Squeal

[ArmyChief]

New to the site, so hopefully this question is in the right thread. If not, mods please move.

1982 K10 with 305 and manual transmission has a horrible squeal while at idle. Replaced the belts with no change. Squeal sounds like a belt squeal, but goes away with the slightest pressure applied to the clutch pedal. There is no sounds within the clutch that make me think it's a throwout bearing. Any help would be greatly appreciated.

 

[Rusty Nail]

K.

There is a lot of stuff turning on the front of that engine. Many parts in motion.
If it were ME, I would remove the belts (one at a time) and observe for change.

Good luck!

 

[87ChevyR10]

IF the vehicle has A/C, the pulley bearing on the compressor (or the compressor itself) can seize causing belt squeal. Or the power steering pump can cause belt squeal if it's trying to seize. However, if it goes away just pressing the clutch, that would make me think it's clutch-related somehow. The RPM difference shouldn't be significant.

Do as Rusty suggested. You won't hurt anything removing the belts.

 

[austinado16]

The suggestion of removing all the belts is good. If you still have a squeak, and I think you will, crawl under and inspect the clutch arm adjustment in order to make sure that throwout bearing isn't being partially engaged at all times. You may have a failed slave cylinder, or a failed flex hose between the slave and the hard line from the master cylinder......they'll act like a check valve and not completely relieve pressure, so the clutch arm is always held partially "engaged." It won't be the pilot bearing, because those are only actually spinning during the short period between shifts, or when the clutch pedal is fully on the floor.

 

[stlbob]

Throw out bearing,just did a truck about this age in the shop..Same type of complaint..If it has v groove belts only remove one at a time.Restart and listen..

 

[Mr Clean]

Yeah, I was thinking throw out bearing also. If you are barely touching the clutch pedal, and it goes away, it has nothing to do with your belts.

 

[ArmyChief]

Thanks, all. Replacing the entire clutch this weekend.