Jump to content

Serpentine destruction

jfonod

Recommended Posts

jfonod New Member

jfonod

Posted
Posted

I have just purchased a 2000 1500 Van with a V6, 192k on it. It has been claimed that its eating Serp-belts at a rate of about 3-4 a year. Supposedly 9 dealers have looked at it and are mostly stumped. The last one suggested there is a problem with the crank and recommended engine replace (sounds extreme to me). So does anyone know of a possible issue with these motors or anything else I may want to look at? Thanks Very Much :jester:

blue2kzr2 Enthusiast

blue2kzr2

Posted
Posted

Check the alignment of ALL pullies. If they don't line up within 1/8" or maybe even less, the belt will get eaten as you describe. This is the front of the pulley I'm talking about here. Check for endplay on the crank if the shop really suspects that part.

 

Also, what kind of condition is the tensioner in? The idler pulley?

Wingnut Senior Enthusiast

Wingnut

Posted
Posted

My 92 was eating belts like candy until I figured out that the idler pulley was trashed (the bearings in it more accurately).

 

But that's a slightly different setup.

tgroghan Enthusiast

tgroghan

Posted
Posted

My 92 c2500 pickup with the 7.4L was tearing thru belts. How are they coming apart? Mine would slice a 1/3" off the belt, all the way around. After so long I finally checked the idler pulley. It was metal and bent. I'm sure I bent it when I went to take off the belt one time. SInce it was metal it was cutting the belt down. I just replaced the whole idler pulley assembly (Autozone).

 

Good Luck

jfonod New Member

jfonod

Posted
  • Author
Posted

I just got the chance to really look. And it does look like the crank pulley is shimmy-ing back and forth a little bit. I guess its possible for this to happen, but man you'd think with that much play in a crank it would be leaking oil or making tons of lower end noise or something. But I am going to look over all the pulleys and we'll see what turns up-thanks to all.... :banghead:

  • 1 month later...
GMCSierra04 Enthusiast

GMCSierra04

Posted
Posted

Hi, I know that this is an old topic and I'm not sure if the problem was resolved but I happen to stumble on it any ways. One thing I have seen is that when voltage regulators tell the alternator to begin to put out more power, the magnetic field induced will make the pulley MUCH harder to turn. Especially with alternators reaching amerage outputs of 120 amps or more. If there were a problem where the voltage regulator was always telling the alternator to put out a lot of power, this would put a lot of stress on the belt. Just a sugestion if it still isnt fixed.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone
    • Brendan C
      2026 6.6 L5P oil cooler leaking oil at 4,000 miles

      By Brendan C · Posted

      New to diesel trucks. I happened to find my oil cooler leaking oil externally with only 4,000 miles on the truck. I didn’t realize this was an issue until I started researching it. Dealer is going to replace it under warranty but I’m wondering if there’s anything GM is working on to fix this issue. I’ve heard the oil filter used is the same as they use on their V6 motors and that’s what is causing the problems. Should I switch to a bigger filter or keep using the OEM recommended? 
    • Vu1can
      Seems to be Missing a lot of Updates

      By Vu1can · Posted

      So, GMCustomerService:  Judging by the Update History pictured above, is this truck missing any updates that it actually needs. If it's just for the infotainment system, the radio is working fine and no trouble with SeriusXM. and Android Auto is working fine wirelessly with my phone. Some months ago, an update notice was sent to my truck. I approved the update and it finished saying that the update was successful, but it seems that whatever that update was, it didn't actually get installed - at least not if I'm to go by the Update History shown above.   So, again, are there any updates that this truck really should have? I've checked with my dealer but they're reluctant or commit to anything and if I want them to check, they require a $200.00 fee just to check it out and then I'd have to pay for the actual update(s).    Ignorance is bliss, and if none of the updates goes to fixing any mechanical discrepancies, I'll just leave things as is.  
    • CNH-320
      Electrical Problem - solved

      By CNH-320 · Posted

      Hey everyone, I recently had an issue with my 07 2500HD GMT900. My DRL’s stay on at all times. Right front turn and right mirror turn signal indicator stay on solid at all times. By “at all times” I mean the only way to make them go off is disconnecting the battery. I tore the headlight assemblies out, tried disconnecting the harnesses to eliminate bad wiring at the harness, I unplugged the headlight switch, no change and the mirror turn signal still stayed on. My first thoughts were : Bad bulb and/or socket somewhere, under hood fuse panel bad, bcm bad, tail light or trailer wiring problem, or some random short to power in the harness.  Possibly a bad ground but unlikely. I had a big clue in the fuse panel, it had a burnt smell. I started pulling every fuse that had to do with DRL or right turn/park lamp. Nothing made the right directional turn off but pulling the DRL2 fuse made the DRL’s go out.  After studying wiring diagrams, I found that both problems had that fuse panel in common, the bcm also controls both problems but knowing the fuse panel had a burnt smell I removed and disassembled the fuse panel and found a little corrosion on the printed circuit board.  I ordered a new fuse panel from Amazon for like $260. When it arrived I installed it, and put everything back together, the problem was fixed. I figured the fuse panel needed to be replaced anyway so that was a logical place to start. Hopefully this story helps someone in the future. Regretfully I didn’t scan for codes before I did everything.
    • 2022LtTbZ71
      Service 4wd, ESC light, traction control light on, Service charging system (vehicle may stall)

      By 2022LtTbZ71 · Posted

      That stinks. I’m sitting on the side of the road right now with the same issue. Never had an issue before taking it in for the ground strap recall. Now I’m outside of warranty and they’ll probably want $200 just to diagnose what they already “fixed”. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...