Oil leak! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-15-2007, 10:18 PM   #1
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Default Oil leak!

O.K. so I have an oil leak and a pretty bad one. I searched the previous topics and couldn't really get the info I needed. The oil is coming from the front passenger side. I just changed my oil and there was only about 2 quarts in it. I checked the filter, the pan and all the bolts. Am I looking at a maybe the front main seal? If so, how extensive is the work? Keep in mind I'm not a mechanic. I also noticed before I changed my oil that my rpm was dropping will sitting still. After I changed my oil it stopped.
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Old 01-15-2007, 10:28 PM   #2
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You mixed your terms there. There'* the front seal, then the rear main seal. The front seal is on the passenger side, and the rear main is on the driver'* side.

Is your oil pan coated in oil? How about the oil filter? Was the drain plug leaking?

We need to know exactly where it'* dripping from. It sounds like the oil filter, based on the description.
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Old 01-15-2007, 10:43 PM   #3
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If there is a lot of sludge down there, hose it all off real good. Then it will be easier to see where it is coming from. Isn't there a some what common problem with the oil filter lines leaking?
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Old 01-15-2007, 11:26 PM   #4
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I'd be suspicious of the timing cover gasket. Sometimes a small piece of that paper gasket will break and push out of there, resulting in a leak that will increase with rpm'*.
I'd also look at your oil sending unit.
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Old 01-15-2007, 11:43 PM   #5
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The oil pressure sender is also in that area. Like Logan said you need clean everything so you can find the leak.
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Old 01-16-2007, 06:31 PM   #6
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I put a piece of clean cardboard under the passenger side today and left it for the eight hours I was at work. There was a small puddle about a foot from the passenger side front wheel. There was quite a mess so it was hard to tell exactly where it was coming from. I could tell that it wasn't the filter itself. I will get under there and try to clean it off. Brrrrrr.....cold.

No, the oil pan doesn't have a bit of oil on it.
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Old 01-16-2007, 06:35 PM   #7
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That does sound a lot like the oil pressure sending unit..

Have a good look around..

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Old 01-19-2007, 07:06 PM   #8
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I found it, well actually my boyfriend found it then asked me what it was. The majority rules..........oil pressure sending unit is the winner! So, it didn't look that tough to get to but anyone have any advice?
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Old 01-19-2007, 07:47 PM   #9
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Pretty easy to change it out it by removing the RF wheel.
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Old 01-19-2007, 08:59 PM   #10
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Like BB says..

Pull RF wheel.. remove splash guard and it'* right there.
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