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