Drain all the coolant again?!

[piper6909]

Originally Posted by cc986

My 2001 Boxster S had its engine replaced with a used engine from eBay 10,200 miles ago (17 months) at which time the coolant was entirely drained and replaced.

However, I'm hearing the water pump beginning to fail and every thing I read about it says that all the coolant must be drained when the water pump is replaced. I'm wondering, though, in this case, if it would be okay to not do that since the miles and time on the coolant is relatively low.

What are your thoughts?

I believe you're safe not to flush the coolant if the vanes of the old WP are intact. I don't see any other reason why you would need to, given that the existing coolant is so new.

[cc986]

Thanks, piper6909, that makes sense -- we don't want any plastic bits floating around in the pipes. I'm hoping my WP is not that far gone... I've only been hearing the 'diesel' sound (described on another thread here) and when I remove tension on the serpentine belt, I can easily make the WP pulley wobble. No obvious leaks and no issues with cooling.