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squeak in 413

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Old Aug 14, 2007 | 11:47 PM
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squeak in 413

I have a 413 chrysler motor in my 79 ford tow truck and latly i have noticed a high pitched squeaking niose coming from the motor. Id like to get some of your ideas on what it is because it realy sounds bad. I have allready taken off the belts to see if it was coming from the accessories but its not . any clues on what it could be would be greatly apriciated. Thanks
 
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Old Aug 15, 2007 | 11:21 AM
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It's your truck complaining about being Chrysler powered.

It could be a small vacuum leak under the carb somewhere. Is it a squeak or a whistle?
 
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Old Aug 15, 2007 | 03:39 PM
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It definatly sounds like metal on metal somewhere. and it has brand new oil in it
 
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Old Aug 15, 2007 | 09:41 PM
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It sounds like a rod bearing might be shot- they usually squeak when they get really bad.
Is the oil shiny?
Also could be a separated damper.
 
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Old Aug 15, 2007 | 10:30 PM
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Thats what i was afraid of the motor has over 200,000 miles on it. But i gess ill just run it till see goes.
 
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Old Aug 15, 2007 | 11:29 PM
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What is the frequency of the squeak? Crank speed or half? That would indicate mains vs. valve trouble. Can you use a stethoscope and isolate it?

Shame to risk loosing the block if you can tear it down before it blows.

Plus, they never blow just outside the shop on a little hill so you can roll it over to the shop door, now do they???
 
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Old Aug 16, 2007 | 09:01 AM
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My guess is a vacuum leak at an intake runner.
But I don't know what a 413 look like so it's just a guess.
 
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