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So, I got an E99 7.3. Done some work to it, but I have one issue. About a month ago, I changed the belt, the A/C Compressor rack that’s on the passenger side that included the Tensioner, idler pulley, and the A/C Compressor. Didn’t have a squeak up until a couple days ago, it came back. The belt seems like it’s almost wanting to start melting it has a weird like look to it, so today I’m going to be replacing it, but is there anything I could be missing? None of the pulley’s seem to have a vibration or anything to them, PS pulley seems normal, alternator seems good, everything seems fine I just don’t understand.
Like Tpayne621, I bought a Gates Fleetrunner (green) belt in March of 2016 and it has been silent and great. The part number I used on Rock Auto was "GATES K081223HD" for the single alternator belt. If you go with Rock Auto, use the discount code link below.
Had the same problem! I would have sworn it was the tensioner, but it turned out to be the new belt. Got another new one, and saved the other as a squeaky spare.
While the belt is off, deglaze the water pump pulley. It has been known to slip badly under load and was the cause of MULTIPLE overheating events on my truck, all while pulling the trailer up a mountain pass.
Like Tpayne621, I bought a Gates Fleetrunner (green) belt in March of 2016 and it has been silent and great. The part number I used on Rock Auto was "GATES K081223HD" for the single alternator belt. If you go with Rock Auto, use the discount code link below.
Like Tpayne621, I bought a Gates Fleetrunner (green) belt in March of 2016 and it has been silent and great. The part number I used on Rock Auto was "GATES K081223HD" for the single alternator belt. If you go with Rock Auto, use the discount code link below.
If you're going to replace hoses, why not get the Ambulance package upper hose that goes around behind the belt? You'll never have to take off the upper hose again just to remove the belt for whatever reason in the future?
While the belt is off, deglaze the water pump pulley. It has been known to slip badly under load and was the cause of MULTIPLE overheating events on my truck, all while pulling the trailer up a mountain pass.
that seems more like what it going on, my current belt has a lot of like weird wear marks of almost heat and it has like burnt up feel to it. What would you recommend?
Last edited by Dalton Durbin; Mar 24, 2023 at 11:24 AM.
that seems more like what it going on, my current belt has a lot of like weird wear marks of almost heat and it has like burnt up feel to it. What would you recommend?
What I did for mine was to take a dremel with a sanding wheel on it, belt removed and move side to side on the contact surface of the pulley and got rid of the mirror smooth finish. I was having a terrible time of overheating for years with my truck due to the fact that the radiator fan was locking up and generating more drag than the pulley could keep up with. Basically the water pump would stop turning when I needed it the most such as pulling the trailer up a mountain pass on a hot day. The radiator fan would come on with a roar and then it would gradually fade out to silence and the temperature would rise up to the red zone. Only way I could make it to the top of the pass without boiling over was to slow WAY down, shift down to 3rd gear and 1/4 throttle it up the hill with the AC turned off.
Full story here, two different threads if you are interested. https://www.ford-trucks.com/forums/1...uty-7-3-a.html https://www.ford-trucks.com/forums/1...superduty.html
Anyway, here is the picture of both pulleys and the one on the bottom is how you want your pulley to end up looking like. The upper one is a Superduty pulley like we all have from the factory, and the one of the bottom is off of an OBS 1993-1997 diesel.
Upon installation of the pulley, all the glazing that was on the belt disappeared, all the squeaking died out and I haven't had yet a chance to really test it out, but I'm confident that all my overheating problems are cured with this setup. The OBS pulley is larger in diameter and therefore has greater mechanical advantage to actually put power to the water pump/radiator fan assembly and keep the cooling system working even under heavy load.
While the belt is off, deglaze the water pump pulley. It has been known to slip badly under load and was the cause of MULTIPLE overheating events on my truck, all while pulling the trailer up a mountain pass.
Originally Posted by Kwikkordead
What I did for mine was to take a dremel with a sanding wheel on it, belt removed and move side to side on the contact surface of the pulley and got rid of the mirror smooth finish. I was having a terrible time of overheating for years with my truck due to the fact that the radiator fan was locking up and generating more drag than the pulley could keep up with. Basically the water pump would stop turning when I needed it the most such as pulling the trailer up a mountain pass on a hot day. The radiator fan would come on with a roar and then it would gradually fade out to silence and the temperature would rise up to the red zone. Only way I could make it to the top of the pass without boiling over was to slow WAY down, shift down to 3rd gear and 1/4 throttle it up the hill with the AC turned off.
Full story here, two different threads if you are interested. https://www.ford-trucks.com/forums/1...uty-7-3-a.html https://www.ford-trucks.com/forums/1...superduty.html
Anyway, here is the picture of both pulleys and the one on the bottom is how you want your pulley to end up looking like. The upper one is a Superduty pulley like we all have from the factory, and the one of the bottom is off of an OBS 1993-1997 diesel.
Upon installation of the pulley, all the glazing that was on the belt disappeared, all the squeaking died out and I haven't had yet a chance to really test it out, but I'm confident that all my overheating problems are cured with this setup. The OBS pulley is larger in diameter and therefore has greater mechanical advantage to actually put power to the water pump/radiator fan assembly and keep the cooling system working even under heavy load.
thank you I’ll get it done hopefully fixes my problem
