Ford 300 water pump

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Jun 16, 2025 | 10:55 PM

Chartis

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4th Gear

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Ford 300 water pump

Hey guys I need help.

I’ve got a 92 f150 300 2wd
when I first bought the truck I replaced the radiator because it was cracked
I had troubles with overheating when idling
so I replaced my fan still had troubles so then replaced water pump, thermostat and hoses.
I have now been through 4 water pumps in 2 year all have started leaking out the weep hole. And now it has just started again.
is it just faulty pumps or do I have something wrong.
my temp gauge stays on cold after I replace my thermostat, before it was reading normal (half way). Could it be a faulty thermostat or something plugged?

Jun 17, 2025 | 03:37 AM

Truckwardo

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Joined: Oct 2023

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From: Canada

Maybe get one of those caps that let's you know the pressure. Other than that excessive belt tension or out of balance or Chineseum curse.

Jun 17, 2025 | 06:13 AM

My4Fordtrucks

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I’m thinking the pump is bad. The local shop replaced the rack and pinion in the Outback three times with a reman from Napa. They finally gave up and used a new rack. It has been fine since then. Did you buy a good name brand pump or the store brand from the local parts store with the lifetime warranty that you spend a lifetime replacing?

If you used a “fail-safe” thermostat I can almost guarantee that it has already failed. I tried one of those several years ago. It worked for two weeks.

Jun 17, 2025 | 08:35 PM

Chartis

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4th Gear

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Out of balanced???

Jun 17, 2025 | 08:47 PM

Chartis

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4th Gear

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Yes I used 2 oreily pumps (Murray) and 2 Napa name brand pumps. My thermostat is a oreily brand, but my temperature gauge has always read cold since replacing it.

Jun 17, 2025 | 11:15 PM

My4Fordtrucks

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Zero confidence in Napa parts. I haven’t used the O’Reilly pump
but it might not be any better than the Napa pump.

Yep. Sure seems like the new thermostat is already bad.

Jun 20, 2025 | 11:32 AM

TobyB

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Joined: Oct 2014

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From: Carnation, Wah

I'd check the tensioner just to make sure it's not binding-
if it sticks, it can put a lot of pressure on the belt...

t
it's probably not, but really easy to test.