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2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900

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Old 11-29-2011, 11:32 AM
CF Junior Member
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Join Date: Feb 2009
Location: DFW, Texas
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Default Oil Leak - Rear Main Seal

I have a 2000 Chevy Silverado Z-71 5.3L truck that has 208K miles on it. For the last 6 months I have been dealing with a one quart per week oil leak that I have been putting off doing something about. Yesterday, I took it down to the carwash and used the degreaser to clean up the engine real good in hopes of determining the leak to be something other than the rear main seal. But, it is clearly coming out through the weep hole in the bottom of the bell housing where the transmission connects to the engine and I cannot see any oil dripping from above as it would if it was coming from the valve covers.

My garage is so full and my driveway so steep I wouldn't trust jack stands on it. If I put the truck on jack stands in front of my house by the curb, the city would be by in short order with some nice things to say. I took it to the shop and they gave me a quote of $916. They said the reason it was so high was they had to remove both drive shafts, the frame cross member, the exhaust system, the transmission, etc. and have to use the standard 8 hour time for that maintenance. Heck, a friend of mine told me all you had to do was disconnect the transmission and scoot it back after disconnecting the drive shafts, he made it sound a lot easier than they did.

I have no desire to buy another vehicle. I have actually said and mean it that I plan on using this vehicle till I don't need one anymore (I'm 47 years old). I found another shop down the street that is saying they will do it for between $350 and $400 although they are of a little shadier nature and are not a national chain. I am caught between many choices: getting it repaired at one of the previously mentioned shops, buying another used truck and selling this one, having a shop put a used short block in my truck, having a shop put a new crate engine in my truck, buying another truck and then clean out my garage and then pulling my Z-71 engine and totally rebuilding it and reinstalling it.

If anyone makes it through this entire long wordy post, please feel free to offer any advice on what you would suggest I do. Obviously, my current plan is to put a quart of oil in my truck every 3-5 days at ~$4 a quart.

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Old 11-29-2011, 09:00 PM
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Join Date: Aug 2011
Location: Slidell, Louisiana
Posts: 343

damn sounds like you looking at a few options lol. If your motor is running strong i would try and do it yourself, your friend described it pretty well. It one of those things that its not hard just a pain. If you can't do it yourself or have a friend help you i would go for the 300 to 400 dollar deal. Ive had some good luck with the old ragged looking shops. Hope you figure it out
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Old 11-30-2011, 10:33 AM
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Join Date: Feb 2009
Location: DFW, Texas
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Alright. Thanks for the advice. I appreciate it.
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Old 12-02-2011, 01:29 PM
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Join Date: Dec 2011
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Default reply oil leak

Hey Greg I think I've got the same thing going on with my truck. I have a 01 1500 2wd and at first I thought it it was tranny fluid leaking but I regularly checked the level and there has been no change. I have been checking the oil level and it hasn't dropped much. My dad is saying it is the main seal and my uncle says it could be the main seal but maybe the torque converter warped it as opposed to it just breaking down...????...Not sure what to think but hopefully I will have time in this next week to replace it. I plan on doing it myself cause I trust myself mechanically and my money doesn't grow on trees I will let you know what I run into/prices/time if I do it before you decide what to do.
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Old 12-04-2011, 11:35 PM
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Location: DFW, Texas
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Yeah, the more I think about it, I think I'm going to have to do it myself too. If I'm going to part with that much money, I'm going to have to get something tangible out of the deal. I would imagine I would be getting charged for 8 hours labor while someone tried to see if they could do it in under 3 hours. If I had a lift and a well stocked tool cart like all shops do, I'm pretty sure I could do it in 3 hours and I haven't ever done it before. I'll probably look on You Tube or go get the dealership manuals and see if that helps. Thanks.
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