water pump question

[mk3forme]

I bought a new water pump from autozone yesterday. I did this versus a toyota one for two reasons. Obviously the biggest is cost, but also cause its more convenient. I notices when I got home the the prop that moves the water are quite different on the two. Does anyone know if this will make a difference or from previous experience know whether one moves more water than the other. It seems to me that the factory setup would just flow water better cause it extends out from the housing farther, but I dont know.

 

[suprageezer]

It sure looks to me like both those pumps spin the same direction, just one has a sheet metal impeller and the other has a cast impeller.

 

[jdub]

It's not sheet metal...it's stainless steel on the Ansin pump. That's one reason it's more expensive. The cast impeller looks like mild steel...it will rust...the stainless impeller will not.

 

[loki2043]

the autozone one looks like it COULD be more efficent the way its set up but then again the toyota one's impeller is set up for more flow by the looks of it.. you would have to get them flow tested to see which ones better.. prolly the toyota one.

 

[mk3forme]

good good. These are the kinda answers im looking for. Anyone else? As far as rusting. Im sure it could rust. But not necessarily will rust if you keep an adequate mix of coolant right?

 

[loki2043]

well...maybe, your better off just getting the toyota one. if you stick with the other guy check it after about 25k miles just to make sure. theres still water in that mixture so its gonna rust. i work with pool/pond/sump pumps so i know a little bit about this. ive seen some huge ass irrigation pumps with half eaten impellers from some nasty water supply that they use.. so watch carfully, that impeller might not last long

 

[johnathan1]

I have the Autozone pump in my car, and the one that i took off looked the same...I guess it was a replacment as well. It looked good when I removed it...I replaced it only because the gasket was leaking, and it had unknown milage.

The new one has been fine for about a year.

 

[mk3forme]

I have the Autozone pump in my car, and the one that i took off looked the same...I guess it was a replacment as well. It looked good when I removed it...I replaced it only because the gasket was leaking, and it had unknown milage.

The new one has been fine for about a year.

So Johnathan, let me see if I understand ya. You had an autozone pump on your car and replaced it with an autozone pump,or remanufactured pumps. Or you had a toyota pump and replaced it with a copy cat pump. Reason I want to verify is that you would know what the prop looks like after use.
Also guys I realize the rust factor here. But every piece of metal in the motor that comes in contact with water, besides the head, can rust. So does that warrant spending $106 vs $40 for the autozone pump? Im leaning towards no unless someone knows that the toyota pump flows alot more than the copy. Thanks again for all the feedback guys. Im probably thinking way to much about stupid stuff for my build, but its my first. Im always a little more anal the first time I do something.

 

[cnewingham]

I bought my waterpump from Kragens for about $60 with lifetime warranty. I also do that with my starters, alt., and fan clutch as I have never ever had a problem returning an item for an exchange. Toyota doesnt give me that warranty.

 

[mk3forme]

I bought my waterpump from Kragens for about $60 with lifetime warranty. I also do that with my starters, alt., and fan clutch as I have never ever had a problem returning an item for an exchange. Toyota doesnt give me that warranty.

Another good point and thank you for mentioning. The toyota pump will not have the warranty, although alot of people wont have the car long enough to use the warranty, hopefully.

 

[Clip]

i say take the impeller off and get it powdercoated, or coat it in a rustproofing material.

like everyone said, it'll rust if exposed to the wrong conditions but it should last a pretty long time.

 

[johnathan1]

I'm pretty sure my water pump impellers looked the same. I'll see if I can get a pic today, I think I saved the old one just in case.

 

[mk3forme]

I'm pretty sure my water pump impellers looked the same. I'll see if I can get a pic today, I think I saved the old one just in case.

thanks I appreciate any and all info you guys can give me

 

[mk3forme]

any other opinions out there before this thread becomes a distant memory?

 

[3p141592654]

I believe the original 7M pump used a cast impeller, and toyota switched to the stainless impeller later on during production. The exact reason is of course unknown, but I suspect it could be cost.

 

[suprageezer]

Attach some kind of anti-cavitation plate so it pumps water like a mofo. As soon as I get out to my brothers shop I will be making one up so I can show some pics. For anti-corrosion I use Red Insulating Enamel, there isn't much that can eat through that stuff and a little heat hardens it rock hard.

 

[mk3forme]

I believe the original 7M pump used a cast impeller, and toyota switched to the stainless impeller later on during production. The exact reason is of course unknown, but I suspect it could be cost.

so are you saying the cast would cost more then the stainless? I would think it would be the other way around. Either that or they had problems with the cast????

 

[mk3forme]

Attach some kind of anti-cavitation plate so it pumps water like a mofo. As soon as I get out to my brothers shop I will be making one up so I can show some pics. For anti-corrosion I use Red Insulating Enamel, there isn't much that can eat through that stuff and a little heat hardens it rock hard.

what kind of enamel you suggest? what kind and where did you get it?

 

[3p141592654]

so are you saying the cast would cost more then the stainless? I would think it would be the other way around. Either that or they had problems with the cast????

Casting is typically more expensive than stamp and bend. Toyota almost always changes things to reduce cost. This is why they are kicking Chrysler's butt out of third place, and Ford is next.

 

[bluepearl]

Clean the mating surface well, install you're pump. Don't over torque the bolts. Use a 50/50 mix of you're preferred anti-freeze and enjoy.