Need help with oil leak
Thread Starter
Instructor
Joined: Aug 2002
Posts: 220
Likes: 0
From: Boise ID
Need help with oil leak
I have an oil leak that I cannot track down. It is on the bottom of the engine. I do know it is not the drain plug, it is not the rear main seal, it is not from the oil pressure sending unit, and it is not from the timing cover or front seal.
I replaced the lower oil pan gasket, but I still have the leak. If I just let the car idle it does not leak, I have to go for a drive before it will leak.
I have tried one of those UV leak detection kits, did not work.
There is a sensor in the bottom of the pan. Is this the oil temp sensor or the oil level sensor? part number?
I think I will try to replace it unless anyone has any other suggestions.
Thanks!!
I replaced the lower oil pan gasket, but I still have the leak. If I just let the car idle it does not leak, I have to go for a drive before it will leak.
I have tried one of those UV leak detection kits, did not work.
There is a sensor in the bottom of the pan. Is this the oil temp sensor or the oil level sensor? part number?
I think I will try to replace it unless anyone has any other suggestions.
Thanks!!
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
If you let the car set overnight, how may drops of oil will you find on the floor? The oil temp sensor is right above the oil filter and more near the rear area of the pan. There isn't much in the area of the drain plug other than the drain plug itself that could leak oil.
Keep us posted on what you find. There isn't a chance that the oil level is higher than normal is there?
This LINK might help.
Keep us posted on what you find. There isn't a chance that the oil level is higher than normal is there?
This LINK might help.
Last edited by Eric D; Apr 30, 2010 at 10:55 AM.
Pro
Joined: Feb 2009
Posts: 651
Likes: 33
From: North Port Florida
I have an oil leak that I cannot track down. It is on the bottom of the engine. I do know it is not the drain plug, it is not the rear main seal, it is not from the oil pressure sending unit, and it is not from the timing cover or front seal.
I replaced the lower oil pan gasket, but I still have the leak. If I just let the car idle it does not leak, I have to go for a drive before it will leak.
I have tried one of those UV leak detection kits, did not work.
There is a sensor in the bottom of the pan. Is this the oil temp sensor or the oil level sensor? part number?
I think I will try to replace it unless anyone has any other suggestions.
Thanks!!
I replaced the lower oil pan gasket, but I still have the leak. If I just let the car idle it does not leak, I have to go for a drive before it will leak.
I have tried one of those UV leak detection kits, did not work.
There is a sensor in the bottom of the pan. Is this the oil temp sensor or the oil level sensor? part number?
I think I will try to replace it unless anyone has any other suggestions.
Thanks!!
Thread Starter
Instructor
Joined: Aug 2002
Posts: 220
Likes: 0
From: Boise ID
After I drive it, I don’t get drops, I get a small puddle. It only leaks after it is driven.
I have tried 4 times with the UV light. I either get no oil, or I get so much all over the bottom of the pan that I cannot tell where it is coming from.
I will check the PCV and try with the UV again this weekend.
I have tried 4 times with the UV light. I either get no oil, or I get so much all over the bottom of the pan that I cannot tell where it is coming from.
I will check the PCV and try with the UV again this weekend.
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
After I drive it, I don’t get drops, I get a small puddle. It only leaks after it is driven.
I have tried 4 times with the UV light. I either get no oil, or I get so much all over the bottom of the pan that I cannot tell where it is coming from.
I will check the PCV and try with the UV again this weekend.
I have tried 4 times with the UV light. I either get no oil, or I get so much all over the bottom of the pan that I cannot tell where it is coming from.
I will check the PCV and try with the UV again this weekend.
Burning Brakes
Joined: Oct 2004
Posts: 792
Likes: 19
From: ME
I agree with a pcv pressure check. That would best explain the leak that only exists when driving (or extended time above idle). I have to say though I haven't heard much about pcv issues on the LS1 engines.
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