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  #46 (permalink)  
Old 11-07-2011, 09:20 AM
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glad i could help

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  #47 (permalink)  
Old 11-07-2011, 10:53 AM
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Quote:
Originally Posted by CHEVYRODS
The original belts and pulleys were working just fine on the engine when you took it out. This deal about the having to be same size pulleys is just crazy. There is a purpose on a factory application for the reduced size pulleys. . I'm sure you can find a picture on the net of your exact engine and I will bet you it won't have all the matching pulleys. Somebody has been shopping at speedy Bill's and Jegs to much. Large and small pulleys work just like gear size reduction and speed of what it turns. This is about as crazy as the comment about one belt turning one way and the other one turning the oppisite way. Lets see a picture of how you come up with that one.
If you are only running a alternator and PS pump both the pulleys have to be the same size. The crank pulley drives both of them first. If you use the smaller pulley in back the water pump pulley wants to run at 2 different speeds. It's a fact there is a night and day difference when you have the right size pulley on the water pump.
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  #48 (permalink)  
Old 11-07-2011, 12:42 PM
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Sorry CHEVYRODS i must have skipped over your post some how.. And yes this excatly how i pulled the engine from the motor home! And as far as the engine having a/c or anything else this it did not either.. only alt and powersteering. I did how ever remove the belts when i was pulling the engine and i believe i installed them the way i took them off?? I dont understand factory pulleys being wrong either but I'm not much on v-belt applications either..So if i have to buy other pulleys I will to solve the problem but I dont understand the purpose ? I do understand gears and ratios though and see the point in the reduction of the pulleys sizes also.. But i do appreciate everyones help with this!!
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  #49 (permalink)  
Old 11-07-2011, 01:07 PM
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Put your camera in movie mode and make a video of it running both the alternator and PS pump with the water pump pulley you have now. Then make a video of it running with the water pump pulleys that are the same size. You already know there is a problem with the way it is now. When the right pulley is put on you will be amazed at the difference.
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  #50 (permalink)  
Old 11-07-2011, 01:10 PM
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v8 i also appreciate your help !! And thanks for taking the time to post the pic! I'm kinda at a loss with this, it's a beautiful truck and the squealing is the attention getter not the truck lol!! Thanks again guys! (and gals??)
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  #51 (permalink)  
Old 11-07-2011, 01:22 PM
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Who knows why some thing were made the way they were. The picture of the water pump pulley I posted came off a V6. It bolts right onto a V8. If you look at the pictures of the chrome water pump pulleys they sell, they are both the same size. The V6 water pump pulley throws everything out of wack when it's put on a V8. It causes vibration and belt squeeling.
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  #52 (permalink)  
Old 11-07-2011, 02:37 PM
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Quote:
Originally Posted by V8&4spd
Who knows why some thing were made the way they were. The picture of the water pump pulley I posted came off a V6. It bolts right onto a V8. If you look at the pictures of the chrome water pump pulleys they sell, they are both the same size. The V6 water pump pulley throws everything out of wack when it's put on a V8. It causes vibration and belt squeeling.
So the pulley i have now is off of a V6? If so my buddy next door has a ton of junk 327's and 350's maybe i can find a new set of pulleys there!! Haven't looked at his yet , for what reasons i don't know lol! (would have been a good place to start huh)
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  #53 (permalink)  
Old 11-07-2011, 03:02 PM
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When swapping around a bunch of pulleys, please be careful and make sure the spacers and pulleys fit the shaft and don't just trust the bolts to hold things in center. I did this a long, long time ago and the first time I revved the engine up the water pump shaft snapped and the fan and pulley went through the radiator. It was off balance because even though the bolts lined up, the hole in the center of the water pump pulley was bigger then the shaft. It could have gone through me or my hand because I was leaning right over the engine. Chevy water pumps come in a lot of different sizes - big shaft, small shaft, short shaft, long shaft. Another thing to check when running v-belts is that the newer small block water pumps run or rotate opposite of the engine rotation. I saw a fellow use a reverse rotation (newer pump) in an older application and it blew the bottom hose off and cooked the motor. As you are finding out pulleys are not as easy as bolt on and go. The squeal may be coming from using mixed v-belt groove in the pulleys. Check and make sure that all of your pulleys have the same angle in the pulley groove. If you could find a complete set up from an older engine that would be the route to go. Good luck!
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  #54 (permalink)  
Old 11-07-2011, 03:17 PM
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Thanks for the info Chris!!
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Old 11-07-2011, 03:44 PM
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Quote:
Originally Posted by pontiacjosh
[IMG][/IMG]
this is mine without a power steering belt but just run the power steering belt to the crank to the power steering pump and you will be fine

Don't want to hurt anyone's feelings here but anytime I see people give information on belts and pulleys I like for it to be correct. As I stated earlier it is not something to take for granted! I know of a young fellow that was killed by a fan blade that came off. In the picture that you have shown here it would create two different speeds on the belts and the reason is because you have two different size groove diameters on your water pump pulley. The size of the alternator pulley and the size of the power steering pump pulley has no variation of speed in the two belts as long as the two groove diameters in the crank pulley and the two groove diameters in the water pump pulley have the same diameter. The water pump pulley you have shown has two different size diameters on it. This type of pulley would not use a belt that also went over the crank it would only use one of the two belts over the crank shaft and not both of them. A pulley such as you have shown could be used to drive another accessory but the belt that drives the second accessory could only be put around the water pump and not over the crank or they would fight each other and squeal and one of the two belts would wear out real quick.

I have drawn a picture that shows how it works with two belts over the crank and water pump. In this picture the two grooves of the pulley on the water pump are of the same diameter and the two grooves of the crank pulley are of the same diameter. The fact that the power steering pump has a different size pulley then the one that is on the alternator has no effect on belt speed.
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  #56 (permalink)  
Old 11-07-2011, 03:56 PM
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So Chris thanks for the diagram!! In this case w/the waterpump pulleys i have (of diff diameter) can i run the alt like you have it shown and the power steering off just the crank? I looked at my buddys 327 and 350"s and they have the same w/p pulleys that i have (one large one smaller)
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Old 11-07-2011, 04:36 PM
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Quote:
Originally Posted by gmc1990rodder
So Chris thanks for the diagram!! In this case w/the waterpump pulleys i have (of diff diameter) can i run the alt like you have it shown and the power steering off just the crank? I looked at my buddys 327 and 350"s and they have the same w/p pulleys that i have (one large one smaller)
You could make it work that way. It sounds like the only thing you have set up wrong is the water pump pulley. Once you have the water pump pulley that uses the same size pulleys on it you will be good to go. The fan belt you had driving the PS pump should be long enough to fit the correct water pump pulley once it's on there.
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  #58 (permalink)  
Old 11-07-2011, 04:46 PM
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Quote:
Originally Posted by V8&4spd
You could make it work that way. It sounds like the only thing you have set up wrong is the water pump pulley. Once you have the water pump pulley that uses the same size pulleys on it you will be good to go. The fan belt you had driving the PS pump should be long enough to fit the correct water pump pulley once it's on there.
Thanks Guys! I really appreciate all the responces and ya'lls help!!!
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  #59 (permalink)  
Old 11-07-2011, 06:03 PM
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Quote:
Originally Posted by gmc1990rodder
So Chris thanks for the diagram!! In this case w/the waterpump pulleys i have (of diff diameter) can i run the alt like you have it shown and the power steering off just the crank? I looked at my buddys 327 and 350"s and they have the same w/p pulleys that i have (one large one smaller)
You could do it that way (but) I like equal load on each side of the water pump when ever I can get it that way. You really need a double groove water pump pully where both pulleys are the same size diameter. Be sure and read my earlier post I have included it in this post. Make sure that you do not have a reverse rotation water pump and make sure that all pulleys have the correct size to shaft size on the center holes.

Quote:
When swapping around a bunch of pulleys, please be careful and make sure the spacers and pulleys fit the shaft and don't just trust the bolts to hold things in center. I did this a long, long time ago and the first time I revved the engine up the water pump shaft snapped and the fan and pulley went through the radiator. It was off balance because even though the bolts lined up, the hole in the center of the water pump pulley was bigger then the shaft. It could have gone through me or my hand because I was leaning right over the engine. Chevy water pumps come in a lot of different sizes - big shaft, small shaft, short shaft, long shaft. Another thing to check when running v-belts is that the newer small block water pumps run or rotate opposite of the engine rotation. I saw a fellow use a reverse rotation (newer pump) in an older application and it blew the bottom hose off and cooked the motor. As you are finding out pulleys are not as easy as bolt on and go. The squeal may be coming from using mixed v-belt groove in the pulleys. Check and make sure that all of your pulleys have the same angle in the pulley groove. If you could find a complete set up from an older engine that would be the route to go. Good luck!
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  #60 (permalink)  
Old 11-07-2011, 06:11 PM
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Thanks again Chris! Hopefully I'll have the right pulley in a few days and will give it a shot! Thanks again!!


Joey..
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