Just got my 93 325i and i had a huge problem a week after i got it. First the Coolant recovery tank exploded on it and i replaced it with a new unit from BMW. Then the car started overheating like crazy, never let it hit the red and stopped for it to cool down. So i dug further and ended up replacing the thermostat, the old one came out in 5 peices it was trashed. Still the problem persisted this time it blew a hose back on the fire wall at the heater control valve. Replaced the heater control valve with yet another new one from BMW. So far a replaced recovery tank, thermostat and heater control valve. I have bled the system for air properly and still the car will over heat, i am lost on this one, any ideas? The head gasket is fine and there are no visible leaks anywhere on the motor!
Just got my 93 325i and i had a huge problem a week after i got it. First the Coolant recovery tank exploded on it and i replaced it with a new unit from BMW. Then the car started overheating like crazy, never let it hit the red and stopped for it to cool down. So i dug further and ended up replacing the thermostat, the old one came out in 5 peices it was trashed. Still the problem persisted this time it blew a hose back on the fire wall at the heater control valve. Replaced the heater control valve with yet another new one from BMW. So far a replaced recovery tank, thermostat and heater control valve. I have bled the system for air properly and still the car will over heat, i am lost on this one, any ideas? The head gasket is fine and there are no visible leaks anywhere on the motor!
when you just leave the car running does your fan come on after a while? the one that comes out of your waterpump? it always spins but when it gets hot it should spin much faster.
welli think we figured it out, after many exhausting hours of trouble shooting and testing, the problem was an air pocket in the system that we were unable to get during conventional bleeding of the cooling system, so we solved the problem by vacuming the system and it seems to be running fine now, no more overheating, no more pressure, just smooth running as it should be. Thanx for all of the suggestions and it was helpful.
hi tony, my name is juan \ i have the exact problem , expantion tank explote , i did replace my termosthat was bad ,thats why blow my tank out, new coolant , bleeding also , still overheating....how you vacuum the system ?, please let me know
Bleeding the air on an E36 is notoriously difficult.
The last time I did it it took about 4 hours, jacking up different corners of the car in turn to move the air pockets along. Wish I'd have read your post earlier!
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
BMW Werkz
668.8K posts
97.6K members
Since 2003
A forum community dedicated to all BMW owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more for your favorite models!