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Found a leak today, need advice

 
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Albert2kls
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2000 Chevrolet Impala
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PostPosted: Fri Jul 29, 2011 12:38 pm    Post subject:  Found a leak today, need advice Reply with quote

I got under my car today and found a engine oil leak coming from between the engine and transmission. My question is, has anybody replaced a rear main on these cars? Is there a topic with procedures or anything to help me out?
Its a 2000 LS 3.8
Thanks in advance
Albert
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IffyG
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PostPosted: Fri Jul 29, 2011 1:18 pm    Post subject:   Reply with quote

Is it the rear main or is it the oil pan gasket? The oil pan gaskets have a tendency to leak badly on these cars. Mine was leaking for years before I got around to having it replaced when my transmission crapped out. If it's the oil pan gasket you can do it yourself if you have a way to support the engine/trans from above since the cradle needs to come off to get the pan out. As far as the rear main goes, I'm fairly certain the transmission needs to come out for that to be replaced.

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Albert2kls
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PostPosted: Fri Jul 29, 2011 2:13 pm    Post subject:   Reply with quote

IffyG wrote:
Is it the rear main or is it the oil pan gasket? The oil pan gaskets have a tendency to leak badly on these cars. Mine was leaking for years before I got around to having it replaced when my transmission crapped out. If it's the oil pan gasket you can do it yourself if you have a way to support the engine/trans from above since the cradle needs to come off to get the pan out. As far as the rear main goes, I'm fairly certain the transmission needs to come out for that to be replaced.



Well, when I was under there it looked like it was coming from the middle of the tranny and engine. Also the car had a new oil pan gasket put in sometime recently, and you can see the new gasket. I am not going to rule out the pan but I will assume that the rear main is bad also. If I am going to tear the cradle out I might as well drop the tranny and put in the seal and the front pump seal for the tranny while it out. So it will be a big project but do it all at once and then its done.

Can the whole drivetrain and cradle come out in one unit, like the camaro/firebird?
Have you or anyone done this type of repair?

Thanks again
Albert
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MISHNAH
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PostPosted: Sat Jul 30, 2011 11:33 pm    Post subject:   Reply with quote

Yes, the entire powertrain and cradle can be dropped out as one unit.

Honestly, unless the rear main seal failed completely and was SHOOTING out oil like no tomorrow, I would not mess with it. Its a ton of labor to change out a $10 part, and its a seal that leaks in 90% of cars on the road, but almost never enough to warrant the $500+ labor needed to change it.

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Albert2kls
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2000 Chevrolet Impala
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PostPosted: Sun Jul 31, 2011 3:04 am    Post subject:   Reply with quote

MISHNAH wrote:
Yes, the entire powertrain and cradle can be dropped out as one unit.

Honestly, unless the rear main seal failed completely and was SHOOTING out oil like no tomorrow, I would not mess with it. Its a ton of labor to change out a $10 part, and its a seal that leaks in 90% of cars on the road, but almost never enough to warrant the $500+ labor needed to change it.



You are correct in the part to labor ratio.... These suck to do on any car but I dont like leaks and am willing to devote a weekend to doing it along with a few friends. What I am basicly looking for is the correct way to remove the tranny since that is the easiest way to attack the seal, right? Also while the cradle is down I will put a new oil pan gasket in and mabe that U-bend delete pipe with the upgraded down pipe. That way it makes all that labor kinda benificial and I can somewhat justify the time being put in the car. May also put the urathane mounts in. Where do I get the shorter upper mounts from, what vehicle? So I can start looking in the junkyard. I finish my summer classes in less than 2 weeks and will have 2 weeks before the fall classes start and would like to do it at that time. So any and all help and advice is greatly appreciated.
Albert
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