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E34 (1989 - 1995)

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Old 10-03-2005, 05:38 PM
RickR535i RickR535i is offline
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Location: Tennessee
 
Join Date: Oct 2005
Posts: 49
Mein Auto: 1990 535i/ 2002 530i
Question Cooling system pressure

What is the max pressure in a 535i cooling system?

My cap lets off pressure at 34#s. That seemed excessive so I dismantled the thermostat and cut off some of the spring to reduce max pressure to 14#s.

Well that was a mistake. "The Boss" called from the interstate when the car boiled off the coolant and the temp went up.

This is a HIGH milage car (270,000) and I am sure there are head gasket issues. Car normally does not overheat but hoses get very firm. I am also having coolant seeping problems around the hose connections (Orange lifetime antifreeze)

THANKS!
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