overheating e39... radiator or something else? help - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 03-19-2006, 12:39 AM
68th gear and shifting
 
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overheating e39... radiator or something else? help

i'm not sure what's wrong.

today, start the car, drive for 2 minutes, the temp arrow goes all the way to red. Right away i'm thinking radiator failure (i got 99 528 so e39s are notorious for this).

Stop, open the hood, no smoke - nothing

i squized the rubber hose through which water(?) flows (they go to radiator) and they're empty!

then i start the car again, and the temp is back in cold.



also, lately, my car hasn't been warming up at all. It doesn't go above just the end of the cold zone. (before it was always in the midddle of the temp gauge).





can anyone tell me what the problem is??? PLEASE!!!!

can it be thermostat?
or can it be a glitch? but why is there no water in the hose?


not sure what's wrong with the baby but i need to fix it tomorrow


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#2 (permalink) Old 03-19-2006, 02:07 AM
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thermostat is probably siezed closed. thats why little or no return coolant, and why it overheats in a matter of seconds/minute

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#3 (permalink) Old 03-19-2006, 07:27 AM
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I'd go with a messed up thermostat.

I'd also have them flow-test the coolant overflow tank while you're at it if you won't be replacing the thermostat yourself.

Seeing as how you're in my area, you wanna know about a really fantastic independent BMW mechanic around here?



1999 E39 540i/6-VF Stage 1 S/C, Dinan exhaust, Dinan strut+shock braces, Dinan ltwt flywheel + clutch, Dinan Brembo BBK, Dinan monoball, H&R Springs, Koni Yellows, M5 sways, Dinan forged 18" wheels, &c.

1995 E38 740i. Highly modded. Faster than you.

Sold 2-28-07: 1997 E36 M3/4, 8-30-05 RIP 1997 528i


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#4 (permalink) Old 03-19-2006, 11:08 AM
68th gear and shifting
 
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Quote:
Originally Posted by M3UOND
I'd go with a messed up thermostat.

I'd also have them flow-test the coolant overflow tank while you're at it if you won't be replacing the thermostat yourself.

Seeing as how you're in my area, you wanna know about a really fantastic independent BMW mechanic around here?
yup


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#5 (permalink) Old 03-19-2006, 12:42 PM
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coolant temp sensor?

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#6 (permalink) Old 03-19-2006, 02:34 PM
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Quote:
Originally Posted by superdeadman
yup
The guy's name is Reese Sherbaf. His business is:

Fairfax Service Center
2850 Prosperity Ave., Fairfax, 22031
http://www.fairfaxservicecenter.com/
703.560.1700

He also happens to be an authorized Dinan installer. He's been in business since 1978. He's treated me very, very well, both with the 528 I had and with my M3. He's a wizard with cooling system problems. Let him know I sent ya :-)



1999 E39 540i/6-VF Stage 1 S/C, Dinan exhaust, Dinan strut+shock braces, Dinan ltwt flywheel + clutch, Dinan Brembo BBK, Dinan monoball, H&R Springs, Koni Yellows, M5 sways, Dinan forged 18" wheels, &c.

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#7 (permalink) Old 03-19-2006, 03:20 PM
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I'd say it's the thermostat from your description, but yeah, take it to the mechanic M3UOND recommended.

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#8 (permalink) Old 03-19-2006, 05:23 PM
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just overhaul the coolinmg system, I did that on my e36, it was like 300 bucks without labor, and since i did it the labor was free, i got a new radiator, hoses, pump, thermostat, and housing allong with coolant and it works great, I did mine as more of a precationarry measure cause i have 100k on my car. Thermostat sounds right as far as the diagnostic goes, or your water pump falled either one.



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