![]() ![]() After that I just hosed down the engine bay.Make sure you have a battery charger hooked up as it takes 10 minutes for it to complete the process. In the end I had to replenish about ~3L worth coolant (BMW finest concentrates $30 and Walmart's finest distilled water Perform the e-water pump bleeding step (lots of guides abound).Replace malfunction t-stat with MAHLE unit and reverse action on everything.I find this is the hardest because I can't see jack squat despite removing the hoses and cables away. T30 to remove the twin torx screws holding the T-Stat. ![]() There are lots of space for a good size bottle. As I removed each hose, I put the funnel underneath it to catch coolant spill.OPTIONAL: I replaced that clamp with the worm-screw style clamp. Flat head away the clamps that held 2 of the 3 coolant hoses.Cover the inlets/outlets to prevent coolant spilling in Flat head away to remove the air intake plumbing.I stuck some newspaper to protect and keep smell away I used turkey baster to suck out coolant from the expansion tank.With 8mm socket wrench unscrew the bolts for the underbody tray.Funnel with small hose attached into a bottle (I used to this to capture the inevitable coolant hose splash) That said, if your coolant is old enough, you should just drain it.īe forewarned, this is a messy job. That required some out of the box planning. Also I was a bit stingy wanting to minimize draining the fresh (less than a year old) coolant. However only one youtube video pertians N20 on a 528i. The interweb has a few of BMW thermostat change instructions and videos. Picked up a MAHLE unit from Amazon for $90. A call to my local BMW dealership they quoted me $223 for the t-stat alone plus another obscene labour rate of $300. ![]() This prevents your precious engine from going KABOOM in a short time span. Unlike other cars, modern BMWs have the sense to design the t-stat to fail open. Got the dreaded P0597 - Thermostat Stuck Open error code a few weeks ago. ![]()
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