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92 Chevy Truck Knocking


gbutler's Avatar
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05-25-04, 05:34 PM   #1  
gbutler
92 Chevy Truck Knocking

I have a 92 chevy truck with 350 engine. Recently it started making a knocking sound only when under load such as accelerating or going up a hill. It also started idling rough. There is no knocking noise while not in gear. A local transmission shop thought it was a cracked flywheel but upon removal told me that it was the torque converter. I did the torque converter myself because they wanted $300 for the converter alone not including labor.

Anyway, the truck still makes the exact same noise with new torque converter.

The noise is loud enough to be heard from a good distance away. I'm no expert but it seems too loud to be carbon deposits or something like that. I do notice that the knock sensor seems to be cracked. Could that cause such a loud knock or a rough idle?

 
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Desi501's Avatar
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05-25-04, 05:54 PM   #2  
Posted By: gbutler I do notice that the knock sensor seems to be cracked. Could that cause such a loud knock or a rough idle?
No, but the harmonic balancer could be broken and slipping.

 
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05-26-04, 04:43 PM   #3  
That sounds like a rod knock to me go to a garage and let someone who knows listen to it to make sure.

 
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