This is BMW parts item Behr/Hella, described as Coolant Expansion Tank Cap, OEM for BMW E36, E46, E39, E38, X3, X5, Z3, Z4, which you can buy online at It would almost seem like a setup like that would have a hard stop for the cap, similar to a (old style?) radiator cap. BMW-CCA Bimmerfest Supporting Member E39 ( - ) E46 ( - ) E36 ( - ) E60 / E61 ( - [HOST] is an independent BMW enthusiast website owned and operated by Pushing coolant out the exapansion tank cap. I'm hoping for a bit of advice. my with just over k miles is pushing about 1/2 quart of coolant out (enough to trigger the warning) every miles. I overhauled the cooling system, replacing everything but the fan and fan clutch (all hoses, valley pan, wp, thermostat, tank, etc) Yup. Have one on my E36 , had one on my E46 Touring, and many have had me use them when I rebuilt their cooling systems. Given that the stock cap is a 30psi, going to 18 PSI cap is not scary. with a 2 bar cap, coolant boils at about F, with a bar cap it's around F. I think BMW uses 95 degree t-stats, which equates to about
Coolant not circulating | E46 Fanatics Forum
Product Specifications. Other Name: Cap, Filler Cap, Reservoir Cap. Replaces: Warranty: This genuine part is guaranteed by BMW's factory warranty. Fits the O'clock position of the coolant temp gauge covers from about F Function of the characteristic map thermostat The characteristic map thermostat is designed such that it opens (engine inlet) at a coolant temperature at the thermostat of C without intervention of the integrated heating system. Due to the coolant heating Using bmw OBC function and selecting Fahrenheit using the right cluster button on the gauge panel, I am able to see my coolant/engine temp. Learn how to do this yourself. And for the environment, I live in Arizona and the temp was 91 today not to bad. I honestly believe that the coolant temp sensor is bad. Sent from BimmerApp mobile app Coolant takes the heat and transfers is to the atmosphere via the radiator. As the coolant heats, it expands creating pressure. Pressure and coolant combine to effectively raise the boiling point. The cap controls this pressure, venting air or coolant. Engine stops running and stops producing heat. Coolant cools and contracts creating
BMW Coolant Cap - 17117639022 | Only Euro
That's it. The entire system is pressurized and the only "radiator cap" is on the expansion tank. Like. A. azazel61 Discussion starter. 34 posts · Joined #3 · Mar 8, Hmm ok I was just wondering since I undid the cap the other day (hadn't checked the coolant level in about 3 months) and noticed it looked white and murky, so I Just clean up the system of all residue use hose or spritzer bottle. Then with bottom off car, start it up and look. A free pressure test. Otherwise, be careful, as the system 'blows' the ET cap at 2 bar so you'd want to pressure test it below that. If I 'had' to do this, I think I'd think about just drill a hole through ET cap and fitting E46 i 4 door automatic steptronic , miles. Expansion tank cracked while at a drive thru causing immediate coolant smell followed by temp. needle being pegged full right. Immediate pull over, shut down and towed home. engine Oil is [HOST] coolant on oil stick or oil filter. The first expansion tank was replaced at about 60, miles The sensor does not make contact with the coolant. There is no O ring on the sensor. Lastly, the washer fluid sensor has the same (doesn't make contact with the washer fluid either) part number as the coolant level sensor. Joe. 03 E S62B50 w/69K. 00 E46/4- M52TUB25 w/K. 99 E36/8- S52B32 w/64K (Soon) =) Find any address on the map of Ebbw Vale or calculate your itinerary to and from Ebbw Vale, find all the tourist attractions and Michelin Guide restaurants in Ebbw Vale. The Missing: coolant cap The BMW system of an expansion tank is different than the popular versions found on many (and other) Japanese cars. Those cars utilize an expansion/overflow tank with the level marked on it. On those cars the radiator cap is bi-directional. When hot coolant pushes out toward the the little tank. When the car cools, it draws back in Also, make sure you're not overfilling the tank as this will cause leaks due to overpressurizing the system. The float level markings allow for *some* air in the tank so it can compress. All liquid will not compress and the pressure will find a weak spot to blow out of. i TiAg Sport Pkg ~k miles