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E34 (1989 - 1995)

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  #1  
Old 07-25-2014, 05:08 PM
Figless525 Figless525 is offline
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leaking coolan

Hi this is my first post. I have a 92 525i and was wondering what would cause my coolant to leak but my engine to not overheat. i find it strange, cause the coolant tank will be empty but it wont overheat. I just replaced my T-stat and T-stat housing and I'm seeing coolant all over my fan and the radiator hoses but it doesn't overheat. Any clues would be helpful thanks.
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  #2  
Old 07-25-2014, 05:25 PM
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sea6speed sea6speed is offline
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The car won't overheat just because coolant is low, to a point. Clean up the area where it's leaking as much as possible, top off your coolant and run the car for a while and see exactly where it's coming from.


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  #3  
Old 07-25-2014, 05:46 PM
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E34ZombieHunter E34ZombieHunter is offline
Nothin like an E34
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Quote:
Originally Posted by sea6speed View Post
The car won't overheat just because coolant is low, to a point. Clean up the area where it's leaking as much as possible, top off your coolant and run the car for a while and see exactly where it's coming from.


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Exactly, if you do not add coolant when it is low it will overheat eventually, check the area very well, you could have a gasket gone, cracked thermostat housing......etc
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  #4  
Old 07-25-2014, 11:16 PM
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BMWFatherFigure BMWFatherFigure is offline
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Try to borrow a cooling system pressure test unit. Then you can check for leaks without running the engine.
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  #5  
Old 07-26-2014, 05:03 PM
Figless525 Figless525 is offline
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thanks, but do you think my t-stat housing could crack that quick since i just bought it and put it on?
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  #6  
Old 07-26-2014, 05:53 PM
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E34ZombieHunter E34ZombieHunter is offline
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If you did not put it on correctly, or the t-stat slipped out of place when it was tightened it could easily be cracked.
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  #7  
Old 07-28-2014, 08:49 AM
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BMWFatherFigure BMWFatherFigure is offline
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+1 on E34ZH. Many people do not take real care in fitting parts. Clean off all the old gasket and goo; clean the threads; dry fit the parts. The list is large even for 'simple' parts. BMWs seem most sensitive to 'just bash it on' engineering.
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  #8  
Old 07-30-2014, 01:40 PM
Figless525 Figless525 is offline
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I took my time cleaning the area where the housing goes. It was so nasty and the gasket on the old housing was non existent. Had to take a razor blade and steel wool to it. I put rtv black sealant on it before I bolted it back on and put the t-stat in with the arrow pointing up.
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  #9  
Old 07-30-2014, 03:06 PM
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E34ZombieHunter E34ZombieHunter is offline
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BUT, the t-stat could have slipped and when you bolt down the t-stat housing it gets wedged and cracks the hosing, make sure this did not happen. Or a hose down there make be leaking from being disturbed.
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Gotta love an E34!!
If you want to get junkyard parts remember one thing, if it was wrecked you know it was running/driving. You may not know how well, but it was.

READ THE STICKIES AT THE TOP OF THE PAGE!!

STOMP TEST

READ ME IM THE BIBLE

FAN CLUTCH

LOCKS

ANGEL EYES
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