OEM Water Pump life

[barron64]

What kind of lifespan are you guys seeing with the stock water pump? I have 70k miles with no issues but if this is a common failure point around this mileage, I will go ahead and change out. I don’t like to wait till something like this puts you on the side of the road.

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[Skye]

I cannot give Mustang pump feedback as my car is still new, but in things like this, I...

As you approach the time to replace the coolant, depending on your expectations for how long you'll keep the car, you might consider replacing the pump then, along with any coolant hoses and the thermostat.

While I did not replace the pump in my truck (Toyota), during the first coolant replacement, I asked for radiator hoses, heater hoses and thermostat to be replaced. That was at the 10 years, 100,000 mi / 160000 km mark.

Like you, I was leaning forward a bit. The thoughts on the pump at the time was it should continue to work well for several more years. The Mustang pump...those with direct experience will provide feedback on that.

 

[NGOT8R]

One thing to note is, some people have mistaken the pump for bad, when the actual problem is the o-rings losing their seal in the Y adapter and causing leaks. Dorman sells a replacement o-ring kit to take care of the issue.

 

[Diegosuave]

I replaced my cooling system (which includes the water pump, thermostat, thermostat housing, t-connector hose, and other hoses) about five months ago on my 2016 GT with 118,000 miles. I had to do this due to wear and tear on the water pump and significant leaks, but prior to that, I didn't experience any cooling issues. Some members have reported premature failures at around 40,000 miles or less, often due to bearing problems or issues with the plastic propeller.

I chose OEM parts because I was confident in their durability. The only part I upgraded was the thermostat housing t-connector hose, which I replaced with an aluminum version to prevent future leaks.

In my opinion, it's a good idea to check for any signs of weeping from the water pump or perform a pressure test to look for leaks. If everything appears fine, I wouldn’t recommend making any changes. However, if you want peace of mind, it's worth considering. Just be aware that it can be quite labor-intensive.

 

[MathematicsDP]

I experienced failure at 55,000 miles and just replaced it. I saw the leak and heard a weird noise like a bad bearing. I had 2 shops look at it just to confirm and I had to replace it. Luckily I was able to get the oem part for free from Ford since I had enough points for it.

If you're replacing anything with cooling and you haven't had to do that by now, I'd recommend replacing the water pump, water pump pulley, thermostat, belt, and belt tensioner to get all new parts for peace of mind.

 

[barron64]

One thing I have found out is that the oem pump and aftermarket pumps, all have plastic impellers which of course is a failure point. Ford Racing offers two water pumps for the Coyote...Pn# M-8501-M50A, which looks like just a replacement pump but not sure what is different or hi-po over stock, and a M-8501-M52A that actually advertises it has a larger impeller. However, I cannot confirm that either actually has a metal impeller. Anyone have any experience with either of these pumps. Metal or plastic impellers?

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