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BMW E36 3 Series 1992-1998 (318i/s/ti, 320i, 323i, 325i/s, 328i/s, M3, conv) BMW e36 1997 318i overheating problem


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Last Post: Oct 19, 2009 4:25 PM Last Post By: fixiturself
bme36

Posts: 1
Registered: 10/06/08
BMW e36 1997 318i overheating problem
Posted: Oct 6, 2008 6:05 AM
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my car started suddenly overheating , it started when i check the water in the radiator & it was empty and i filled it to the top , and then after driving for 2 hours it get overheated to the max , then the next day it started to overheat after driving for just 10 mints , i changed the water pump & i moved the thermostat and i check the fan it was fine , the oil is very good & it dosnt blow smoke but i have got bubbles when the car is on & the rad cap is open , i realise that after i drive it and it get overheat the hose that coming from engine to the rad it very hot & full of pressure its like gona blow up , can any one tell me what the problem could be ?
Charlie

Posts: 4,776
Registered: 12/09/03
Re: BMW e36 1997 318i overheating problem
Posted: Oct 6, 2008 10:13 AM   in response to: bme36 in response to: bme36
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You need to make sure the coolant is circulating. Do you have heat in the passenger compartment? If not, you likely have trapped air and the coolant is not circulating. In tough situations I have used a pressure tester to force the coolant through. Apply pressure to the system with the bleed open and the engine running. This can be done by most repair professionals at the reasonable cost, assuming you can drive the car to someone.
cbr600rrr

Posts: 17
Registered: 08/09/08
Re: BMW e36 1997 318i overheating problem
Posted: Oct 6, 2008 3:52 PM   in response to: Charlie in response to: Charlie
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air lock.defo. there a **** 2 bleed straight 6 r even worse
fixiturself

Posts: 17
Registered: 01/10/09
Re: BMW e36 1997 318i overheating problem
Posted: Oct 17, 2009 3:19 PM   in response to: Charlie in response to: Charlie
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Hi charlie...still having a problem with overheating. Will the car overheat if the heater valve doesn't open? I know it does stick...have tapped on it and got heat after.

I've changed the water pump, thermostat, clutch fan and radiator....it's better but not fixed yet....any other ideas?
Charlie

Posts: 4,776
Registered: 12/09/03
Re: BMW e36 1997 318i overheating problem
Posted: Oct 19, 2009 3:40 PM   in response to: fixiturself in response to: fixiturself
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You should have the system pressure tested. This will tell you a lot. Car will not o.h. if the heater valve does not open. Do you have heat and it still over heats? Does it use/burn coolant. It is driveable? Suspect the head gasket :(
fixiturself

Posts: 17
Registered: 01/10/09
Re: BMW e36 1997 318i overheating problem
Posted: Oct 19, 2009 4:25 PM   in response to: Charlie in response to: Charlie
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Thanks I solved the problem...I either read it here or on some other website.....but I filled the exspansion tank and took out the bleeder screw on it and got all the air out and so far the gauge hasn't moved past the middle....I think that was my problem in the first place...ooops $900 later

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