Oil Leak
Thread Starter
On The Tree
Joined: Aug 2011
Posts: 106
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Oil Leak I have oil leaks on my ls1. One is right under the throttle body, where the intake meets the valley cover. I also have one where the engine meets the tranny on the bottom of the car. I want to get rid of the leaks so how should I pinpoint the leaks. I have a feeling one is the rear main seal and the other the valley gasket. What do you guys think?
TECH Enthusiast
Joined: Jun 2011
Posts: 589
Likes: 2
Lol well at least urs isint as bad as mine... I go through half a court of oil a week between blow by, oil pan leak, and rear main seal leak... My solution was start all over and just get a new engine lol good luck with urs wish I could help but I haven't even fixed mine yet.
Check your oil pressure sender. Unplug it and see if the connection is oily. Its pretty easy to replace without pulling the intake if you have the special socket and dont have gorilla hands.
IF you have oil under your throttle body, the first thing you need to look at is the PCV hose that goes into it, That should be the only way oil is getting up to that part of the engine,,GET A CATCH CAN, that will help keep oil out of your intake.
If you suspect the rear main, put the car up on stands, and remove the inspection cover, take a good bright light, and look up at the rear main, if you see any oil above it, then the leak is coming from up top, valley cover gasket, oil pressure sender, busted PCV hose. If the oil is only below the seal then its leaking. If you see oil on the sides of the cover right where the pan meets, then look up higher on the engine, if oil is running down its coming from the valve cover, or filter housing, or bypass cap, if not and its just around where the pan meets the block then it is the pan gasket. Hope this helps
If you suspect the rear main, put the car up on stands, and remove the inspection cover, take a good bright light, and look up at the rear main, if you see any oil above it, then the leak is coming from up top, valley cover gasket, oil pressure sender, busted PCV hose. If the oil is only below the seal then its leaking. If you see oil on the sides of the cover right where the pan meets, then look up higher on the engine, if oil is running down its coming from the valve cover, or filter housing, or bypass cap, if not and its just around where the pan meets the block then it is the pan gasket. Hope this helps
