Thank you!
I wasn't planning on replacing the expansion tank (just the "retainer"; part number 17111438819;
https://www.fcpeuro.com/products/bmw...x5-17111438819 because it came with the radiator kit).
Should I replace the expansion tank?
What was wrong with the original BMW one and what should I look for in a replacement to make sure the design flaw is addressed?
Are you saying the original BMW trans cooler thermostat is also flawed and should be replaced with something other than BMW (like the Vemo one X5Chemist recommended)?
Quote:
Originally Posted by 80stech
You don't need the aluminum thermostat housing. You can put a few wraps of teflon tape around the o-ring on the sensor that goes in the lower hose and it will be good forever. As far as the expansion tank, the OE one was a problem and I don't think BMW improved them, so a good after market one will be as good or better than OE in this case unless someone knows different ? Same with the trans thermostat and coolant sensor, I've never heard anything about the ones that come with a good aftermarket expansion tank give problems ??
I have a thread about the second Standard Automotive tank that I put on my wifes E83 (same tank but thread might be in E83 forum) that was missing the groove for the lower retaining ring. If you look at how that is all put together, the upper hose holds everything together. There needs to be some movement somewhere because the radiator is going to expand at a different rate than the expansion tank and if everything is solid there will a lot of force put on the lower plate. IF there is enough movement in that lower tank connection even with the retaining ring then everything is fine but I don't think there is because people always have trouble pushing that connection together, never checked it myself though. Just saying, interesting  |