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Guest Anonymous

Help with where this oil leak might be coming from?

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Guest Anonymous

In the past couple weeks my car has developed an oil leak on the exhaust side of the engine. When I'm sitting at lights and the like, oil smoke can be seen drifting out from the upper hood vents that rest against the windshield. The oil is burning off and smoking due to it hitting the hot headers, but I cant quite seem to pinpoint a cause. I was thinking it might be something weird, like one of the studs from the header backing out a bit from the block, allowing some oil to seep through, but I don't think that would be it. Other than that, I can't quite determine where a possible leak might be coming from. The valve cover gasket is good, and I would imagine that if the head-gasket went, it would be more coolant related smoke. Anybody have any experience with this sort of problem? Thanks for any help

-Will

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. . . . "I was thinking it might be something weird, like one of the studs from the header backing out a bit from the block, allowing some oil to seep through, but I don't think that would be it. ? "

THINK AGAIN

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Guest Anonymous

Why, are they sealed from within?

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Oil can & will seep from the studs. Lift the valve cover, you will see that no oil is escaping past the gasket. If you do, problem solved. (most likely not).

I had the same thing. Your studs are leaking and dripping on the headers just, as mine were. It is only a drop at a time but when it burns on the hot header it looks as if you have a major leak.

I didn’t have a heat shield for my plug wires but since the studs were weeping, I replaced all of them and put the proper heat shield on and problem solved….

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Will,

remove the exhaust manifold,

all 8 exhaust studs,

clean the holes dry till your sister would lick it,

install NEW studs with BLUE 242 Loctite thread locker,

resurface your crusty exhaust manifold gasket surface,

install the 'improved' 320i 1-piece ex. manifold gasket with shield,

NEW self locking copper ex. stud nuts with flat washers to spread the load,

Bob's yer Uncle.

enjoy the poster

VINTAGEBMWPOSTER5.jpg

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Counterinturitively, it's the top studs that are open to the

inside of the head. To make matters worse, they usually form pockets

where the threads break free into the crankcase.

So with each start- stop cycle, an 8mm by about 6mm cylinder of

oil's allowed to leak out onto the manifold.

I usually just pull the worst offender, clean it as best I can, and then

I've had best luck with silicone sealant. Loctite has leaked on me in the past,

even with a fresh head and new studs.

fwiw,

t

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