Its leaking about a puddle the size of a CD everytime it gets good and hot. Im not too worried about it but I need to fix it soon. I guess what I am asking is can I fix this myself or should I pay the $320 to have someone else do it? I already have someone who can and will do it for that but I have access to a lift at a transmission shop so getting the tranny is not a prob. When I get the tranny out, how much work is it to fix the leak? I know I can do it but is it worth it? Any info would be great. Thanks alot guys.

Bo

 

Have you ruled it out being the infamous manifold leak first? Reach behind the intake manifold on the left hand side of the cowl and feel the junction between the block and manifold. If it's oily, it's your manifold.

If you're positive it's your rear main seal, then fixing the seal is easy. It's getting to it that's a pain in the ***.

Remove the transmission. Base what you need to do on removing the transmission. If you have decent automotive knowledge and an adequate supply of tools, you can probably do it yourself with a friend.

 

Im 99% sure its the rear main seal but I will double check in the morning when its cool. Thanks alot RamAir95TA.


Bo

 

No problem. The vast majority of oil leaks on LT1s are at the rear of the intake manifold. It's a very common problem, because the extreme temperatures of the EGR tube can break down the thin gasket seal at the back of the block.

 

unless you have access to another friend and a lift id pay to do it, you have to drop the tranny to get to it.

BTW: Nice 4-4-2 check mine out in the sig. Mine just got done a 7 year frame off restoration.

 

You could do it with a tranny jack and some jackstands. It isn't really that hard to do. Once you remove the transmission, you just remove the bell housing, pressure plate and clutch disk, unbolt the flywheel and there it is. Pry out old, drive in new. The hardest part is of course, dropping the transmission.

 

Thanks guys. The removal of the tranny is not a problem. My dad used to own a tranny shop so I have access to a lift and whatever tools I need whenever I am in town. My dad is going to be helping and so is one of his buddies that is a true mechanic. They can do just about anything. I think I am going to try to do it myself. I will let you know how it turns out.

Blue89Bird-7 year resoration. I wish I could make mine look that good.

Bo

 

LOOK at the manifold, oil sender, low oil sensor in on the pan, and oil pan gasket. Not to normal to have to do rear main seal. How many miles on the motor?

 

The car has just under 114k hard miles on the clock. I had a small tranny leak and took it to a very good shop and he told me it was the rear main seal. I trust this guy and thats why I didnt look into it much further. I will check out those spots on the car as soon as I get a second that it isnt hot. I know its not the pan gasket or the low oil sensor. If anything other than the rear main seal, its gotta be the manifold but Ill check into it. Thanks alot 94SLUG.

Bo

 

No problem but make sure you check out oil sending unit same area where it leaks from the intake. It will drip all the way down just past or even on the rear main seal to the ground. I would say the intake is the worst of all to fix. Good Luck

 

Well, I got it up on a lift last night just to investigate where my leak was coming from and in fact it was the rear main seal. Also, as many of you have said, the intake is leaking as well. I would say Im one lucky guy. Anwyays, I cant tell which one is leaking more so what I need to know is which leak is worse for the car? If the intake is going to get worse and worse then I will fix it first. Same with the rear main seal. Let me know what you thing. Thanks.

Bo

 

A ttt for the night crew. Im going ot bed. Ill see everyone in the morning.

Bo

 

OFFICIAL:
Why has oil coated the underside of my engine and transmission?

It's most likely that the seal around your intake manifold is leaking. While it was originally thought to be the intake manifold gasket itself leaking, it's now found to be the sealant being used. The reason is a gasket is only applied to the left and right sides of the manifold while the front and back are sealed with RTV sealant. If the sealant is applied to a surface which isn't clean, the oil will be able seep through. This is why the oil leak is usually found at the rear of the engine (dripping down onto the tranny). It can be EASILY MISTAKEN FOR A REAR MAIN SEAL LEAK. And since the RTV sealant is used on the front of the intake manifold, it's not uncommon to find it leaking there, too. A classic symptom of this intake leak is a rough cold idle. There is a Technical Service Bulletin (#476111) which calls for the replacement of intake gasket with a new and improved one, but that's to deal with a problem of the actual gasket (used on the left and right sides of the intake) laminate burning and causing a foul odor to enter the car through the ventilation system. If you have a 1994 F-Body, you might be able to get your oil leak fixed using this TSB (even though it's for a separate, but closely related problem). Otherwise, you'll have to have the dealer verify the leak which will likely be running black-light dye thorugh the engine. The revised gasket kit is part # 12524653.

Other, less common areas to check for leaks include the oil pan gasket, the oil dipstick tube seal (where it enters into the oil pan), and the timing chain cover seal.

damn im good