Squealing
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Squealing
So cruising about 55 I suddenly got a squealing noise and I look down and temp rose a little more than normal. Backed off mph and squealing stopped and temp held. Come to down shifting to a stop light temp needle comes down. The temp needle has never done that. Ever. Start getting back up to 55 temp rises and levels off. Get home no leaks anywhere from the pump. So. Is it bad water pump bearing, thermostat, or loose and worn out power steering belt? Any info would be appreciated. Thanks.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
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From: Cool Northern Michigan
If I had to take a wild guess, I would say your ALT is on its last leg.
Belt squeal, gauges rise & fall maybe not receiving full voltage.
You can always take a voltage reading at the back of the ALT. Better yet, figure a way to get a reading going down the road.
Belt squeal, gauges rise & fall maybe not receiving full voltage.
You can always take a voltage reading at the back of the ALT. Better yet, figure a way to get a reading going down the road.
Is my vette stock?? HAHA
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Start your motor and use a mechanic stethoscope on the case of the alternator and the water pump. If its a bearing you can hear it when you change engine rpm.
Clutch fans can fail but they ussually dont squeal. Bearings squeal, fan belts squeal.....
If The motor is hot the clutch fan should be tight but not seized or easy to turn. At highway speeds the fan is along for the ride, the air flow does the cooling. I would lean towards an issue else where. I would start with the water pump since your temp gauge changes, is it mechanical or stock electric.
As for the alternator i have never had one that went bad change other gauges readings other than the voltage reading. Do you have an amp gauge or volt gauge....
Clutch fans can fail but they ussually dont squeal. Bearings squeal, fan belts squeal.....
If The motor is hot the clutch fan should be tight but not seized or easy to turn. At highway speeds the fan is along for the ride, the air flow does the cooling. I would lean towards an issue else where. I would start with the water pump since your temp gauge changes, is it mechanical or stock electric.
As for the alternator i have never had one that went bad change other gauges readings other than the voltage reading. Do you have an amp gauge or volt gauge....
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Start your motor and use a mechanic stethoscope on the case of the alternator and the water pump. If its a bearing you can hear it when you change engine rpm.
Clutch fans can fail but they ussually dont squeal. Bearings squeal, fan belts squeal.....
If The motor is hot the clutch fan should be tight but not seized or easy to turn. At highway speeds the fan is along for the ride, the air flow does the cooling. I would lean towards an issue else where. I would start with the water pump since your temp gauge changes, is it mechanical or stock electric.
As for the alternator i have never had one that went bad change other gauges readings other than the voltage reading. Do you have an amp gauge or volt gauge....
Clutch fans can fail but they ussually dont squeal. Bearings squeal, fan belts squeal.....
If The motor is hot the clutch fan should be tight but not seized or easy to turn. At highway speeds the fan is along for the ride, the air flow does the cooling. I would lean towards an issue else where. I would start with the water pump since your temp gauge changes, is it mechanical or stock electric.
As for the alternator i have never had one that went bad change other gauges readings other than the voltage reading. Do you have an amp gauge or volt gauge....
Last edited by 7T3stinger; Oct 8, 2022 at 05:13 PM.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Just started car. Headlights are fine. The only gauge that change the other day was the temp when the car started to squeal.
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Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
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Certainly the first thing I would check is belt tension. After that, yes start checking bearings.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
maybe. I’m going to start with belt and move on from there. Cheapest and easiest first fix besides a thermostat which I will also do. Can’t hurt.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.