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Common Places For Oil Leak


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Part of what you may be encountering is that the engine is old, and other people may have done work on it, and may have not done it correctly, so it can be leaking from almost anywhere - the list of places is fairly long.  I think the only unusual one is the exhaust studs.  But it is sort of like asking "I have a roof on my house that is 50 years old and leaks, where could it be coming from".  Answer - a lot of places.

 

Good luck on the sealing and healing.  

 

Scott

02ing since '87

'72 tii Euro  //  '21 330i x //  '14 BMW X5  //  '12 VW Jetta GLI

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On ‎3‎/‎8‎/‎2017 at 9:48 AM, fuzzyhead said:

I have a serious oil leak issue as well. It's been leaking a bit for a few years. Now it's out of control. 

 

Oil is all all over the exhaust downpipe, the bottom of the engine, the top of the valve cover near cylinder #4, and the distributor. 

Sounds exactly like a distributor flange leak.  Throw in a distributor o-ring as well.

 

You may have more than one thing going on at the same time.

Edited by Healey3000
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I seem to remember BMW selling the wrong stubs for the exhaust at some stage, I think they were e21 and were marginally smaller, I had the same issue 20 odd years ago, no matter what I did they didn't stop leaking, Mike at Jaymic explained it and I got new correct studs from Jaymic and it was sorted, I'm sure I've read this somewhere before as well. Too many beers to search now??

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11 hours ago, fuzzyhead said:

Yeah it appears I do. I think I'm going to remove the exhaust manifold. Clean the studs, put something like permatex or hondabond on them and see if that fixes the leak.

.

You'll need to use a thread locker like loc-tight blue on the studs to prevent them from backing out due to the heat and vibration in that area Permatex and Hondabond are great gasket sealers but as far as I know don't have any thread locking ability. It's just the upper studs that penetrate into the head to and when you pull the old studs you'll need to stuff a rag between the valve spring and the head to prevent oil seeping out when you clean the thread with a solvent like brake-clean and don't forget to degrease your new studs before applying the thread locker. 

If everybody in the room is thinking the same thing, then someone is not thinking.

 

George S Patton 

Planning the Normandy Break out 1944

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