Those of you with multiple water pump failures

[Perfectlap]

I thought you're not supposed to do that after using vacuum fill? Someting about letting in more air that could turn into a bigger problem upstream.

[woodsman]

after the heads were off my car I had to top up the coolant twice. Been fine since. I don't know what process the mechanic used though.

[Steve Tinker]

Originally Posted by Perfectlap

I thought you're not supposed to do that after using vacuum fill? Someting about letting in more air that could turn into a bigger problem upstream.

Thats the first I've heard about this - its a pressurised system with a one way bleed valve which only lets air (or fluid under high pressure) out.