Belt Help!!!!!!

[RichardJ]

>>but only one groove is being used on the crank pulley.<<

Want to run that past me again? Are you saying the PS belt only goes around the waterpump pulley?

[Duck.E]

Originally Posted by litew8

Loosen the belt as much as you can to see if/when it stops squealing, then gradually tighten up to where it starts squealing again. I'm guessing you know it isn't a bearing sound.

Didn't help, sloppy or tight still no change, goes away when you remove it though.

[Duck.E]

Originally Posted by RichardJ

>>but only one groove is being used on the crank pulley.<<

Want to run that past me again? Are you saying the PS belt only goes around the waterpump pulley?

One belt goes from crank pulley to water pump pulley to power steering pulley, the other belt goes from water pump pulley to alternator pulley. That belt does is not on the crank pulley. Only one groove is being used on crank, the first one closest to motor is not being used, it is not in line with any of the pulleys.

[Duck.E]

Originally Posted by RichardJ

>>but only one groove is being used on the crank pulley.<<

Want to run that past me again? Are you saying the PS belt only goes around the waterpump pulley?

That very well may be the problem, the crank pulley is probably for a short pump and I have a long and only one groove is being used powering it all.

[litew8]

Unless you've got the wrong setup going, are you sure it's a 'belt' squeal and not a bearing squeal (when under pressure)?

edit due to above post: You've got bigger issues. Did you just assemble this? or, I thought you were simply replacing.

[Duck.E]

Originally Posted by RichardJ

>>but only one groove is being used on the crank pulley.<<

Want to run that past me again? Are you saying the PS belt only goes around the waterpump pulley?

Originally Posted by litew8

Unless you've got the wrong setup going, are you sure it's a 'belt' squeal and not a bearing squeal (when under pressure)?

edit due to above post: You've got bigger issues. Did you just assemble this? or, I thought you were simply replacing.

Well I switched alternators thinking it was a bad bearing but same squeal. Even with the belt really loose and not a lot of pressure it still squeals. So IDK.

[Duck.E]

Originally Posted by litew8

Unless you've got the wrong setup going, are you sure it's a 'belt' squeal and not a bearing squeal (when under pressure)?

edit due to above post: You've got bigger issues. Did you just assemble this? or, I thought you were simply replacing.

I did not assemble this setup, trying to get it right from the person who did assemble.

[litew8]

You should be able to see if it truly is straight aligned with each pulley. If it looks off, chances are it is and isn't right. You have a pass. side setup (mines driver's) so I'm not sure. From what you've posted, maybe you have the wrong water pump? or, the alternator is mounted on the wrong side. not sure

[RichardJ]

>> the other belt goes from water pump pulley to alternator pulley. <<

That is the problem. No doubt about it.

You've got three accessories driven by the slack side of the PS belt. You have contact on around 90 degrees of the circumference of the water pump pulley to drive all three and as I said it's not on the tension side of the belt.

[Duck.E]

Originally Posted by RichardJ

>> the other belt goes from water pump pulley to alternator pulley. <<

That is the problem. No doubt about it.

Right, it doesn't touch crank at all because the first groove on the crank closest to motor is unusable because it doesn't line up at all. Only the second groove on the crank closest to radiator can be used because it lines up with first groove on water pulley and power steering. That crank pulley is probably the wrong one, for a short pump, my guess?.

[litew8]

Someone correct me if I'm wrong - long water pump (mounts to pass. side) is for A/C setups, and short (driver's side mount) isn't.

[litew8]

^ the above is referring to the alt. *mount placement differnce between long/short water pumps

[Stocker]

That pulley is waaaay too narrow for that belt....... said another way, that belt is riding waaaay too high in that pulley.

It's been said already, but get the right pulley and your problem should be solved.

[litew8]

Two different alternators have been installed; do they both have similar fitment in pulley? It looks fat in there, but so does mine, no issues here.

[swamp rat]

Originally Posted by litew8

Someone correct me if I'm wrong - long water pump (mounts to pass. side) is for A/C setups, and short (driver's side mount) isn't.

Sbc went to long water pumps after 73 if i remember correctly, the same year they moved the alt to the passenger side, it has no relation to air conditioning.

While your looking make sure the other pulleys are not worn so much on the V that they have bad contact.

[PanelDeland]

After looking at the pics,I'm guessing you have a mismatched pulley set.You should have everything driven off the crank pulleys.There should be one belt on crank,PS pump and Water pump.The other should be water pump,crank and alt.All of the drive is coming from the one belt around your crank and the accessories are too much for that to pull them.If you had a WP pulley with two equal sized grooves and belts running as I mentioned it would give you much more belt grip.

[Duck.E]

Originally Posted by PanelDeland

After looking at the pics,I'm guessing you have a mismatched pulley set.You should have everything driven off the crank pulleys.There should be one belt on crank,PS pump and Water pump.The other should be water pump,crank and alt.All of the drive is coming from the one belt around your crank and the accessories are too much for that to pull them.If you had a WP pulley with two equal sized grooves and belts running as I mentioned it would give you much more belt grip.

Ok so best solution then would be to get a different crank pulley, one that allows me to utilize both grooves and run alternator to water pump to crank, and the other one as is to ps to crank to water pump?

[swamp rat]

"run alternator to water pump to crank" Yes

"P.S to crank to water pump?" May not be possible, but P.S to Crank should be.

[leftybass209]

That belt routing looks funny.

[cleszkie]

Someone said it earlier here - both the power steering and alternator belts MUST go around the crank pulley. Period.

[luvbowties]

Originally Posted by Duck.E

After looking at the water pump pulley the groove that the alternator belt is on is about 1/16 smaller then the other groove on the water pump pulley. I don't know that the belt is slipping on the alternator pulley for sure, it could be the water pump pulley. I just assumed it was the alternator pulley. As far as the crank pulley grooves go, they appear to be the same, but only one groove is being used on the crank pulley. To me it looks like the belt sits to high on the alternator pulley and isn't flush, but I put one on there that was and it still squealed. I tried to take a better pic of set up. See below.

I can't see your crank pulley, but assuming the ps is pulled by it, why not try--just for an EASY & CHEAP experiment--running a short belt JUST from the water pump to the alternator? This will give a MUCH greater contact surface for the belt on both the alter AND water pump pulleys, AND eliminate any slippage caused by 2 apparently different-diameter pulleys on the water pump.
Sam

[luvbowties]

Originally Posted by luvbowties

I can't see your crank pulley, but assuming the ps is pulled by it, why not try--just for an EASY & CHEAP experiment--running a short belt JUST from the water pump to the alternator? This will give a MUCH greater contact surface for the belt on both the alter AND water pump pulleys, AND eliminate any slippage caused by 2 apparently different-diameter pulleys on the water pump.
Sam

Pls. DISREGARD this suggestion--I had not seen page 2 of the thread. My bad...sorry!

Also, IF the alter belt runs off ONLY the water pump pulley, then the 2 diff diam's on the water pump pulleys would be a non-issue. Therefore, I MUST agree with others' diagnoses that the alter pulley MUST be changed to fit the belt.
Sam

[litew8]

Two different alternators were used, both having the same pulley. I can't imagine having to change the pulley is something that should be needed. Either the wrong belts are being used (too short), or the wrong pulley (misalignment) is on the water pump. Each belt must wrap around, be driven by - the crank pulley. Some have said to change out the crank's pulley, I can't see it. Need better pics.

[Duck.E]

Originally Posted by swamp rat

"run alternator to water pump to crank" Yes

"P.S to crank to water pump?" May not be possible, but P.S to Crank should be.

Originally Posted by cleszkie

Someone said it earlier here - both the power steering and alternator belts MUST go around the crank pulley. Period.

Originally Posted by luvbowties

I can't see your crank pulley, but assuming the ps is pulled by it, why not try--just for an EASY & CHEAP experiment--running a short belt JUST from the water pump to the alternator? This will give a MUCH greater contact surface for the belt on both the alter AND water pump pulleys, AND eliminate any slippage caused by 2 apparently different-diameter pulleys on the water pump.
Sam

Originally Posted by litew8

Two different alternators were used, both having the same pulley. I can't imagine having to change the pulley is something that should be needed. Either the wrong belts are being used (too short), or the wrong pulley (misalignment) is on the water pump. Each belt must wrap around, be driven by - the crank pulley. Some have said to change out the crank's pulley, I can't see it. Need better pics.

After all was said and done, mismatched pulleys was the problem, as you guys pointed out. I was so concentrated on alternator pulley that I didn't even look at the bigger picture. I changed the crank pulley and all seems well so far. Thanks for all the help and posts, really appreciate it. Here are a couple pics of the truck.

[litew8]

Nice work and clean engine/truck! Thanks for the update, glad it's fixed.