Radiator Problems With My E34--help!! - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 11-02-2004, 11:24 AM
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I've recently bought a 1990 E34 and every now and then the coolant fluid starts to spill out through the cap...the first time this happened I though it was just that I left the cap lossened, but it keeps happening over and over again. Why does this happen? can somebody help me out?

thanks..
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#2 (permalink) Old 11-02-2004, 04:33 PM
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BAD CAP may be?
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#3 (permalink) Old 11-02-2004, 04:45 PM
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maybe you have too much coolant in there.... when the coolants/hoses are cold to touch your coolant level (in the expansion tank under cap) is suposed to be up to KALT (cold)...
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when coolant heats up it expands and the cap is made so it opens up a bit to release excess amounts (if you have too much in there to begin with)

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#4 (permalink) Old 11-02-2004, 04:52 PM
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JOHNBMW:but it keeps happening over and over again

As such how much excess coolant the car has?
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#5 (permalink) Old 11-03-2004, 07:47 PM
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what kind of e-34 (m20.m30-m50 w/o vanos). is the car overheating, coolant look brown, like stop leak?? start the car cold w/ the cap off, & rev it up, does the coolant circulate in the tank, got heat..come on man give me some help.
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#6 (permalink) Old 11-04-2004, 12:53 AM
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Maybe you should get a new cap, doesn't cost much.
I had a 95 E34 which had a recall on the radiator cap.

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