Serpentine belt thrown twice on a 1988 C1500 5.7 350 Silverado

[Supercharged111]

Wouldn't the compressor be difficult to turn by hand, normally?

Yes, but it wouldn't normally make a bunch of noise when in use and make the truck shake.

 

[Slade88]

With some more fiddling around I noticed a small amount of play inbetween the power steering pulley and pump, enough to make a small clanging sound when I push it back and forth, maybe a millimeter or so of play? Could this cause the belt to get thrown twice?

 

[User_name]

You already know the ps pump is bad, replace it

 

[Schurkey]

Ehhh. I think that's just PS pump end-play.

 

[Jeepwalker]

You can buy a kit to rebuild the ps too. (if you want to keep yours)

 

[User_name]

Oh!, I misread. I skimmed too fast and though he said the pulley it's self was moving. My apologies @Schurkey

 

[Slade88]

I wish I had the funds to replace all these parts, hope bossman gives me more hours, should I replace the tensioner and pulley first? I don’t want to sacrifice anymore belts

 

[Supercharged111]

I wish I had the funds to replace all these parts, hope bossman gives me more hours, should I replace the tensioner and pulley first? I don’t want to sacrifice anymore belts

That and don't run the AC.

 

[Slade88]

That and don't run the AC.

I forgot to mention I made sure to turn the ac off before the second belt snapped, does that narrow it down any further? Wouldn’t it HAVE to be the tensioner at that point? The belt never felt loose. Could it have been too tight due to the basically locked up tensioner that didn’t want to let off pressure on the belt

 

[Jeff Janssen]

I forgot to mention I made sure to turn the ac off before the second belt snapped, does that narrow it down any further? Wouldn’t it HAVE to be the tensioner at that point? The belt never felt loose. Could it have been too tight due to the basically locked up tensioner that didn’t want to let off pressure on the belt

depends if your system was set to "DEF". In my understanding, when "Defrost" setting is selected the compressor still turns on to keep things lubricated in the off season. But it sounds to me like it was concluded your tensioner went bad... a bad tensioner will throw a belt in my experience. I'd start with that.