Leaking water pump Sprint

[Keith CANSDALE]

My pump is leaking coolant out of the slot on the block. I had the seals replaced only 18 months ago. Should I replace the whole pump or the seals and the impeller only? Thanks KC

[SprintMWU773V]

When you replaced the seals did you machine the underside of the impellor? Also it is quite easy to damage the seal when re-assembling. If it's just a leak I would strip it down and inspect the pump before condemning it, they are both rare and expensive.

[Mahesh]

Just a thought, I done my water pump over four times, and still had a leak from the slot.

The thermostat housing had a blockage on the small pipe to the expansion tank.

[mahony]

Another point to remember is that if the car has been laid up for a while it's not uncommon for the pump to leak from the slot but then stop after some use as the seal beds in again

[cliftyhanger]

I did my pump a while ago, and fitted the seal kit with the addition of a ceramic ring for the seal to run on. Actually quite simple, just need a lathe to remove a little metal and then glue (yep, supplier suggested silicon rtv) the ring in place. No leaks, and no reason to suspect it will be an issue for a very long time....

[Flyfisherman]

My pump is leaking coolant out of the slot on the block. I had the seals replaced only 18 months ago. Should I replace the whole pump or the seals and the impeller only? Thanks KC

Here's a thread to read viewtopic.php?f=4&t=7214&start=15#p109817

Paul