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Re: Overheating at idle.. Help. (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by craigwatanabe on June 04, 2001 at 03:15:17:

In Reply to: Overheating at idle.. Help. posted by Steph on June 03, 2001 at 19:28:38:

Check your radiator cap. My 535i did the same thing and it got to the point where I would stay off the freeway during rush hour to avoid the long hot idling periods. If your radiator cap's spring is deteriorating, it may not be able to raise the radiator's pressure high enough to keep the coolant from boiling over. Many people overlook this somewhat simple cure for an overheated engine. Caps do fail.

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