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Re: E34 Coolant Loss (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Bahr on August 30, 2001 at 19:05:16:

In Reply to: E34 Coolant Loss posted by Andrew on August 30, 2001 at 15:46:29:

Check your HEATER CONTROLL VALVE.....
On a 535 it is driver side corner near firewall
with a black pinned cover over it....
Gaskets wear, etc.... Mine is leaking again ,about a qt every 2 days, and I will replace it with a new part one....Not difficult to replace if you've seen it done before..

Bahr
89 535i
Having problem with coolant leaking from system on ’92 525i Touring. No hydro-carbons/bubbles/oil detectable in radiator after two tests. Leak-down test done twice – no problem found. No moisture/coolant detectable in exhaust gasses. Very slight staining on one edge of head (between head and block) but general opinion is that this is not coolant. Never smells of coolant. Etc. Been in dealer several times to do tests but unable to find/fix problem. Rest of system seems to be OK. Steadily looses about one quart or so, (enough to get a low coolant light) each 500 to 700 miles.

Is there a high quality “Leak Stop” type product that may be appropriate? I have heard of some in the past.

Any wisdom on this would be appreciated.




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