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Waterpump - OEM or Aftermarket #5120618 05/30/19 06:46 PM
Joined: Mar 2011
Posts: 532
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Fitz98 Offline OP
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Joined: Mar 2011
Posts: 532
98 Expedition 5.4 4x4
Anyone know how the Motorcraft OEM water pumps hold up compared to aftermarket?
I have mine off currently, works fine for now, but thinking since I have it off, I might as well replace it, since I don't know the history of this one (Used engine replacement a couple years back). Also had a problem with transmission fluid in my coolant, so don't know if there are any internal seals that may have been compromised, so I would rather replace than be sorry later.

Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5120622 05/30/19 06:49 PM
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Posts: 19,778
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Chris142 Offline
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I just put one on a customers truck. Made in China just like the aftermarket ones.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5120624 05/30/19 06:51 PM
Joined: Jun 2008
Posts: 5,967
ls1mike Offline
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Not Motorcraft, but when I did the water pump on my truck I used an aftermarket one. has been fine even when towing in summer heat.

I think they have water pumps figured out pretty good.


Mike
00 Trans Am WS6 5.7 LS1
17 Silverado 3500HD 6.0
14 Caprice PPV 6.0
15 Malibu LTZ Turbo
12 Passport TT
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5120650 05/30/19 07:09 PM
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slacktide_bitog Offline
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Get the Motorcraft pump smile

It is made in Canada Canada

Re: Waterpump - OEM or Aftermarket [Re: slacktide_bitog] #5120667 05/30/19 07:31 PM
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Chris142 Offline
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Originally Posted by slacktide_bitog
Get the Motorcraft pump smile

It is made in Canada Canada

The one I just put on yesterday was made in china.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Waterpump - OEM or Aftermarket [Re: Chris142] #5120743 05/30/19 08:56 PM
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slacktide_bitog Offline
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Originally Posted by Chris142

The one I just put on yesterday was made in china.


I looked up the specific part number for the OP's 98 Expedition 5.4L
PW-423

Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5120793 05/30/19 10:18 PM
Joined: Dec 2017
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Snagglefoot Online Content
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Only about $35 plus shipping at Rock Auto.


If you want the job done right......do it yourself.
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5120934 05/31/19 05:30 AM
Joined: Oct 2014
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Jimzz Offline
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As long as its not a white box part or Gates WP you will probably be ok.


yup
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121032 05/31/19 07:16 AM
Joined: Jan 2013
Posts: 3,468
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WyrTwister Offline
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Originally Posted by Fitz98
98 Expedition 5.4 4x4
Anyone know how the Motorcraft OEM water pumps hold up compared to aftermarket?
I have mine off currently, works fine for now, but thinking since I have it off, I might as well replace it, since I don't know the history of this one (Used engine replacement a couple years back). Also had a problem with transmission fluid in my coolant, so don't know if there are any internal seals that may have been compromised, so I would rather replace than be sorry later.


Transmission fluid in coolant ? Can not think of any way that is related to the water pump ?

Most / all cars with automatic transmissions have a cooler for the AT fluid . This often is a " device " in the radiator , to transfer excess heat from the fluid to the coolant . There may be a leak there . ( With 2 lines from the AT to the radiator . )

If that is what is happening , I question whether the radiator can be repaired . Either replace the radiator or buy an external ATF cooler to mount in front of the radiator & re-plumb the lines from the AT , to the new external cooler .

But , if you have ATF in the coolant , check the transmission to be sure you do not also have coolant in the ATF . A messed up transmission is much more expensive than the radiator .

To me , this potentially is a MUCH larger issue than your original question .


Wyr
God bless
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121042 05/31/19 07:26 AM
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ford46guy Offline
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Originally Posted by Fitz98
98 Expedition 5.4 4x4
Also had a problem with transmission fluid in my coolant, so don't know if there are any internal seals that may have been compromised, so I would rather replace than be sorry later.


You need a radiator too. Do not drive like that, and do a total trans flush by changing the filter and draining the torque converter.


95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121045 05/31/19 07:30 AM
Joined: Jan 2013
Posts: 3,468
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WyrTwister Offline
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My late father in law bought a used tractor that had a Yanmar engine it . Hole in the block .

FIL was a retired mechanic . He rounded up the parts and performed the repair . This left the engine with a hole in the block .

Brother in lay ( his son ) is / was a welder . He found a piece of cast iron close to the desired dimensions , ground it to fit and welded it in place , to fill the hole .

FIL said it still seeped oil , just a little bit , but nothing major . Just keep an eye on the oil level .


Wyr
God bless
Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121214 05/31/19 10:30 AM
Joined: Jan 2004
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nthach Offline
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OEM or Motorcraft. Even if they are made in China, Ford is still specifying a Japanese-supplied bearing.

Although, I will say this - I've installed a Chinese pump on a friend's Explorer and it's still working. The gasket is leaking, kinda my fault but it's a paper gasket as well.

Re: Waterpump - OEM or Aftermarket [Re: WyrTwister] #5121219 05/31/19 10:34 AM
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Fitz98 Offline OP
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Originally Posted by WyrTwister
Originally Posted by Fitz98
98 Expedition 5.4 4x4
Anyone know how the Motorcraft OEM water pumps hold up compared to aftermarket?
I have mine off currently, works fine for now, but thinking since I have it off, I might as well replace it, since I don't know the history of this one (Used engine replacement a couple years back). Also had a problem with transmission fluid in my coolant, so don't know if there are any internal seals that may have been compromised, so I would rather replace than be sorry later.


Transmission fluid in coolant ? Can not think of any way that is related to the water pump ?

Most / all cars with automatic transmissions have a cooler for the AT fluid . This often is a " device " in the radiator , to transfer excess heat from the fluid to the coolant . There may be a leak there . ( With 2 lines from the AT to the radiator . )

If that is what is happening , I question whether the radiator can be repaired . Either replace the radiator or buy an external ATF cooler to mount in front of the radiator & re-plumb the lines from the AT , to the new external cooler .

But , if you have ATF in the coolant , check the transmission to be sure you do not also have coolant in the ATF . A messed up transmission is much more expensive than the radiator .

To me , this potentially is a MUCH larger issue than your original question .

I have already dealt with that part is a separate forum post. Now my objective is to replace anything in the cooling system with seals that have been exposed to the transmission fluid in the coolant.

Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121522 05/31/19 03:52 PM
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Fitz98 Offline OP
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I went with the dealer OEM. I am not sure what pump I took out. Could have been changed by someone else in the past.
Here is a side by side comparison.
OEM has a ring welded to the fins and has 6 fins whereas the other one has no ring and 7 fins.
OEM fins are 9 thousandths longer than other one I took out.
The OEM fins are about 1/4" less in overall diameter
Gauge thickness of the fins is about the same.
The one I took out also has 2 small pieces of casting off of 2 of the bolt holes, OEM does not have that.
This is a replacement motor, so not sure what it came out of, if the water pump is different for the motor I have in there now, or if the one I took out is an aftermarket water pump.
[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]

This is a replacement motor, so not sure what it came out of, if the water pump is different for the motor I have in there now, or if the one I took out is an aftermarket water pump.
Do you think these are the differences between OEM and aftermarket or is it possible the motor I have requires a different pump?

Re: Waterpump - OEM or Aftermarket [Re: Fitz98] #5121541 05/31/19 04:12 PM
Joined: Mar 2011
Posts: 532
F
Fitz98 Offline OP
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Joined: Mar 2011
Posts: 532
Just answered my own question, bolt holes don't line up, now the question is how do I identify what motor I have to find the matching pump, or how to identify the pump I took out to get the right one.
[Linked Image]

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