Electric Water Pump damage
 

What is causing this damage to the inside of my electric water pump, and what can I do to stop it. I run just water in the system,and drain it in the fall.

Re: Electric Water Pump damage
 

I always understood when you let air get to wet metal it still corroded. I always leave the water in. How about electrolysis?

Re: Electric Water Pump damage
 

Lyn run the Lucas (* it works) cooling system additive or the redline water wetter. Both are good for aluminum blocks/heads/intakes/water pumps. It won’t allow it to corrode

Re: Electric Water Pump damage
 

Lyn,

Wix, #24056 cooling system treatment is also a good product and available at most auto parts stores. It is around $7.00 per quart.

Re: Electric Water Pump damage
 

What fluid do you run in the coolant system? Tap water could have some metals that will attack aluminum. Excess acidity can corrode it to. Check the Ph level of the water you use with a test kit. I run distilled water only and drained the block and pulled the water pump to change the cam this week. Lots of rust in the water but no damage to the WP.

Re: Electric Water Pump damage
 

The debate will continue about what water to use. I do know that some coolant additives state not to use distilled water. I stick to filtered drinking water for my car.

Re: Electric Water Pump damage
 

I use Red LINE.

Re: Electric Water Pump damage
 

I use distilled water and add Zerex Super Protector[ZXC04] bought at Napa was in car for 2 years and drained it this winter to change intake, intake water ports looked like new and not sign of electrolysis also run a anode in radiator petcock fitting

Re: Electric Water Pump damage
 

Mr. Smith and others,


IF the surface we are looking at in the pic is aluminum (ie: non-ferrous), the problem is specifically from natural electrical action to corrode the material. IF that is the case, the original surface should have been anodized so as to decrease the action but would be better to use a sacrificial anode in the cooling system as well. IF originally anodized, any scratch through the finish accelerates the problem. IF the surface is supposed to be ferrous, it is surprising that it shows no ferrous oxide (rust) residue. So, it appears to be non-ferrous.:cool:



Either way, there are no negatives to use a sacrificial anode in the cooling system. Those type anodes are available at any hardware store or at Lowes, Home Depot, etc.;)


Regards to All that like this kind of stuff,
HB2:)
Dissident

Re: Electric Water Pump damage
 

Thanks for the info everyone. Someone please post a picture of a anode.I know if I go into the H ware store and ask the lady for a anode, I will get that funny look.LOL

Re: Electric Water Pump damage
 

Lyn,here's one from Champion rad it screws into the water drain.Summit also sells them. gsa612

Re: Electric Water Pump damage
 

To protect aluminum the anode has to be more active than the aluminum, which would be a magnesium anode.

To protect iron you can use zinc as an anode.

To protect copper and brass, an aluminum anode will work,

Re: Electric Water Pump damage
 

Re: Electric Water Pump damage
 

That won't work..

He needs magnesium..

Re: Electric Water Pump damage
 

Another thing to consider, in some cases a rubber-mounted radiator with an electric fan attached to the radiator core needs a ground wire from the radiator core to chassis ground.

Re: Electric Water Pump damage
 

Looks like the pump has not been sealed well to the engine or cover and water has bee getting between the pump housing and the gasket causing the corrosion issue. I run what ever water I can find from home or the track and drain my system every day at the track and never leave water in the system when the car is stored between races. I usually leave the radiator cap off when the radiator is empty. My water pump is at least 25 years old and still working. Maybe try coating the gasket with some better sealer when the engine is assembled as the corrosion seems to be in the gasket area and not in the are where the Impeller is located

Re: Electric Water Pump damage
 

Thanks for all the info. My radiator is copper/brass. I will try the radiator ground,and the anode. It is also damaging my aluminum timing cover,and thermostat housing.

Re: Electric Water Pump damage
 

So with a iron block with aluminum heads and water pump I would want one magnesium anode and one zinc anode?

Thanks,
Bill

Re: Electric Water Pump damage
 

Jegs has radiator anodes.

Re: Electric Water Pump damage
 

The point of an anode is to put something in the water stream that is weaker than the other metals the water passes over. Then the bad stuff in the water erodes it instead of the stronger stuff. Magnesium is a weak metal. Since they decompose they need to be replaced regulary. That reminds me.....

Re: Electric Water Pump damage
 

It happens in washing machines too. Go figure.