Oil pan \ rear main seal leak backyard fix? - Team Camaro Tech
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post #1 of 21 (permalink) Old Dec 3rd, 16, 11:45 AM Thread Starter
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Jeremy
 
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Oil pan \ rear main seal leak backyard fix?

Hi All,

I recently had my motor rebuilt by a pretty reputable local shop and I noticed yesterday oil on my garage floor. I jacked up the car and had a look and it's coming from the rear of the motor. Here's the root of my question... it looks like the shop used undercoating or flex seal or something similar and sprayed it all over the place between the motor and trans. It looks like crap... I ask the shop and he assures me that he does this with every motor because they will all leak. I think this is BS, am I right? I assume if the job was done right it would not be leaking?

What do you all think? Have you seen this before?
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post #2 of 21 (permalink) Old Dec 3rd, 16, 12:10 PM
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Re: Oil pan \ rear main seal leak backyard fix?

I agree with you 100% if he used the correct material for the job and assembled the seal by the directions there should be no leak. What I have found out about these Camaros is that letting them sit in a garage is not good for them.
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post #3 of 21 (permalink) Old Dec 3rd, 16, 01:21 PM Thread Starter
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Quote:
Originally Posted by camarodriver67 View Post
I agree with you 100% if he used the correct material for the job and assembled the seal by the directions there should be no leak. What I have found out about these Camaros is that letting them sit in a garage is not good for them.
Agreed, I drive mine as much as possible!
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post #4 of 21 (permalink) Old Dec 3rd, 16, 05:58 PM
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Bill
 
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Re: Oil pan \ rear main seal leak backyard fix?

The builder is wrong. A rebuilt engine should not leak.
I don't know what he sprayed all over the place, but it sounds like a short-cut that didn't work.
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post #5 of 21 (permalink) Old Dec 3rd, 16, 07:17 PM
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Re: Oil pan \ rear main seal leak backyard fix?

How many miles since it was rebuilt?

Don

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post #6 of 21 (permalink) Old Dec 4th, 16, 07:50 AM Thread Starter
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Maybe 20

Quote:
Originally Posted by dhutton View Post
How many miles since it was rebuilt?

Don
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post #7 of 21 (permalink) Old Dec 4th, 16, 07:59 AM
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Don
 
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Re: Oil pan \ rear main seal leak backyard fix?

agree with the previous poster that something is not right..
back to the legal stuff:
was there a written contract/ guarantee?
Will the engine shop fix it?
any photos of the 'spray on' stuff?
how bad is it leaking?
bottom line:it should not leak!
any reputable company should investigate a problem and determine if they are at fault and then fix it!

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post #8 of 21 (permalink) Old Dec 4th, 16, 08:42 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Agree with others here, engine should not leak unless more blowby then the PCV system can handle.
No need to spray on additional sealer if gasket(s) are installed correctly.
I suggest there should be a warranty period?
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post #9 of 21 (permalink) Old Dec 4th, 16, 08:51 AM
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Re: Oil pan \ rear main seal leak backyard fix?

I have never herd of anyone spraying anything on a engine after a rebuild except paint. Sounds like a very poor quality shop who does not know to seal gaskets correctly and I would be afraid of there work
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post #10 of 21 (permalink) Old Dec 4th, 16, 08:59 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Total BS, a new engine should not leak,period. Take it back and make him fix it right. I had a motor built last year and had an oil pan to timing cover leak. I brought it back after the motor was in the car and he replaced the oil pan gasket with the engine in the car free of charge. That's what reputable builders do.
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post #11 of 21 (permalink) Old Dec 4th, 16, 09:25 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Let me guess Big Block ??? They are very common to leak. I have changed mine 4 damn times on my 396. Small blocks are not so common. What engine are we talking about ?? I don't know what the heck that shop did, but it sounds like shoddy work as well.

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post #12 of 21 (permalink) Old Dec 4th, 16, 06:00 PM
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Re: Oil pan \ rear main seal leak backyard fix?

Agree with the others, properly assembled the gasket and seals should keep the oil in the engine, any spray on gunk applied to the exterior of the engine is snake oil (no pun intended) and should not be there. This is one more reason a rebuilt engine should be placed on an engine test stand for break in and a good test run rather than dropping it in a car and hoping for the best. Any problems such as oil leaks are much easier to deal with before the engine goes in the car.

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post #13 of 21 (permalink) Old Dec 5th, 16, 06:08 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Quote:
Originally Posted by DT View Post
Let me guess Big Block ??? They are very common to leak. I have changed mine 4 damn times on my 396. Small blocks are not so common. What engine are we talking about ?? I don't know what the heck that shop did, but it sounds like shoddy work as well.
Yep! Big block! Don't EVER use chrome timing chain covers!

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post #14 of 21 (permalink) Old Dec 5th, 16, 06:16 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Quote:
Originally Posted by Matt 69 View Post
Yep! Big block! Don't EVER use chrome timing chain covers!
And if you do use any covers that are chrome plated (BBC, SBC or otherwise), either media blast or grind/sand the chrome plating carefully on the gasket surface areas to give some "tooth" for the gaskets to seal against.
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post #15 of 21 (permalink) Old Dec 5th, 16, 07:07 AM
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Re: Oil pan \ rear main seal leak backyard fix?

Quote:
Originally Posted by camarodriver67 View Post
I agree with you 100% if he used the correct material for the job and assembled the seal by the directions there should be no leak. What I have found out about these Camaros is that letting them sit in a garage is not good for them.
Yep, noticed this as well, BBC with Muncie, notice a few drop of oil out of rear of Muncie towards middle to end of winter, then after a few drives in the Spring it goes away, but come back from sitting again in the winter.

Also thought I had an oil leak around filter on engine, turned out to be from rear of valve cover gasket, due to master cylinder allow much room, kinda tricky to set cover on straight and bunched up gasket, switched to studs and Felpro gasket with metal insert and made it much easier to install without gasket wiggeling around, leak gone. It's funny how oil travels and confuses ya sometime where the actual leak is coming from.

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