Thermostat reliability

[Scott ZHP]

Originally Posted by Joshdub

I would also suggest a metal impeller water pump but not URO. I avoid URO like the plague.

I do too, normally. Just to clarify for the OP, I wasn't suggesting a Uro water pump. Just the pulley, as it's surprisingly good quality.

I have not seen an M54 water pump with a plastic impeller in years. The pump to have is the Stewart, but it's three times the cost of a Graf. I have one on my 330i; it's warrantied "for life", whatever that's worth.