Leaking oil, how to fix it?

Tiny
CP313
  • MEMBER
  • 2002 BUICK CENTURY
  • 144,000 MILES
My car listed above with a 3.1 liter is leaking oil here, any idea what this is where's it's leaking from and how to fix it?
Tuesday, April 11th, 2023 AT 7:38 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,310 POSTS
Hi, and welcome back.

The first thing we need to determine is where it is coming from. It appears to be a creamy tan color. Is that correct? If so, we have coolant mixed with it.

So, the most common place where oil and coolant can leak from on this engine is the intake manifold. They have a history of leaking. So, that is where I'm going to recommend starting to check.

There is an upper and lower intake manifold on this engine. I attached a pic below showing the lower one. You don't need to take anything apart, but I need you to inspect the top (as best as you can see) of the manifold for coolant or oil.

Also, if you follow the manifold where it attaches, check for the same thing. Note that the manifold runs up to the valve covers, so there could also be a leak coming from there as well.

Let me know what you find.

Take care,

Joe

See pic below.
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Wednesday, April 12th, 2023 AT 8:41 PM

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