white smoke

[cj1995]

Just bought a 95' 530i. Was missing slightly when I bought it. Changed the plugs and it ran fine for a few minutes, then started blowig thick white smoke, and missing at ide, and clearing up wen revved up. I'm thinking blown head gasket. It also had a coolant leak when I bought it. I figure the previous owner overheated it, thus blowing the head gasket. I'm new to the bimmers, so is there anything else that would cause this issue?
Thanks in advance!

[sktn77a]

Could be. First of all, check the CCV that can cause similar problems (and is a cheaper fix than a new head). The E34 V8s had a lot of problems with the block, too.

[cj1995]

what is a CCV? And how and where do I / can I check it?
Thanks

[sktn77a]

Crank Case Ventillation valve (BMW's unnecessarily complicated and expensive EGR valve)!

[ZenitramNaes]

Did you check under the valve cover for evidence of radiator fluid? If yes it's clear your HG is blown.


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[cj1995]

I didn't pull the valve covers. There is nothing on the oil cap or in the anti-freeze. It's just missing at idle and blowing thick white smoke. It smooths out when I rev it up, but after 20 mins, it is still blowing thick white smoke. I'm thinking the HG is blown between cylinder and water jacket. Parts alone are $400, not to mention the labor.And that don't include replacing a head if needed. I can get a motor for $600, and it would cost me another $50 for oil, filter, and anti-freeze, plus $300 to install it. Haven't got a price on labor for doing HG's yet. Thought I got a deal, guess not.

[ZenitramNaes]

There is a really detailed thread on how to replace a head gasket on an m30 over at bimmer forums. I would post the link but I'm on my phone.


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[cj1995]

I beleive mine is the M60 V8 motor.

[ZenitramNaes]

Oh sorry about that. Damn iPhone app doesn't tell me what section I'm in.


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[rajendersingh90]

could be the problem related to carborators.. it could be out fo service from its functions

[cj1995]

It's TBI. No carbs.

[rivroshaun951]

Don't know if it's to late but another problem that is overlooked a lot is incomplete combustion can cause white smoke. Normally really thick white smoke Is incomplete combustion and a foggy kind of white is coolant being burned. First start with the coolant level. Is it low? If yes head towards blown head gasket. Try performing a pressure test on your coolant system this test can help you narrow down to a blown gasket. Incomplete combustion can be caused from multiple issues, for example incorrect timing, Bad Fuel, Compression problems, ignition problems, etc. etc.