Slowcrash_101

Many water pump failures can be attributed to using water, because corrosion clogs the weep hole and then the pump's pulley bearing can no longer be lubricated from the outside.

windhund116

I always thought it was seal failure, leading to coolant getting into the bearing?

Slowcrash_101

Coolant lubes the bearing, that's why you have a weep hole on the pump. A tiny amount of coolant weeps out of there and flows into the bearing from the outside. That's how the pump bearing is lubed.


Hmm, I was wrong, it's to prevent coolant from washing out the grease on the bearing.

windhund116

Yeah. I remember an old time mechanic telling me if you see water stains coming off the weep hole --- the water pump will soon fail.

zeroptzero

Just to get away from plastic end tanks which crack and leak as they age, it does take 20+ years but when I changed rads I wanted all aluminum rather than plastic and aluminum for the occasional track use etc. OEM rads will last a long time though.

Mr.Matchbox

Found a document online long time ago by a waterpump manufacturer that states that you should never turn a new waterpump by hand before you install it. Lack of Lubrication by the coolant can destroy the seal when you turn it by hand.
Cant remember the manufacturer, but it was a big brand.

robjoshua228@yahoo.com

What is a favorite steel/aluminum Coolant reservoir tank for the S2000? I could not find any for the S2000 easily online. I purchased the one for my MX5 from ILmotorsports in Germany and Goodwin racing has them for the MX5 https://www.good-win-racing.com/Mazd...t/61-2037.html. Appreciate your guidance.

Mr.Matchbox

Never found one for the S2000. But since our reservoir tank is not pressurized, the plastic should last a long time....

robjoshua228@yahoo.com

Got you, in the MX5, a burst Coolant reservoir can basically cause your engine to fail. Glad this is not the case for the S.