View Full Version : Secondary water pump?

03-30-2008, 07:30 PM
It looks like I need to change secondary (auxiliary) water pump (540i)

Car was sitting for a while and I had to change a hose in the back of the engine but the secondary water pump was leaking a little bit before, now it's done (coolant all over it and that side of the engine).

1) Can it be just bypassed, so just removed it completely? I know I'd loose ability to have heat while the engine is off but that's fine.

2) It looks like if the heat is off car isn't overheating, could it be that if the heat is off coolant doesn't leak there..doesn't go to the secondary pump?? :confused:

03-30-2008, 09:03 PM