Smoke from engine bay, can't seem to figure it out!

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Oct 11, 2019 | 09:47 PM

jaguarguy13

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Joined: Apr 2014

Posts: 75

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From: Michigan

Smoke from engine bay, can't seem to figure it out!

Hey everyone!

I used to burn oil through the exhaust, I replaced the exhaust valve stem seals and that problem is now gone. Now it seems like I'm burning oil somewhere down by the first cat in the engine bay. Constant smoke comes from the engine bay when the car gets up to temp. It isn't the valve cover seal, I made sure of that. Could it be that the head wasn't tightened down or something?

I honestly have no idea where the leak is coming from, and I'll try to pinpoint the source sometime this weekend. Maybe the head gasket didn't seat right and is letting oil into the cylinders, but I don't think so because the tailpipe is completely clean a burning oil smoke!

I've been at Uni, and finally have the time now to finish the car up again!

Last edited by jaguarguy13; Oct 11, 2019 at 09:49 PM.

Oct 15, 2019 | 06:38 PM

Don B

Joined: Feb 2014

Posts: 20,500

Likes: 15,276

From: Crossroads of America

Quote:

Originally Posted by jaguarguy13

Now it seems like I'm burning oil somewhere down by the first cat in the engine bay. Constant smoke comes from the engine bay when the car gets up to temp. It isn't the valve cover seal, I made sure of that. Could it be that the head wasn't tightened down or something?

Hi jaguarguy13,

A common source of oil leaks are the two rubber "half-moon" seals at the rear end of the cylinder head. When one or both of these leak, oil drips down the right side of the bellhousing and onto the exhaust pipe. When you replaced the valve cover seal did you also replace these half-moons and install them with RTV silicone sealant per Haynes or the Workshop Manual?

Cheers,

Don