Use gt3 water pump with metal impeller?

[That986]

Never ever put a metal impeller pump in an engine block no matter what engine it is. If that bearing fails then you have thousand of metal bits now making your way round your coolant system as well as reshaped ports around the pump.

As for when to replace a good rule of thumb is every 40000 miles or 4 years. That's what VW recommends on their pumps and i reckon that's not a bad shout.

[itskenallen]

Originally Posted by That986

Never ever put a metal impeller pump in an engine block no matter what engine it is. If that bearing fails then you have thousand of metal bits now making your way round your coolant system as well as reshaped ports around the pump.

As for when to replace a good rule of thumb is every 40000 miles or 4 years. That's what VW recommends on their pumps and i reckon that's not a bad shout.

I've done a lot of research the last few days on this as I'm in the middle of replacing mine.. And apparently it's a subjective opinion really. Pros and cons of both. Metal impeller versions are less likely to fail but if they do you'll chew up ur block. And plastic impeller pumps can break and block water ways causing hot-spots. I opted for a composite one

Sent from my Galaxy S8+ using Tapatalk