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E34 (1989 - 1995)

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  #1  
Old 08-19-2014, 07:36 PM
Dave95b Dave95b is offline
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Location: Walnut Creek, CA
 
Join Date: Aug 2014
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Mein Auto: 1995 525i sedan
Low temp readings with new radiator

Hey All,

New to the Bimmerfest forum. Very happy to be a BMW owner again (previous owner of an1988 528e and a 1992 325i). I got my 1995 525i sedan a few weeks ago. Last week, I put in a new radiator, coolant level sensor, rad cap, and upper/lower hoses. I went through all the steps in the Bentley manual for installation and bleeding. I rebleed it again and no bubbles!!

My issues are the following: 1) the temp gauge will go anywhere from just above the blue to regular driving temp (middle hash mark) and 2) the coolant level warning message comes on. I check the overflow reservoir and it's at the same level as it was before I start the car. There are no leaks. Any idea on how to resolve the fluctuating temp issue?

I'm wondering if I should just change out the water pump and thermostat. I'm not sure when my Pop changed those out. I'm hearing a noise from around the water pump, but there is no weeping. I'm thinking the bearing may be in the beginning stages of failure.

Thanks, Dave
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  #2  
Old 08-19-2014, 07:55 PM
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E34ZombieHunter E34ZombieHunter is online now
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Location: Lillington NC
 
Join Date: Feb 2013
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Mein Auto: 95 540i B/B
So the temperature goes up and back down?

Check the wiring from the level sensor on the tank, it is very common for the wire to split a little ways down from the sensor if not right at the plug, a simple fix
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  #3  
Old 08-20-2014, 01:09 AM
Dave95b Dave95b is offline
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Location: Walnut Creek, CA
 
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Mein Auto: 1995 525i sedan
Quote:
Originally Posted by E34ZombieHunter View Post
So the temperature goes up and back down?

Check the wiring from the level sensor on the tank, it is very common for the wire to split a little ways down from the sensor if not right at the plug, a simple fix
Zombie Hunter,

When I start the engine the "Coolant Level Owner's Manual" message comes up. Once I put it in gear the message goes away. After driving around and placing it in park, the same message comes up.

For the temperature issue, idling in the driveway the temp will be barely past the blue mark or to a max of the 1/4 hash mark. Driving on flat road in town/freeway, it will be around the 1/4 hash mark. Going uphill it will go up to the 1/2 hash mark, going downhill it will go back to somewhere between the blue mark and 1/4 hash mark. Hope that gives you a better picture.

I'll check the wiring for any splits. I'll check to see if anything got into the connections also.

Thanks,

Dave
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  #4  
Old 08-20-2014, 05:10 AM
Solidlifter Solidlifter is offline
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Location: Maryland
 
Join Date: Oct 2013
Posts: 56
Mein Auto: 90 535i, 95 525it, Q45a,
Seems like your temp gauge fluctuates on and off load. check the wiring as zombie said and check the pump. I am guessing pump, not sure though.
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  #5  
Old 08-20-2014, 06:48 AM
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E34ZombieHunter E34ZombieHunter is online now
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Location: Lillington NC
 
Join Date: Feb 2013
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Mein Auto: 95 540i B/B
I think you may have multiple issues. A car not heating up is a sign of a thermostat stuck open, or missing.
I would check the thermostat, water pump, and the cooling fans.
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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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  #6  
Old 08-20-2014, 12:55 PM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
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Mein Auto: E23;E30;E38;E32;E34 +
+1 on ZH
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E21 318i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
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