Replacement 7.3 serpentine belt- Correct part # - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 01-28-2011, 05:30 PM   #1 (permalink)
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Replacement 7.3 serpentine belt- Correct part #

Hey All,

I want to replace my serpentine belt. (Called out as a "Drive Belt" on Ford Parts.Com) Apparently, there are 2 different Motorcraft part #'s for my truck's configuration. I have the build sheet for my VIN and it shows no "cold weather package". I do have California Emissions Package and a Block Heater. (Maybe the block heater is the cold weather package??)

These are the 2 choices:

Motorcraft # JK8-1227

7.3L; Single alternator; Without cold weather package.

Motorcraft # JK8-1223-AA

7.3L; Single alternator; With cold weather package.

I was wondering if someone has the same truck I do and knows the correct Motorcraft part #, thanks.

As I side note, I hate how Ford Parts.Com has you enter your VIN to make sure you get the right part, but then the search results still show you parts for every different engine and option. You would think that the search results would be directly tied to the VIN!!!

If anyone has a better source for accurate parts, I'm all ears too.
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1999 F450 7.3 PSD CC 4x2, Roll-A-Long Hauler Bed, 15,000 GVWR, 26,000 GCVWR, PacBrake PBRX exhaust brake, HP625 frame mount compressor, 5 gallon air tank, AIRSAFE 25K Air hitch & KSH 80 Gal Aux Tank/Tool Box, aft OEM 25 Gal Fuel Tank

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Old 01-28-2011, 05:58 PM   #2 (permalink)
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You need the Motorcraft # JK8-1223-AA.

It is 122.3" long and is the most common belt on our trucks.
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Old 01-28-2011, 09:14 PM   #3 (permalink)
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Cold Weather Package

Here is a link to a description of the cold weather package. Maybe this will help you to figure out whether or not you have it.
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Old 01-29-2011, 04:20 PM   #4 (permalink)
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Why does the cold weather package impact belt size?

Are there PSDs that came without the cold weather package? Isnt the block heater standard, as well as the EBPV? (maybe some PSDs made for other countries??)
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Old 01-29-2011, 07:40 PM   #5 (permalink)
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Quote:
Originally Posted by jgarden View Post
Why does the cold weather package impact belt size?
Excellent question that I too would love to see explained..
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http://www.laura-n-sasha.com/

1999 F450 7.3 PSD CC 4x2, Roll-A-Long Hauler Bed, 15,000 GVWR, 26,000 GCVWR, PacBrake PBRX exhaust brake, HP625 frame mount compressor, 5 gallon air tank, AIRSAFE 25K Air hitch & KSH 80 Gal Aux Tank/Tool Box, aft OEM 25 Gal Fuel Tank

http://www.thedieselstop.com/forums/...f-450-304.html

2006 FR Sandpiper Sport F37 Toyhauler, 16K GVWR, 7K axles, 17.5" Wheels, 600W Solar

SOLD: 2005 F350 SuperDuty 6.0 PSD Auto Crew Cab Long Bed 4x4 SRW Lariat
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Old 01-30-2011, 11:27 AM   #6 (permalink)
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Per my knowledge the only difference regarding Serpentine Belt size is whether you have one or two alternators. I replaced my Serpentine Belt with a new Napa P/N: NBH25081223HD (Gates Micro-V VK081223HD Green Stripe FleetRunner) heavy duty 8 rib Serpentine Belt. At the same time I replaced the Top Radiator Hose with a new NAPA P/N 066 Rerouted Curved Hose ( 6A31 EBP 80MH70 ZDS 0143) (For 2 Alternators Kit) that allows the Serpentine Belt to be changed without removing the Top Hose. I saved my original Motorcraft Serpentine Belt which was in good serviceable condition and be kept it as a spare.
Jim
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Old 01-30-2011, 01:29 PM   #7 (permalink)
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The dual alternator belt 138 1/8" long.

I have not seen any information on why the "Cold Weather Package" changes the belt, but I imagine it has something to do with the alternator pulley size. I do know that if you put the longer 122.7" belt on in lieu of the 122.3" belt it will work, but you will get strange sounds from the belt as is is not tensioned properly. It will vibrate at idle from the alternator down to the PS pump.
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2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....

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Old 01-30-2011, 02:48 PM   #8 (permalink)
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Thanks Ken... just had an "ah-ha!" moment. I have that odd vibration from the alt to the ps pump. Wrong flip'n belt. Nice.

God bless
Robert
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Old 01-30-2011, 07:25 PM   #9 (permalink)
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Yeah ask me how I know that they vibrate! Not very happy when I figured out they gave me the wrong part. Now I just order everything through Tousley Ford Parts.
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2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....

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