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Cold start squeal

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Old Apr 21, 2012 | 09:13 PM
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Default Cold start squeal
My 396/425 let out two loud squeals upon cold start, only when reving it. No noise after driveaway. Started in neutral, clutch out.
Did not sound like a belt, and the alternator belt is tight. No power steering or brakes, no A/C. Drove it for an hour with no further noise. Never did it before. Is this possibly coming from the trans?

Dan
Last edited by dplotkin; Apr 21, 2012 at 09:17 PM.
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Old Apr 21, 2012 | 09:54 PM
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Belt can be tight, but glazed. Still would be my bet.
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Old Apr 21, 2012 | 10:20 PM
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Originally Posted by Dan Hampton
Belt can be tight, but glazed. Still would be my bet.
Its got to be a belt, squirt some transmission ATF on the belts and see for yourself...should go away at least for a short period of time
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Old Apr 21, 2012 | 10:59 PM
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Allrighty then, I'll look at that. Thanks.

Dan
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Old Apr 21, 2012 | 11:05 PM
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Possibly the water pump.
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Old Apr 22, 2012 | 09:13 AM
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Originally Posted by ricks327
Possibly the water pump.
Maybe a pump or alternator starting to seize, causing the belt to slip? Pull the belt and see if they spin freely.
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Old Apr 22, 2012 | 09:38 AM
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Originally Posted by mashinter
Maybe a pump or alternator starting to seize, causing the belt to slip? Pull the belt and see if they spin freely.
I had a bearing going bad in a near new alternator. It would make a noise on a cold start sometimes but it wasn't a squeal or a squeak. More of a groan. Maybe it was a cross between a squeak and a groan so it was a "grueak".

Wouldn't make any further noise while running but if you'd spin it with the belt off, you could hear a rough sound while the armature was turning.
Last edited by MikeM; Apr 22, 2012 at 10:00 AM.
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Old Apr 22, 2012 | 11:11 AM
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Originally Posted by Dan Hampton
Belt can be tight, but glazed. Still would be my bet.
Wire brush on gripping side will clean off glaze...be careful. OR try some Door-Ease from NAPA to lube.

Fred
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Old Apr 22, 2012 | 11:45 AM
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Last time I used belt dressing (on my 63 Galaxie) I ended up with more noise than I had. But I'll take your various advice & check the alternator, water pump, and de-glaze the belt.

Thanks for the help guys, as always.

Dan
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Old Apr 22, 2012 | 12:23 PM
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Lift the hood before you start it up cold and get that cat out of the engine bay!
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