Overheating e34 - BMW Forum

d3ity · 06-30-2007, 11:13 AM

Hey guys, my e34 is running into a bit of trouble with overheating.

I've seen this problem before. I was running my car on a hot day (94*F+) on the highway (so probably driving faster than i should have)...

Disaster struck. My car starts overheating. I pulled over and ordered the parts I needed when I got the car home finally.

Right now I've got a cracked/spiderwebbed coolant expansion tank. I've done this job before... but i'm running into some trouble. The coolant expansion tank will simply not come out. I've poked at it with all sorts of screwdrivers and tried to simply pull it out. Is there some sort of trick I'm missing? I would have consulted my service manual, unfortunatley, the book is in two halves right now, and I have the wrong half of it.

Anyone able to help? Or should I just attempt to brute force the thing out?

cnn · 07-01-2007, 12:12 AM

BMW DIY (Do It Yourself)
E36 is the counterpart of E34 and this is similar.

Did you look into realoem.com?
Here is the link:
RealOEM.COM * BMW E34 525i RADIATOR

d3ity · 07-01-2007, 11:22 AM

That's exactly what I needed, thanks!

I managed to get the coolant expansion tank replaced last night. So I at least managed to get to work this morning. I did however still recieve the 3F fault code, indicating a problem with the thermostat. The hose leading from the thermostat towards the expansion tank was hot, however on the other side it remained cold. I'm not sure if that indicates that it is stuck open or closed, however, it's stuck somehow... I won't be able to try this procedure until I get paid on thursday and make it down to Daniels or Jeff's to pick up some BMW coolant. I'm only going to use the car for absolutley nessacary trips until then and keep the heat on full blast to try and avoid overheating.

Thanks again though, I'll make sure I bookmark that page. It looks like it has some very very useful information.

anthon · 07-07-2007, 03:45 AM

That’s a very useful site.

I just wonder if also applies with Mercedes vehicles, since that’s the problem of my cousin right now. And he’s getting a hard time with the removal of the Mercedes Benz Expansion Tank. I tried searching, but just found vague infos. So far, this is the most useful. It would a wonderful guide perhaps.

Thanks for sharing it.