The carb is the correct Rochester 4GC. I believe the crank and rods are the originals. Reportedly they did some "shaving" on the rods, so they are suspect. The pistons are new, but they are being cleaned and will be weighed. The valves appear to be new but I don't know about the other valve train pieces. I doubt any of those parts could cause a vibration. As I said before, the trans, flex plate, pulleys and balancer were removed and it was test run and still had the vibration.
When I talk to him again, I'll suggest the balancing. He should take those parts to another shop for that.
He said he adjusted the mixture screws using a vacuum gauge but I forgot to ask him what the readings were. There might be a leak which would cause the lean condition. I'll ask him if he has the correct PCV system hooked up. I want to know those things before making any changes to the carb.
Verne
Last edited by Verne_Frantz; 12-19-2020 at 02:35 AM.
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12-19-2020, 02:33 AM
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