Another Water Pump Thread;
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
I've bolted on probably a half a dozen water pumps on various 7.3's (mine, neighbors, friends) purchased from Riffraff and none have ever leaked except the one I had to replace on my Excursion, but that was after I put close to 100k mile on it and it wore out from use, not from defect.
ELC in all the rigs because of course, you know I'm an ELC proponent.
Stewart
ELC in all the rigs because of course, you know I'm an ELC proponent.
Stewart
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I've bolted on probably a half a dozen water pumps on various 7.3's (mine, neighbors, friends) purchased from Riffraff and none have ever leaked except the one I had to replace on my Excursion, but that was after I put close to 100k mile on it and it wore out from use, not from defect.
ELC in all the rigs because of course, you know I'm an ELC proponent.
Stewart
ELC in all the rigs because of course, you know I'm an ELC proponent.
Stewart
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
I'm not sold on the casting sand theory. I'm more of the mind it's silicate drop out from the SCA package added to the conventional green coolant. https://www.ford-trucks.com/forums/9...ml#post8937207 Plus, there are other reasons that cause water pumps to fail too..
Stewart
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I have a coolant filter on my Ex, but not on my old 2002 F250 that is still in the family (daughters). The factory water pump I replaced on the '02 is still going strong at over 100k but the Ex is on it's third pump (factory, then changed twice by me).
I'm not sold on the casting sand theory. I'm more of the mind it's silicate drop out from the SCA package added to the conventional green coolant. https://www.ford-trucks.com/forums/9...ml#post8937207 Plus, there are other reasons that cause water pumps to fail too..
Stewart
I'm not sold on the casting sand theory. I'm more of the mind it's silicate drop out from the SCA package added to the conventional green coolant. https://www.ford-trucks.com/forums/9...ml#post8937207 Plus, there are other reasons that cause water pumps to fail too..
Stewart
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
I am with Stuart on the casting sand issue. I am not sure that they even use sand anymore as opposed to something more "user friendly" but they may have still used it ~15 years ago. That said I doubt that any could be left in the block after being hot tanked at the plant before machining. Tooling does not like a bunch of grit on the surfaces at all.
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
I'll tell ya my reason for installing a coolant filter. I first thought that it was unnecessary after you do a complete flush. But.. I flushed mine several times using Cascade dishwashing detergent (liquid) as it's a very good grease cutter and it doesn't make a lot of suds. After the Cascade flush I drained and refilled several times using hose water. I then flushed it with about 35 40 gallons of distilled water. Now I didn't have any oil issues in my coolant I just wanted to make sure it was clean as I was replacing any and every part of the cooling system and going back with ELC. So after a couple weeks of driving it, and a mtn trip towing my camper I was getting a bunch of crap and dirt built up in my degas bottle. What happens is after all of the flushing you still can't get all of the Cascade out and it continues to clean. So of course that's when I ordered a coolant filter system from Clay. And that's my two cents.
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I have been communicating with Clay with some questions concerning the OEM/Navistar water pump that he sells.
I have been trying to find out what the larger "O" ring seal fits that is included with his pump.
He says he needs to update the picture and that seal is no longer included with the pump.
he says the seal is for the lower outlet pipe.
he says that FORD does not offer the thermostat seal by itself and the aftermarket ones are inferior.
I looked up the thermostat seal at Auto Nation Ford White bear lake and found that FORD lists F4TZ-8255-AA as the thermostat seal.
Clay sells a F81Z-8255-AA as the seal for the lower pipe.
Are these seals one in the same?
I have heard something about the thermostat seal having a bevel on 1 side that should face up in order to seal to the thermostat housing properly.
I am just trying to make sure I've got all the correct seals on hand before I order a new pump.
Thanks for any suggestions.
I have been trying to find out what the larger "O" ring seal fits that is included with his pump.
He says he needs to update the picture and that seal is no longer included with the pump.
he says the seal is for the lower outlet pipe.
he says that FORD does not offer the thermostat seal by itself and the aftermarket ones are inferior.
I looked up the thermostat seal at Auto Nation Ford White bear lake and found that FORD lists F4TZ-8255-AA as the thermostat seal.
Clay sells a F81Z-8255-AA as the seal for the lower pipe.
Are these seals one in the same?
I have heard something about the thermostat seal having a bevel on 1 side that should face up in order to seal to the thermostat housing properly.
I am just trying to make sure I've got all the correct seals on hand before I order a new pump.
Thanks for any suggestions.
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
The THERMOSTAT seal that came with the billet housing on my rig is grooved and fits around the thermostat flange it self. I know not about the one you first mentioned but it must be a lot larger than the thermostat. Try Bob at Diesel O-Rings or even Napa.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
That sounds like the one Clay is describing.....I'll give Bob a shot....
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
A quick search using those part numbers shows this:
So, no.
Stewart
UPDATE: I used Kris' part number and went to the local dealer to get the o ring. I ended up getting a thermostat gasket as well.
The Ford o ring for the lower pipe is not a round o ring. It is flat on the side up against the pipe, and chamferred on the outside top and bottom. After measuring the height at 0.111" and the width at 0.078" and the ID *I think* at 2.500" the closest item in the McMaster-Carr catalog is a dash 144 o ring. It's width is 0.103". I think after seeing the factory o ring, it is probably best to keep a spare one of them since it's about $6 at the dealer. The McMaster o ring would probably work, but I would use it in an emergency only.
Here is the two o rings, one for the lower pipe and one for the thermo.
And a closer shot showing a little of the shape...
The Ford o ring for the lower pipe is not a round o ring. It is flat on the side up against the pipe, and chamferred on the outside top and bottom. After measuring the height at 0.111" and the width at 0.078" and the ID *I think* at 2.500" the closest item in the McMaster-Carr catalog is a dash 144 o ring. It's width is 0.103". I think after seeing the factory o ring, it is probably best to keep a spare one of them since it's about $6 at the dealer. The McMaster o ring would probably work, but I would use it in an emergency only.
Here is the two o rings, one for the lower pipe and one for the thermo.
And a closer shot showing a little of the shape...
Stewart
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
To add to my above post, the past few OEM thermo's I've purchased have all had the gasket material incorporated with the thermo, all one piece and there was no separate o-ring or gasket in the box.
Example:
Stewart
Example:
Stewart
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I bought a new 203* Tstat from Dieselsite a few months back, it didn't come with any type of gasket.....most I've seen done on videos use a seal that just sits on top of the stat after its installed....
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
I just bought THIS water pump from Diesel O Rings, I am convinced that its the same pump that Clay at Riffraff sells.
$143 plus free shipping.....
Water Pump for 1999 through 2003 Ford 7.3 Powerstroke Diesels
Can't find a replacement grooved seal like the one pictured
I've also got the F81Z-8255-AA gasket coming from elsewhere...…
$143 plus free shipping.....
Water Pump for 1999 through 2003 Ford 7.3 Powerstroke Diesels
Can't find a replacement grooved seal like the one pictured
I've also got the F81Z-8255-AA gasket coming from elsewhere...…
Thread Starter
|
Lead Driver
Joined: Feb 2000
Posts: 5,374
Likes: 46
From: Palm Bay, Florida
If you're meaning the lower hose inlet pipe seal it is included with the new pump. The main larger seal, the small seal for the heater hose pipe and the one for the lower radiator inlet hose pipe....