how hard is it to spin the impeller pump pulley by hand ? ( VP 3.0 GS )

[aerobat]

hey gents !

an odd question...

i today cleaned and painted my pulleys due to a little rust and was a little confused about the force you need to move the raw waterpump pulley. the force needed is significantly higher than the servo pump or the alternator pulley, you can move it by hand but you need to take it firmly to turn it, no way it will spin "free" with two fingers like lets say the alternator pulley.

enybody has experience on this ? is it normal the raw waterpump gives a resistance when try to spin it ? ( block/pump drained ) or do i look into a problem ?

the pump gives no problem at all, solid waterflow, no overheating...

thanks much !

 

[Maclin]

Re: how hard is it to spin the impeller pump pulley by hand ? ( VP 3.0 GS )

If the impeller is still in it then yes, it takes some force, quite a bit more than a free wheeling shaft. It will not be an even resistance and will pulse some as the vanes pass the in/out ports.

 

[texsun]

Re: how hard is it to spin the impeller pump pulley by hand ? ( VP 3.0 GS )

I owned the VP3.0 and replaced the impeller at least 3 times. The impeller fits very snuggly inthe housing. It will absolutely not spin freely. I think what you're describing is normal.
I always replaced the impeller every other year...and never had a problem.