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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 02-11-2013, 06:46 PM
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AndrewZ AndrewZ is offline
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Mein Auto: It has two dipsticks
Slight Overheating

Two days ago we did the timing belt, water pump, fan clutch, and thermostat and a few hoses. Car was running fine till today. The temp gauge goes up to 3/4's and then the electric fan kicks in and keeps the temp down.

Am I possibly looking at bad radiator? No leaks, coolant level seems fine. It only does this at stop lights.

Thanks in advance
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  #2  
Old 02-11-2013, 07:18 PM
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hornhospital hornhospital is offline
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Your fan clutch is shot. New? That definitely is the symptom of a non functioning fan clutch. Test it.
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Last edited by hornhospital; 02-11-2013 at 07:19 PM.
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  #3  
Old 02-11-2013, 07:51 PM
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BMWFatherFigure BMWFatherFigure is offline
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Thermostat not opening fully; part blocked radiator; air in coolant.
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  #4  
Old 02-11-2013, 08:04 PM
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hornhospital hornhospital is offline
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Quote:
Originally Posted by The_Raven View Post
It only does this at stop lights.
^This is the give-away that it's the fan clutch. If it were a stuck thermostat or blocked radiator it would overheat regardless of speed.
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  #5  
Old 02-11-2013, 08:36 PM
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BMWFatherFigure BMWFatherFigure is offline
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OP says 'did...fan clutch' I guessed he meant new. Maybe I misread.
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  #6  
Old 02-11-2013, 09:22 PM
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hornhospital hornhospital is offline
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Yeah, I read that, too, but there's very little chance it's anything but the clutch judging from the symptom. Not disagreeing with you.
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  #7  
Old 02-11-2013, 11:55 PM
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BMWFatherFigure BMWFatherFigure is offline
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No prob HH, I guess we will just have to wait and see..................
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  #8  
Old 02-12-2013, 05:29 PM
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Mein Auto: It has two dipsticks
Yes, fan clutch is brand new along with the thermostat.
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  #9  
Old 02-12-2013, 11:56 PM
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BMWFatherFigure BMWFatherFigure is offline
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Radiator or air in the system is my guess.
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  #10  
Old 02-13-2013, 11:21 AM
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Mein Auto: It has two dipsticks
I'll try to bleed the system again and go from there.
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  #11  
Old 02-13-2013, 06:30 PM
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BMWFatherFigure BMWFatherFigure is offline
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Do it with the heater on full heat - fast fan speed. Are you sure about the radiator?
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  #12  
Old 02-14-2013, 10:14 PM
markseven markseven is offline
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Andrew, if the fan clutch was not stored in the upright position it can malfunction or wear prematurely... Where did you source the FC?
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  #13  
Old 02-15-2013, 11:21 PM
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cmac2012 cmac2012 is offline
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Not sure what your boneyard scene is like but out here I'd find a decent looking used fan clutch, put it on, and if it made no difference take it back for credit. If it makes a difference, points to the problem. Of course it could be a defective unit also.
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  #14  
Old 02-17-2013, 06:28 AM
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Mein Auto: It has two dipsticks
Quote:
Originally Posted by markseven View Post
Andrew, if the fan clutch was not stored in the upright position it can malfunction or wear prematurely... Where did you source the FC?
BMA in Glendale. I bleed the system again yesterday, and so far it's been fine but I haven't really been at any stop lights. Today will be the test on my way home from work.
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  #15  
Old 02-26-2013, 08:58 AM
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Mein Auto: It has two dipsticks
Well, it still was overheating after my last post so I bought a new temp sensor that goes on the thermostat housing and finally it has stopped overheating. For the past week, the needle stays between a quarter and half.
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  #16  
Old 02-26-2013, 11:09 AM
7pilot 7pilot is offline
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Quote:
Originally Posted by AndrewZ View Post
Well, it still was overheating after my last post so I bought a new temp sensor that goes on the thermostat housing and finally it has stopped overheating. For the past week, the needle stays between a quarter and half.
Sounds like you changed the temp gauge sender, but the coolant circuit finally burped the trapped air.

m
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