LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Oil pan leaking! Brand new!

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Old Apr 5, 2010 | 06:39 PM
  #1  
hdominic's Avatar
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Oil pan leaking! Brand new!

Okay guys,
I just did a total engine overhaul on a 1994 Trans Am LT1 and used a new blue Felpro oil pan gasket. When I cranked up the engine, I was pleased to find it running well. However, I noticed a little bit of oil dripping down from the front of the Oil pan seal. I tightened the seal up a little bit, and the leak continued. I used Red RTV on the front/corners as well as the rear/corners. After reading up on this, Some people say the RTV IS the problem, and other say I should've used MORE RTV. I torqued the bolts to specs and then slightly over (actually broke one of the front bolts off in the block, will use an easy-out to remove) but would I be better off just tearing the engine out, replacing the oil gasket again and using more/no RTV, or is it feasible to stop the leak (after repairing the broken bolt)?

I am rather upset, especially since I just finished the rebuild and was looking forward to a couple months of having no "serious" problems, but... I would rather go ahead and fix this thing (even if I have to drop the engine again), over having to keep adding oil or putting RTV on the outside of the pan.

I appreciate any insight you guys can offer!
Old Apr 5, 2010 | 07:10 PM
  #2  
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If you tightened a bolt enough to break it, you might have distorted the pan. Did you use the pan rails that go on the outside?

The torque values on the bolts are not that high.

Oil Pan Corner Bolts/Studs 15 lb. ft.
Oil Pan Side Rail Bolts 106 lb. in.
Old Apr 5, 2010 | 07:30 PM
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hdominic's Avatar
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I did use the rails, I have the GM factory manual, and torqued the bolts as spec. When I noticed the leak, i just gave a slight turn to the bolts (barely any) to make sure they did not loosen up from the engine warming up.
I broke the bolt when I chose not to use the torque wrench, the socket was snug against the EGR hose (so I didn't feel the correct pressure) and turned it to much.
So initially, It was done as it was supposed to be done per GM book. Now, I'm sure the gasket is warped/deformed at least slightly.
Old Apr 6, 2010 | 01:06 PM
  #4  
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I would check and make sure it's not the water pump drive seal leaking and running down. They are notorious for this and have to be installed correctly (after) the timing cover is on. Do a search and you will see how. Another problem I have seen is a washer from the old gasket still stuck to the block and causing a leak there. Those blue felpro one piece gaskets are good gaskets and can be re-used.
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