Belt Problems, Looking For Advice
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
It's not "a shorter belt" - well it is but it's the same model.
I suppose it could be the tensioner. The idler and dummy and PS pulleys are all new.
Anyway like I said unless it gets really cold again there's no way to look at it when it falls off because it won't fall off again. I still need to be able to replace the belt!
Lead Driver
Joined: Jun 2021
Posts: 5,221
Likes: 805
I don't. Sorry, I wasn't clear. That's what I was referring to when I said that I don't have emissions. Maybe I used the wrong term? I don't actually know what an air pump is, I thought it was for emissions. I also don't see a place to attach a "dummy" pulley, but I will look again when it's warmer out.
To me, if you have the SMOG pump and its not seized, reinstall it and put the belt on on (new one) from an auto store and then tension it. If problem goes away youre looking at an entirely legnth based issue + belt wrap.
Lead Driver
Joined: Jun 2021
Posts: 5,221
Likes: 805
Thanks for your time but I don't think any of this applies to my situation.
For one thing, the belt falls off by the time I walk from the cab to the hood, and no I do not have anyone else to help me. Also it only happens in extreme cold, which we're probably done with for the year.
And maybe I'm just stupd but I don't see marks on the tensioner?
For one thing, the belt falls off by the time I walk from the cab to the hood, and no I do not have anyone else to help me. Also it only happens in extreme cold, which we're probably done with for the year.
And maybe I'm just stupd but I don't see marks on the tensioner?
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
so youre missing an entire accessory that both wraps he belt in the corner of the belts outer reaches, And you are missing something that adds a considerable amount of length to your belt, allowing you to purchase it for "the accessory" drive you have.
To me, if you have the SMOG pump and its not seized, reinstall it and put the belt on on (new one) from an auto store and then tension it. If problem goes away youre looking at an entirely legnth based issue + belt wrap.
To me, if you have the SMOG pump and its not seized, reinstall it and put the belt on on (new one) from an auto store and then tension it. If problem goes away youre looking at an entirely legnth based issue + belt wrap.
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
the 5.0 and 5.8 engines do not use marks on the tensioner body from the OEM. If your belt was stretched so much that the tensioner is on the "stop" or close to it, the cold temp could have been all it needed to just walk itself off. but temps rising allow it some fluid behavior lol
Mountain Pass
Joined: Jan 2005
Posts: 116
Likes: 31
From: Langley B.C.
For a replacement most would get a smog pump delete bracket with pulley like the one from Ford Racing (#68110). To determine a proper belt you could use a belt tension gauge like the Gates "Krikit", for a 5.8L the minimum tension should be 51lbs. For reference I recall a gain of 30 lbs in tension with a belt that was 1 inch shorter than stock due to a slightly smaller delete pulley.
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
For a replacement most would get a smog pump delete bracket with pulley like the one from Ford Racing (#68110). To determine a proper belt you could use a belt tension gauge like the Gates "Krikit", for a 5.8L the minimum tension should be 51lbs. For reference I recall a gain of 30 lbs in tension with a belt that was 1 inch shorter than stock due to a slightly smaller delete pulley.
This is coming together well. Thank you everyone, and I'll post back when I know more.
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
Oh man, just saw the price. $120. How certain are you guys this is what I need to do? I've already sunk a bunch of money into this damned truck, I've driven it about 800 miles in three years, and it never seems to end. $120 is definitely doable, but there's such a thing as throwing bad money after good. Is there something I can check to make *sure* that I need this?
(Unless someone knows a cheaper way to buy it?)
(Unless someone knows a cheaper way to buy it?)
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Lead Driver
Joined: Jun 2021
Posts: 5,221
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Oh man, just saw the price. $120. How certain are you guys this is what I need to do? I've already sunk a bunch of money into this damned truck, I've driven it about 800 miles in three years, and it never seems to end. $120 is definitely doable, but there's such a thing as throwing bad money after good. Is there something I can check to make *sure* that I need this?
(Unless someone knows a cheaper way to buy it?)
(Unless someone knows a cheaper way to buy it?)
now, if you want to NOT use this, I seem to recall maybe it was @rla2005 pr @Hit Man X who had deleted that pulley and found a new belt and srouted it the same way as apparently some 302 mustangs came factory?
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
I was able to remove the smog pump and not use an idler in place of it on my old 1992 F350 w/5.8L engine. It used the same tensioner and routing as the top photo that AuroraGirl posted. The tensioner and belt routing the OP has is not as friendly since one of the belt idler pulleys is above the tensioner. There is less wrap which can causes issues.
Lead Driver
Joined: Jun 2021
Posts: 5,221
Likes: 805
I was able to remove the smog pump and not use an idler in place of it on my old 1992 F350 w/5.8L engine. It used the same tensioner and routing as the top photo that AuroraGirl posted. The tensioner and belt routing the OP has is not as friendly since one of the belt idler pulleys is above the tensioner. There is less wrap which can causes issues.
Thread Starter
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Tuned
Joined: Jun 2023
Posts: 318
Likes: 25
thats why i said find another smog pump, a used one. they gotta be plentiful in yards. just have it blowing air aimlessly, because that will give your belt factory proper function.
now, if you want to NOT use this, I seem to recall maybe it was @rla2005 <acronym title="Page Ranking">pr</acronym> @Hit Man X who had deleted that pulley and found a new belt and srouted it the same way as apparently some 302 mustangs came factory?
now, if you want to NOT use this, I seem to recall maybe it was @rla2005 <acronym title="Page Ranking">pr</acronym> @Hit Man X who had deleted that pulley and found a new belt and srouted it the same way as apparently some 302 mustangs came factory?
The second nearest JY to me costs $300 in gas to get to (and from). So, a JY part is not better here. But I appreciate the idea.
I will pay the $120 if it will work. It would be nice to get this car running to the point where I can drive it more than 5 miles without fear of its breaking down. $120 would be worth it for that. I'm just wondering how sure people are that - given my engine bay - this part will do the trick?
Do I take it that @rla2005 is saying that the trick you used will not work with my layout? Those two engine bays do look different to me, but I am not smart so who knows?
Laughing Gas
Joined: Dec 2005
Posts: 904
Likes: 115
From: Laurel, MS
When I was having problems with my 5.8L throwing belts I learned 2 things:
1. The crankshaft pulley from a '79-'93 mustang has a more pronounced lip that helps keep the belt on, and it bolted right into place on my truck. It also is a smaller diameter than the truck pulley, so it acts as an underdrive pulley (but also means you'll need a shorter belt).
https://lmr.com/item/LRS-8221B/musta...t-pulley-79-93
2. ***Probably the real issue *** - The power steering pulley is a press-fit and is possible for it to not be pressed on all the way, causing it to be slightly misaligned with the other pulleys.
1. The crankshaft pulley from a '79-'93 mustang has a more pronounced lip that helps keep the belt on, and it bolted right into place on my truck. It also is a smaller diameter than the truck pulley, so it acts as an underdrive pulley (but also means you'll need a shorter belt).
https://lmr.com/item/LRS-8221B/musta...t-pulley-79-93
2. ***Probably the real issue *** - The power steering pulley is a press-fit and is possible for it to not be pressed on all the way, causing it to be slightly misaligned with the other pulleys.
