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ET after only 8k!?

1K views 8 replies 5 participants last post by  EmFiftyFour 
#1 ·
I recently replaced my entire cooling system during my engine swap and it hasn't even been 8k miles and the dam expansion tank is leaking already? Is BMW serious with such a design or they don't care? Or did I just get a faulty product? Is this a normal thing? What's the earliest you heard that someone had to replaced theirs?
 
#5 ·
Gotta be careful when filling the expansion tank, BMW states the level should be set at 68F.

If you check/fill the expansion tank when much colder, always fill to the lowest mark.
 
#7 · (Edited)
Replace the tank cap, they can have issues over the years as well.

The good news if it was purchased via a dealer, 24 Month/Unlimited Mileage Warranty, does not help that is has to be changed, just helps the wallet if you are still within the 24 Month window.
 
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