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so my LS1 I noticed leaks about a 2" diameter puddle a week of oil of sitting. I haven't worked on it much in two months as I've been busy this summer with work. the rear main seal, pan gasket and rear cover were all replaced with fel pro products. I followed the guidelines on how to align the cover but I did not use the tool. Just the one that came with the kit on Amazon. What would cause it to leak when parked? I wouldnt think oil level is high enough to cover the crank seal.
Should I just bit e the bullet and pull the tranny to diagnose?
thanks
tony
I thought mine was leaking at the seal. Upon further investigation it was leaking and running down the pan rail and dripping off near the seal due to me forgetting to dab some silicone in the 4 corners where the block meets the front and rear covers…
I thought I seen something about the flywheel to crank bolts Can leak oil if sealer isn’t applied as the holes go into the engine. Not sure if that’s early years or not
I pulled the tranny today. I think I found the issue. One of the rear long oil pan 10mm bolts is leaking through the threads. Can I just put sealant on it? It's weird that it's leaking. I did not find any oil around the cover gasket oil crankshaft gasket. Oh, and I remember now putting extra rtv after I mated the two together. There's also rtv between the pan and rear cover. There was no sealant on the flywheel bolts and they were dry.
The rear 6mm long bolts (10mm head) go into blind holes in the rear main cover. If you're using felrpo pan gasket, the rubber is too thick and hard and will split at the corners when torqued and leak. I recommend GM pan gaskets, no problems. Did you replace the rear cover gasket? It fails like the oil pan gasket when the seal separates from the alum frame.
I have a 2000 LS1 that is leaking oil and my winter project is to find the source. I suspect it is coming from the oil pan but unsure. Suggestions on where to start?
I have a 2000 LS1 that is leaking oil and my winter project is to find the source. I suspect it is coming from the oil pan but unsure. Suggestions on where to start?
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oil leak after installing rear main-while parked 
