The drive belt on my 85 Fiero 2.5 has been a little noisy ever since winter ended. It would squeal for a few seconds after it started, then be fine. Then it hopped off the pulleys while my brother was driving it to work and overheated. Everything is fine, though it took us a while to figure out the belt was missing. I bought a new belt and put it on and everything was fine until I turned onto my street and it overheated again. Made it home and put the belt back on. It twisted, so I fixed it. Started it up again and it was fine. Shut it off to clean things up, started it up for a run around the block, and the belt flipped around on me again. Why is this happening? My father says the symptoms indicate we might have the belt on the wrong channels in the pulleys or the pulleys may be misaligned. But I can't find anything that says how the belt is supposed to be installed and I'm frustrated. Anybody have some helpful input?
I think your vehicle has a belt idler pulley. Sounds like might be shot therefore proper tension is not being kept on the belt. To check, put a wrench on the pulley bolt and if you can move the tensioner without much effort you have found your problem.
I think your vehicle has a belt idler pulley. Sounds like might be shot therefore proper tension is not being kept on the belt. To check, put a wrench on the pulley bolt and if you can move the tensioner without much effort you have found your problem.
I'm fairly certain the 2.5 doesn't have a tensioner.
I'm fairly certain the 2.5 doesn't have a tensioner.
Nope, not on the 85 2.5.
The noise right after starting means it's slightly loose, I was always able to get the noise to go away by retightening the belt. After a while it needs to be replaced, however. I replaced mine every year when I was daily driving the car.
On my 84, I put a breaker bar through a hole in the alternator bracket, and apply tension to the top mounting bolt, and tighten it with a ratchet and socket, then tighten the pivot bolt and nut. There should only be about half an inch of deflection at the point between the alternator and water pump.
Which grooves on the pulley vary depending on a few different factors. If you post pictures of the water pump and crank pulleys, I can tell you which ones to use.
Likely you over tighten or alt or wp are bad. Either will break belt Cord layer cause flip belts. Flip belts are dead belts.
Has data of V belts too... See my Cave, Serpent Belt
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
Likely you over tighten or alt or wp are bad. Either will break belt Cord layer cause flip belts. Flip belts are dead belts.
Has data of V belts too... See my Cave, Serpent Belt
Before the new belt jumped off, everything was working perfectly, so I don't think there's a problem with my water pump or alternator.
I think my problem might actually be that when my dad installed the new belt (he gets carried away when he's around to help on the car, so it usually turns into him working on the car instead of helping me), he got it twisted. So it hopped off again and got wrecked, which is why it won't stay on anymore. There also could very well be antifreeze and/or oil on the pulleys.
Originally posted by PurpleGryphon: There also could very well be antifreeze and/or oil on the pulleys.
Ah Why? the outside of that should be dry all over is there a leak or did someone spill something on the belts/pulleys? Get a new belt and put it on yourself but before you do that clean off all the pulleys with something like brake clean and a rag.
Steve
------------------ Technology is great when it works, and one big pain in the ass when it doesn't
Ah Why? the outside of that should be dry all over is there a leak or did someone spill something on the belts/pulleys? Get a new belt and put it on yourself but before you do that clean off all the pulleys with something like brake clean and a rag.
Steve
Because when it overheated, there was coolant spray in the engine bay (from the pressure relief cap next to the valve cover) and my crank case breather gasket is torn, so I have a slight oil leak on the top of my valve cover.
I think the actual problem is that I washed it last week and didn't cover the belt. I used wax for the first time since I bought the car and within a few days, this happened.
I just bought a new Gates belt (the last one was a MasterPro) and I'm going to thoroughly clean the pulleys before I put it on. They all spin normally too, so it doesn't seem to be a water pump or alternator issue.
Got the pulleys cleaned and the new belt on. Ran it out a few miles and back, hitting about 3K RPM in the process. Everything seems to be working fine.
However, there is a weird whistling noise coming from the belt/pulley side of the engine that gets louder/higher pitched as the RPM build. At idle, it's only detectable if I hold my ear near the gap between the engine and the side of the engine bay, but I can hear it from the driver's seat when accelerating. It gets mostly drown out by road noise when running at 60 MPH around 3K RPM, but not completely. I cannot seem to pinpoint exactly where it's coming from, but the source seems closest to the alternator.
Got the pulleys cleaned and the new belt on. Ran it out a few miles and back, hitting about 3K RPM in the process. Everything seems to be working fine.
However, there is a weird whistling noise coming from the belt/pulley side of the engine that gets louder/higher pitched as the RPM build. At idle, it's only detectable if I hold my ear near the gap between the engine and the side of the engine bay, but I can hear it from the driver's seat when accelerating. It gets mostly drown out by road noise when running at 60 MPH around 3K RPM, but not completely. I cannot seem to pinpoint exactly where it's coming from, but the source seems closest to the alternator.
anyone have the proper belt routing for the 85 2.5?
Couldn't be easier: alternator belt goes on the inside groove of crank and water pump to alternator, a/c belt goes on out groove of crank and water pump to compressor
