on the driver's side and it's dripping all over. Where is it common to leak beside the valve covers?

CREWZIN

I had the oil temperature sending unit leak on mine. At least I think it was that...located behind and a little below the distributor on my 87.

85vet

Could be pressure sending unit that crewzin was talking about or the intake(chevy's are notorious for this).
I would check the the sending unit first. It an easy fix compared to the intake.

Sprint7677

Could be the intake manifold gasket, could be the distributor as well.

Andys89

I'll check out the oil pressure sending unit first. I hope it's not the intake manifold, I idea what that would cost to fix?

RRT vette

Could be leaking from either place stated above. In either case your time will be the biggest factor. The gaskets and or oil pressure sender is cheap....<$50.

jimmers

The intake gasket is a common problem.

onedef92

Take it to a reputable shop and have it leak-tested. The techs use an ultraviolet dye added to the oil, then shine a UV light on the engine of the car while it's running in a darkened area of the shop.

flyinlow90

Intake manifold gasket.
That was the leaker on mine. I also had the Valve cover gaskets and rear main seal.

The intake manifold gasket was the only one leaking on mine I just replaced the other ones before they started.

Gary

GKK

I had an Intake Manifold leak on both my "89" and "91" Vettes. It took me 15 hours from start to finish over two days to complete the job. It's not very hard, just time consuming scraping the old gasket material off.

If you decide to do it yourself, purchase some gasket remover spray and use "the Right Stuff" gasket maker which cures like rubber and is more durable than silicone.

GREGGPENN

What about the age of the parts you disassembled. Didn't that make is a royal pain? And/or couldn't that lead to a broken bolt/screw (several times)?

onedef92

You might either purchase a SB rocker arm cover template or use a bunch of shop towels to keep the old gasket material from getting inside the engine.

In either case, an oil/filter change after the job is done is a good idea, too, to ensure contaminants are purged from your oil

rad928music

What year is it?
Could be valve cover gaskets.
Do you smell burning oil when driving?

Allieboy

my oil sending unit leaks. just cant find it yet

CREWZIN

If you can't find it, how do you know it's leaking? It's in back of, and below the distributor. I only know because that's where mine was leaking from.

JackDidley

Thats the pressure sender and pressure switch together on an 87. It gets my vote. Mine went bad a couple years ago. This is a pressurized leak. PUMPS oil out if you let it go, does not just seep. If you take the distributor out its a cheap and easy fix.