Engine Squeal Help
Thread Starter
Teching In
Joined: Mar 2011
Posts: 15
Likes: 0
Engine Squeal Help I need some validation before I go dump a bunch of time and money.
Here's what I have.
LS-1 installed in a Porsche 911. Custom Alternator bracket, factory a/c compressor location. Short nose Camaro harmonic balancer. 1 belt to Alternator, 1 to Compressor. No other accessories. The alternator is tightened the old school way and it's never squealed. The tensioner and idler on the compressor are both new. Squeal sounds the same with the a/c on as it does off. Squeal disappears if I take the a/c belt off.
I think the culprit is the harmonic balancer. Since the compressor sounds the same on and off, it can't be that - unless by some weird coincidence both sets of bearings failed at the same time.
The a/c was recently installed but the compressor was always on the car - albeit with an old non-tensioning tensioner.
What do y'all say? Make sense?
Here's what I have.
LS-1 installed in a Porsche 911. Custom Alternator bracket, factory a/c compressor location. Short nose Camaro harmonic balancer. 1 belt to Alternator, 1 to Compressor. No other accessories. The alternator is tightened the old school way and it's never squealed. The tensioner and idler on the compressor are both new. Squeal sounds the same with the a/c on as it does off. Squeal disappears if I take the a/c belt off.
I think the culprit is the harmonic balancer. Since the compressor sounds the same on and off, it can't be that - unless by some weird coincidence both sets of bearings failed at the same time.
The a/c was recently installed but the compressor was always on the car - albeit with an old non-tensioning tensioner.
What do y'all say? Make sense?
TECH Junkie
Joined: May 2012
Posts: 3,048
Likes: 714
From: Poplarville, MS
The bearing in the compressor pulley is spinning at all times with the compressor clutch engaged or not. I have seen compressor pulley bearings go out and the belt would squeal if the compressor clutch engaged or not. If the compressor was bad the belt would only squeal with the compressor clutch engaged. For the belt squeal with the compressor clutch disengaged something is putting a load on the belt and the only thing that I can think of would be a bearing that is going out in the compressor pulley.
Last edited by bbond105; Jun 5, 2016 at 11:10 AM.
