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Old 06-14-2003, 12:36 PM
 
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Oil Leak

Having aproblem solving a oil leak under my new rebuilt 350 Small Block Chev, with less than 1000 miles.
I have tried every known make of pan gasket, I installed a new rear Main seal,( one that relocates the seal lip forward a few thousants).
I even tried a different oil Pan.


HELP !!!!!!!!!!!!!!!!!!

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Old 06-14-2003, 01:19 PM
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Since you said you replaced the rear pan seal, I'm assuming your leak is in the back. Could it be the rear main seal? What year engine is it? If it's a SBC have you tried a one piece seal?
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Old 06-14-2003, 01:56 PM
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Does the leak get worse as the oil pressure goes up? if so check the rear gallery plugs, recently I ran into one that was fresh rebuilt also and the machine shop didn`t install any sealant on the plugs and they leaked. it`s hard to tell if it`s them, but one clue is if you park the car on a slight slope and the oil runs to the low side and does not appear to be coming from the rear main seal, this indicates it`s coming from a higher place, and the oil galleries are right above the rear main seal, just to ask, your positive the new seal`s lip is pointing inward? if not it`ll leak.
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Old 06-14-2003, 05:14 PM
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Just a thought but is the oil also up front and possibly blowing back...? If so a common mistake is to not plug the bolt hole that goes through the block casting to lock the fuel pump rod in place when changing the mechanical fuel pump... It takes a short 3/8" SAE bolt (about 1/2" of threads and a washer) to plug this hole but not interfear with the pump rod... Note their are two hole just line up the one with the pump rod (bottom one I think...?)
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