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Old 10-07-2011, 10:35 AM   #1
Join Date: Feb 2011
Location: Houston, Texas
Posts: 49
454 Fan Belts

One problem that I constantly have is keeping the V-belts on my engine. I know it is because I have pieced together three (3) belts that fit as best as possible but not the size or quality that should be on the engine. If anyone could help me get the correct belts and recommend a good manufacturer of the belt I would appreiate it greatly.

My engine does not have AC compressor on it, it does have an air pump.

Crank: 3 Pulleys
Fan/Water Pump: 2 Pulleys
Power Steering: 2 Pulleys
Air Pump: 1 Pulley
Alternator: 1 Pulley

1985 Pace Arrow L34
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Old 10-07-2011, 11:45 AM   #2
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Fleetwood Owners Club
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Location: Cherokee, Texas
Posts: 406
As discussed in a different thread, The removal of a AC compressor and associated brackets might be cause for misalignment of belts etc. The yr model of my winnebago chassis is 83. 454 Chevy. Your welcome to the brackets if they fit yours. I'm needing to scrap this and remove whats left within the next 2 weeks to make room for my Pace Arrow. Since its a 79 MH built on a 78 Chassis I've already removed most anything that will interchange.

1979 "Vintage" Pace Arrow 28 Ft,
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Old 10-07-2011, 01:18 PM   #3
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Download this Chevy MH Service manual http://www.bdub.net/manuals/P30/P30.pdf

Go to Appendix A (pdf page 216) where you will find drawings, GM part numbers and installation data for the GM 454 MH chassis belts (and radiator hoses). I believe you only have 2 belts;
Alternator-AIR Pump-WP-crank: GM: 14092344; Gates: 7450; NAPA: 25-7450; Dayco: 15450
PS-WP-Crank: GM 14087507; Gates: 7455; NAPA: 25-7455; Dayco: 15455

Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site: http://www.classicwinnebagos.com/forum/index.php
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Old 10-07-2011, 02:30 PM   #4
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Using a yard stick if room allows can also be of help. Placing it on edge along the pulleys looking for evenness with very little or no gaps. I have seen pulleys that the outside edges do not run smoothly even but did not effect the belts. One other thing to check when all belts are off. Make certain everything turns smoothly. If you have a smog pump which cause alot more problems then they ever solved will go through bearings faster then any other engine accessory. Make certain water pump, power steering pump etc all turns smoothly. Any roughness in turning any one item can cause issues. When hot they can try to seize up and eventually will.
1979 "Vintage" Pace Arrow 28 Ft,
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Old 10-07-2011, 03:15 PM   #5
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I've got an '87 that originaly had 2 air pumps. Both air pumps have been bypassed now, so thmy alternator belt size won't help you.

First belt to go on is from the crank to the PS pump It's a 41013 or 10A1040
Next belt goes from the crank to the water pump to the AC, and it's a 60015 or 11A1525. My last belt goes from the crank to the water pump to the Alternator (and in your case to the Air Pump) My belt is a 525K6 or 6PK1335. Yours will be a little longer. If you had the second air pump, the belt for that goes from the power steering pump to the air pump, but it doesn't sound like you have that one.

Don't feel bad, you aren't the only one that looses belts on the 454. Hope this helps you some.
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Old 10-07-2011, 07:44 PM   #6
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Location: Southwest Missouri
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454 belts

I have a 84 winnie chieftain with the same 454 and have a squeal that is most probably a belt. How hard are they to replace? I have looked and don't see a way to get at them. I wish I could do it myself.
Does anyone have any range idea of what it cost to have them replaced?
2007 four winds hurricane 31H
USN retired in 81
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Old 10-07-2011, 08:04 PM   #7
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as stated ck your alignment then buy strictly gates belts, i learned years ago on my gmc that cheaper belts would not last. i would get any where from three to six months and it would eat the belts, it is geared pretty low and i cruise at 3200 rpm to run 70 mph.
with the gates belts i have gotten seven or eight years on a set of belts and then replaced them on a p.m. basis.
they will run a few bucks each higher but in the long run more then worth the piece of mind and plus they are American made.

good luck and happy travels
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Old 11-01-2011, 04:47 PM   #8
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454 tossing belts

Hey Jed, I had the same problem and on two occassions did not know the belt had been thrown until I saw my Temp gauge red line. Listen, the only real solution is to replace the belt system running you water pump, Alt, Air pump with a flat belt. Go to the wrecking yard and find a chevy or gmc truck with a split system on it. The power steering pump will still run on a V-belt. I paid $20, and pulled it myself, along with 100amp Alt which turned out good. The brackt mount will bolt right up in perfect alignment. I took all of the pulleys too. I bought a new Air Pump with the pulley for a flat belt. You have to look around a bit as Chevy/gm only porducted this split system for a couple of years. I am going on two years since the install and not one belt toss and no more squealing belts on cold start ups either. Get rid of the v-belt if you can, you will not regret it. Peace, Dan
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Old 05-15-2014, 12:47 PM   #9
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i am working on a 1982 cheiftain with a 454, the air pump is siezed and am going to pull it off. what size belt will i need to bypass it?

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