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M-Series (M1, M3, M5, M6) General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 10-03-2006, 09:55 AM   #1 (permalink)
Join Date: Oct 2006
Posts: 1
explorer185 is on a distinguished road
New Here Need Help

Hi, new here and was looking for some mechanical help. I've tried researcing but to no avail.
Just picked up a 1989 525i that has an overheating problem. Previous owner replaced the waterpump and fan. I was told that it probably was a head gasket and did some checking into the problem and found that:

- engine overheats and the radiator remains cold.
- I have removed the thermostat and nothing but steam is passing through
the housing.(checked the vent and that's what came out).
- Thermostat opens and closes properly (checked in boiling water)
- there appears to be oil in the radiator but no water in the oil.

I suspect that the leak is on the exhaust side thus the steam. If it was a head gasked problem, I would have thought that some water would get through the engine but there is nothing. Is this possibly also a symptom of a cracked head????

Any thoughts would be appreciated.
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Old 10-15-2006, 09:42 AM   #2 (permalink)
2nd Gear Member
Join Date: Sep 2004
Posts: 358
bad man working is an unknown quantity at this point
Make sure the coolant systems bled properly
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