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5 Series DIY
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  #1  
Old 02-24-2014, 01:25 AM
MY90E34 MY90E34 is offline
MY 90 E34-M20
Location: Riverside, CA
 
Join Date: Feb 2014
Posts: 2
Mein Auto: 1990 525i (E34, M20)
Head gasket replacement.

I recently bought an E34 with what I thought was just a head gasket problem but I seem to have oil leaking down the passenger side of the block from what looks like the head gasket. There is no oil in the water and no water in the oil but most the oil pumps out through the side of the seal. There r no visible cracks in either the block or the head so I'm hoping a head gasket will fix this. I have bought the head gasket set plus head bolts, timing belt and exhaust nuts. I replaced the oil pan gasket and the valve cover gasket thinking that that was what was leaking but come to find out its leaking from the head area. The car has got hot to the point of shutting its self off two or three times I'm embarrassed to say. I have never worked on these cars before and the only reason I have this one is because I got it for 250. And it was still running ( really long story ). My question is, has anyone experienced this and what was the damage done and since mine still runs is she fixable and what do I have to do. I'm going to have a whole lot more questions as I go along too. Got a friend with a 99 550i wants me to do work on his car too.


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  #2  
Old 03-01-2014, 04:04 AM
jmy60 jmy60 is offline
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Location: Melbourne
 
Join Date: Feb 2014
Posts: 5
Mein Auto: Saab 9000 aero
Oil lead from cyl head

Did you notice how high the temp gauge rose when it got hot? The passenger side of the engine will normally run a bit hotter because of the close proximity of the exhaust manifold. Hence the gasket is under greater potential to leak from high temp...esp if your engine got too hot. And sometimes the head gasket will hold along the water gallery but break through an oil gallery between the block and the head. I had a Subaru do this - quite common.
Might be worth doing a compression test first before you pull the head to see if the piston compression rings have lost their tension from engine overheat. Not sure what the spec is for your engine compression but readings should be fairly even along all the cylinders. If your compression is considerably low (even in 1 cyl then you might have an engine rebuild on your hands...ie not just replace head gasket.
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  #3  
Old 03-04-2014, 03:00 PM
MY90E34 MY90E34 is offline
MY 90 E34-M20
Location: Riverside, CA
 
Join Date: Feb 2014
Posts: 2
Mein Auto: 1990 525i (E34, M20)
Thank u for replying. It's been so hard to get help with this. The temp got so hot that the car turned itself off three times. I try to run it as little as possible but now its starting to put some white smoke out of the tail pipe and doesn't want to stay running. I'm trying to do the compression check but I have the old tool that takes two people to do. I'll check in with u with the numbers I pull off the engine so we can go from there. Thanks again for helping me


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