M50B25
I've got plenty of white smoke under load and a very small amount of mayo around the oil filler cap.
No noticable oil in coolant or water in oil. I think the small amount of mayo is from blow-by.
Engine hasn't overheated.
On this engine is it likely to be cracked cylinder head or just a gasket?
Blown head gasket or cylinder head crack?
Moderator: martauto
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DanThe
- E30 Zone Team Member

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Cracked head is more common than gasket, is it using coolant?
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capri_rob
- Married to the E30 Zone

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How often do you use the car ?
If its irregular use and short journeys you can get a buildup of mayo from that.
If the white smoke is there all the time though does sound like you have a potential issue.
If its irregular use and short journeys you can get a buildup of mayo from that.
If the white smoke is there all the time though does sound like you have a potential issue.

e30topless said : Proper BMW's have 4 headlights, last of the run was the E30 and E34/E32 anything after that is just complete shite
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gudgeon
- E30 Zone Regular

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I'm pretty sure it's a problem.
I guess my real question is, are cylinder head cracks common compared to blown gaskets?
I guess my real question is, are cylinder head cracks common compared to blown gaskets?
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gudgeon
- E30 Zone Regular

- Posts: 475
- Joined: Sun Jan 27, 2008 11:00 pm
- Location: Didcot
An update on this, problem was very odd as I never saw oil in coolant, bubbles in coolant, coolant in oil.
However, the fuel tank was very low and had been for a long time (I don't use the car at the moment), when I topped up with 10 litres the problem went away. I'm pretty sure this was a water in the fuel tank issue, apparently not enough to cause misfire, but enough to cause noticable vapour.
Anyone think this sounds likely?
However, the fuel tank was very low and had been for a long time (I don't use the car at the moment), when I topped up with 10 litres the problem went away. I'm pretty sure this was a water in the fuel tank issue, apparently not enough to cause misfire, but enough to cause noticable vapour.
Anyone think this sounds likely?
