I was passing someone on the way home yesterday, I was in 2nd gear, fairly high rpm and I hear a sound that is best described as a vibrating squeal. I go home and shut it off. I start the car up this morning, runs fine, no odd sounds until I give it some throttle, then I can hear the odd knock as I flutter the throttle. The knock is not always there, only when I give it some gas. As I increase the throttle, the knock turns into that vibrating squeal, hammering may better describe the vibrating, this noise is not all the time, just at a higher rpm. At idle the car sounds normal. I dont know what the problem is, but would appreciate the help. Thanks.

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Excuse me, does this smell like chloroform to you?

Just a guess, but the noise sounds like spun rod bearing.

Just another guess for a spun rod bearing....

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Yeah....Im the one who destroyed this rare, vintage automobile.....

What model and year are we working on?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

The car is 72 dart, 225 engine, 904 trans. Could it be a loose torque converter? I dont see or feel a vibration. Motor needs to be pulled, huh?

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Excuse me, does this smell like chloroform to you?

I would check the converter bolts before I pulled the motor. It's happened to me twice now.

I've seen where the converter bolts were still connected to the lugs, but the welds holding the lugs to the converter had broken, so look closely....

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Long shot, but pull the fan belt. Could be a water pump or alternator.

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Official Cookie and Mater Tormentor.

I did pull the fan belt off. I was hoping that would be the problem. Nay.

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Excuse me, does this smell like chloroform to you?

I have had flex plate bolts back out three times. Once on the 340 in my Barracuda and twice in my race car. Solid motor mounts tend to cause vibrations. All three times it sounded like a rod knock. I have not heard no squill or shrill noise. I doubt that the flexplate tabs have broke on the converter I tore a flex plate in two and the tabs and bolts were fine on the converter. My flex plate looked like a 8 inch circular saw blade. Thanks Ron Parker







Jaggers Fabircation Slanted Attitude Dart

Thanks for feedback, I will check the flexplate/torque converter. If it is a spun rod bearing, whats the best way to go? Replace all rod bearings? The whole bottom end?

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Excuse me, does this smell like chloroform to you?

Total rebuild would be my answer. Thanks Ron Parker












Jaggers Fabrication Slanted Attitude Dart

If it is sqealing you have already burnt the crank. If it is a low mileage short block I would roll the dice and put a crank kit in it. If it has miles, total rebuild is the way to go.

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Official Cookie and Mater Tormentor.

Well it is not a rod bearing, I pulled all of them. They all look brand new. I suppose its time to pull the main bearings? What is the chance they would spin?

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Excuse me, does this smell like chloroform to you?

50-50. Either it did or it didn't.

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Official Cookie and Mater Tormentor.