Aisin Water Pump

[80FoxCoupe]

Yep, I have used Aisin kits in all my Toyota timing belt services.
If the Ford Performance version had come with an aluminum impeller, I would have probably bit the bullet and bought that one. However, $250-$280 for essentially the same pump with a larger “plastic” impeller. Nope.

Why do you think the aluminum impeller is superior? What data do you have to support that theory?

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[Whitedevil95]

Why do you think the aluminum impeller is superior? What data do you have to support that theory?

I was wondering this same thing. The Ford Performance one says it flows 30% more water, which makes sense that it would be better. Im assuming they are thinking the aluminum impeller will be more durable long term compared to plastic?

 

[80FoxCoupe]

I was wondering this same thing. The Ford Performance one says it flows 30% more water, which makes sense that it would be better. Im assuming they are thinking the aluminum impeller will be more durable long term compared to plastic?

I was hoping there were some performance metrics than could be referenced. I have not seen any durability issues from the oem impeller. What that material is, I'm unsure exactly. Calling it plastic would be akin to calling an aluminum unit metal. One could assume metal is better than plastic but we don't know for sure which material has the advantage in this application.

 

[SheepDog]

In my many years as a tech, I had never seen a metal impeller water pump fail. I have however, seen several plastic ones fail. The material does get brittle over time, and then generally the point where the plastic impeller goes over the metal shaft that connects to the pulley fails, and the impeller just slips on the shaft and no longer moves coolant. Some do fail in a catastrophic manner, and send chunks of plastic through the cooling system.

 

[80FoxCoupe]

In my many years as a tech, I had never seen a metal impeller water pump fail. I have however, seen several plastic ones fail. The material does get brittle over time, and then generally the point where the plastic impeller goes over the metal shaft that connects to the pulley fails, and the impeller just slips on the shaft and no longer moves coolant. Some do fail in a catastrophic manner, and send chunks of plastic through the cooling system.

Do we know if the oem units actually have a plastic impeller? Seem like a ceramic material to me.

 

[SheepDog]

Do we know if the oem units actually have a plastic impeller? Seem like a ceramic material to me.

Not sure of it's exact composition, but for sure it isn't the same material as the shaft that it is pressed on to. The expansion and contraction of things just works against them, and eventually (could be 100,000 miles or more) the impeller just slips or cracks at the shaft.

The OEM unit does appear to have a metal sleeve pressed into it, so that is reassuring. I don't think I've heard of even one or two of these failing in here. Probably has happened, but not common. Certainly not something Im going to lose sleep over. To me, a Water pump is a maintenance item, but then again so is a fuel pump.

 

[80FoxCoupe]

Not sure of it's exact composition, but for sure it isn't the same material as the shaft that it is pressed on to. The expansion and contraction of things just works against them, and eventually (could be 100,000 miles or more) the impeller just slips or cracks at the shaft.

The OEM unit does appear to have a metal sleeve pressed into it, so that is reassuring. I don't think I've heard of even one or two of these failing in here. Probably has happened, but not common. Certainly not something Im going to lose sleep over. To me, a Water pump is a maintenance item, but then again so is a fuel pump.

Typical coyote water pump failures are simply seal failures leaking out of the weep hole. I have Def seen impeller issues you described, but not on coyotes. We got opinions, throw on the pump you like and enjoy. I run the FP version on my mustang and will get another for my f150 when it's time. Why? Not sure really. LOL

 

[SheepDog]

I run the FP version on my mustang

Do you notice any improvement in CHT's? Probably makes sense for the F150, especially if you tow with it

 

[80FoxCoupe]

Do you notice any improvement in CHT's? Probably makes sense for the F150, especially if you tow with it

I didn't not notice any CHT difference on the mustang. It's possible recovery time after pass was quicker but ive never looked for that. Thermostat, radiator and fan on/off settings all the same.

 

[Garfy]

In my many years as a tech, I had never seen a metal impeller water pump fail. I have however, seen several plastic ones fail. The material does get brittle over time, and then generally the point where the plastic impeller goes over the metal shaft that connects to the pulley fails, and the impeller just slips on the shaft and no longer moves coolant. Some do fail in a catastrophic manner, and send chunks of plastic through the cooling system.

Yes, I've seen the same thing in my 44+ years as a Master Tech. The "good" failures were the ones where the hub over the shaft would develop and crack so it would slip and not turn well enough to pump water; the bad ones broke apart and as you said, it's fun trying to get the broken pieces out of the water jackets. Of course, these were on domestic vehicles, primarily Chrysler and GMs, though some Fords had that issue too. Didn't see any of this in Hondas and Toyotas.

 

[SheepDog]

Yes, I've seen the same thing in my 44+ years as a Master Tech. The "good" failures were the ones where the hub over the shaft would develop and crack so it would slip and not turn well enough to pump water; the bad ones broke apart and as you said, it's fun trying to get the broken pieces out of the water jackets. Of course, these were on domestic vehicles, primarily Chrysler and GMs, though some Fords had that issue too. Didn't see any of this in Hondas and Toyotas.

BMW's, Volkswagens and Audis of the late 90's and early 2000's loved to do this too. But at least they used the same garbage material for all of the coolant hose connections, so when you attempted to take something apart, it would disintegrate in your hands.

 

[tdstuart]

Aisin does make fuel pumps. As they acquired Denso in 2022, so it maybe a Denso fuel pump.

Couldn't find anything from denso regarding the pump. Part # is FUPFD-00662, looks to be aisin branded.

Sorry for highjacking this thread. My main curiosity is reliability and performance as a product the aftermarket community could use as its an extremely cheap fuel pump that has high performance potential.

 

[barron64]

Why do you think the aluminum impeller is superior? What data do you have to support that theory?

Past experience with plastic impellers cracking on other vehicles. I have seen the impeller split and just spin on the shaft creating mysterious overheating issues. . Never seen any of those type failures with aluminum. However the positives of plastic impellers are they are cheap to make, light weight and if the bearings fail, that plastic impeller will not chew into your block or timing cover.

 

[80FoxCoupe]

Past experience with plastic impellers cracking on other vehicles. I have seen the impeller split and just spin on the shaft creating mysterious overheating issues. . Never seen any of those type failures with aluminum. However the positives of plastic impellers are they are cheap to make, light weight and if the bearings fail, that plastic impeller will not chew into your block or timing cover.

I hear you, but have never seen those issues with coyote water pumps.

 

[Garfy]

BMW's, Volkswagens and Audis of the late 90's and early 2000's loved to do this too. But at least they used the same garbage material for all of the coolant hose connections, so when you attempted to take something apart, it would disintegrate in your hands.

Yeah, I remember looking at the "new Beetle" and how there were a lot of plastic connectors for the cooling system. I think some Minis also had them. If/when my w/pump fails, I'll probably get the Aisin. They do make some good parts, not only for Japanese cars.

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