I guess it's time to flush mine.
Well, did my bi-annual drain, flush, and fill this afternoon. Why is the M30 so damned hard to successfully bleed (or is it just me)? Did coolant in 3 vehicles, the water system in the RV, and my pressure washer pump, and out of all of them the BMW was the only one that gave me the least bit of trouble. Didn't think I was ever going to get all the air out of that thing.
1990 535i 5-sp., except for 16" M-Contours, cd deck, and clear corners, completely stock. 226k and running strong
I guess it's time to flush mine.
Ralph Mendoza Jr. - Long Beach, CA
Knock on wood... haven't had a problem with mine yet.Originally Posted by Mitch90535im
Do you park slightly nose-up and use the bleeder screw with the engine running, heater on, and t-stat open?
Robin
72 Chevy K10
01 E39 M5
Mine is an M20, but I've found it easier to bleed the cooling system with the front end on ramps.Originally Posted by Robin-535im
Ralph Mendoza Jr. - Long Beach, CA
I've had to change my coolant twice in the last few months due to a couple of hoses that decided to crack and empty the coolant for me... However both times i tried bleeding in various situtations (i.e up a hill, heater off/on, etc) but I never got one bubble. No overheating or other temp problems and it's been done for over a month now. Scary...
When I got my BMW, I replaced the whole cooling sytem, hoses, radiator, water pump and thermostat. Great piece of mind.
Ralph Mendoza Jr. - Long Beach, CA
I was under the impression that the M30 coolant system was self bleeding, I've never had any problems getting mine to bleed the three times I've had it opened in the last year. If it doesn't bleed easy, check the small coolant line from the radiator to the expansion tank.
it's not self bleeding as there is a little screw near the thermostat. I hate bleeding the m30 also. I after filling up the coolant I take it for a short drive and see the temperature rising up, I get out and start bleeding for 5-10 minutes untill it goes back to normal operating temperature again.
Originally Posted by icesoft