1984 P30 454 Shredding Alternator Belt
As some of you may recall, I put a GM Performance crate 454 in my Allegro (I bought the rig with a blown engine). I swapped over the brackets and pulleys from the blown engine to the "new" engine. The...
Forum Discussion
USAFBILL wrote:
Had a similar problem on the same unit purchased used. Finally an old back yard mechanic told me that they had installed a rebuilt alternator from Mexico and that the rebuilt unit had a metric pulley instead of an American. Anyway he went to a junk yard and brought one back that he said was the right one. How true that was I do not know but it took care of my belt problem...Good luck
Could be. I had 2 alternators at one point, but one sounded crunchy when I rotated it so I tossed it. I hope I don't need a new alternator...
wolfe10 wrote:
The first photo clearly shows that the water pump and alternator are off-angle from each other. The water pump pulley really shows that the belt is at an angle.
I didn't think it looked that bad. In the third pic the PS pump belt is really out of whack. I wonder what's going on here? I'll have to take the belts off and make sure everything is tight.
MountainAir05 wrote:
Plus all the pulleys look really rusty. If pitted then any slip and it would rip up a belt.
Yes, they are. Believe it or not those were the least rusty of the set. I *think* I have the original water pump pulley with 3 grooves in it. If I do I'll pop it on and see if the PS pump and alt line up better. I had eyeballed them before I put the 2-groove pulley on and they appeared to be exactly the same except for the extra groove for the air pump.
cncsparky wrote:
I ended up using a mid mount alternator bracket. Much smaller belt and so far no problems. Part number 225R
I like that! I don't have access from the front. How hard is it to get at the alternator down there? There's a solenoid mounted on the stock bracket that I can relocate. What belt do you use with that?
96bounder wrote:
In my business (starter/alternator rebuild shop) I have experienced this on several occasons.Problem is the alternator belt is slipping and burning the belt off.By looking at pics of your alternator pulley I can tell its been very hot caused by belt slipping.
IIRC the 84 model uses either a 15 or 17 si delco alternator ,the units were a bear to pull and many had same problem you are having
Don't be afraid to tighten the belt.
try tighten the belt until you can turn engine by placing a wrench on nut on the alternator and rotating it.
After a run n time check belt tension again.
Yes it had been slipping, and I guess with the rusty pulleys it didn't last very long. I'm going to investigate more and install a couple of new belts - I'll get the alternator belt as tight as I can get it. It has a Jet Ride air bag system with a pretty big pump. It's a big draw at startup - you can hear the engine idle pick up when it shuts off.
