bmw z3 - water pump replacement

bmw z3 - water pump replacement

[projman]

I keep hearing not to let the water pump run without coolant for it would break its mechanical seal. So how does it survive in the initial start up while the t-stat is still closed?

I’m also clearing out the old coolant especially thru distilled water dilution method (several cycles and drain until
clear), how do you ensure not to introduce cold water to a hot engine which could warp it?

Thanks in advance!

[toddheil]

Generally decent vid explanation, except.. yes... why were you attempting to replace it, if there wasn't a problem?

[ZorinInc]

Did I miss something? Why are you changing your water pump out if it isn't broken?

[trillpanch]

So got 97 z3 2.8 nd I order a pump but fill like it don’t fit I gotta force it but on the 96 it smaller which one did u get

[paulsanders]

Sonny, have you considered deleting the mechanical fan? Its not really needed in the Z3s since they have an electric fan up front. I deleted mine over 2 years ago with no issues. The other reason you might want to delete it is that the plastic mechanical fans have a history of breaking apart and spewing pieces all over the engine bay and puncturing the radiator, causing damage to the hood, etc. I can send you more info if you are interested. Paul