Yes, drain the radiator, and remove the lower hose. then remove the two 10mm bolts holding it onto the pump. Lots of water will go everywhere so you need to get everything dry before reinstalling that neck.

 

Thanks Kris,

Now just gotta find time.

 

Well, if I may offer a different solution to making that o-ring seal up nice and tight with no leaks, don't use any sort of glue or silicone sealer. In my experience that sort of stuff works for a very short time and then you have a mess to clean up again.
Use a very light coat of silicone grease.
The O-ring is made of rubber and it is designed to follow the expansion and contraction of the fitting that it is installed in to keep it sealed up. If it's anchored down by some sort of glue it cannot flex and do it's job!
I had the exact same leak that you do Fire Rooster and what I did to repair it is to go and get a new o-ring from Ford and replace it, coating the flange and the o-ring with the same thin coating of silicone grease described above. That was last year and it's still dry as a bone at that flange.
I just checked at Napa online and they don't list the tube that I get all the time from my local Napa outlet.
I'll get the part number and post it tomorrow from work.

Trust me guys, you'll get MUCH better results if you stay away from gluing that o-ring down. I've done it this way for 20 years. I had to learn the hard way after a major butt-chewing from my boss when I was a greenhorn and he had to pay for a comeback repair in a different town on a waterpump job. I was trying to do it right and using silicone sealant on all the gaskets and o-rings and it just leaked. After that I switched tactics and nothing has ever leaked since that I put together with this method. 20+ years.
Faucet lube works too, it's waterproof.

 

Thanks kwik,

Yeah get me the info I will go that route.

 

I'm still at home, check back in 1/2 hour and I'll have that part number.

 

Napa part number: 765-1351
Tube of silicone grease.
Water repellant
-20 to +600 degrees F.
Harmless to rubber.

Use sparingly. Apply only enough to make the contact surfaces look nice and wet with no excess buildup.

 

One more thing: there is other types of silicone lubes/greases that are available at NAPA. I've tried the others, the Sil-Glyde is the best. You may have to order it by part number. Napaonline doesn't even list it if you put in the part number. That's why I posted the picture so you can show the counterman if needed.

 

Cool Thanks,

Do you happen to have the oring part number? I went by Ford yesterday to get the oring and a couple gallons of the gold coolant. There was a discrepency on which oring it was.

 

I used faucet grease on my o-ring. It's in a small (quarter sized) container, and I got mine at Lowes, back in the faucet repair section of the plumbing department. It's only a couple bucks.

 

Fire Rooster, I don't have the part number, sorry.
Jeremy that is just as good of stuff as the Sil-glyde. It's a waterproof grease as well.

 

Does anybody have a part number for the oring between the flange and the water pump on the lower radiator hose?

 

Water Pump Inlet Pipe Gasket (o-ring)
(Ford) F81Z-8255-AA

 

Kris that is for the lower hose right?

 

My common sense tells me that the thermostats are on the outlet of the water pump, either directing it back into the engine or out to the radiator. Heat rises, cool water falls, so yes the return hose into the water pump is the lower one.

 

Right on thanks again,
i got both orings from ford. The parts guy was unsure hich was mine so Now I can return the other one. Thanks