Quote:
Originally Posted by Va68goat
mgarblik,
Man...we have checked for anything that could be causing that noise. We are still going to check some again BUT...how can anyone explain the damage to the distributor bushing, the damaged bearings and damaged piston rings, the block needing a light honing and the crank needing polishing? We've pulled the torque converter back at least 4 different occassions and that wasn't the problem. I was worried about the flex plate because thats the only thing that wasn't new. I bought a new one and sent it to Paul. He balanced it and once again...It wasn't the problem. I was told that it would be difficult to hear this noise from the booth of a dyno room. Thank you for the suggestions. We will recheck everything that could be vibrating, hitting..etc.
torqhead,
All of that makes sense to me but if this motor was just on a dyno a month ago, how could timing be in play? We didn't adjust the timing or the carb. We will definately get the right stud in the carb. Thanks for taking the time for the ideas..now that does actually help!
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I think it's Joe, and I'm only trying to add advice to hopefully help. I know you're a novice and hope this will help.
The damage to bearings, crank and also what caused the cylinders to have some light honing work is understandable. It is highly due to the bearing issue on the distributor as well as possibly pre-ignition caused by a spark issue from the distributor and/or setup. I know that covers a lot of bases but damage can occur quickly if you got detonation issues. Detonation will kill any motor, and I mean any motor quickly, it's just plain hard on bearings and if you get micro-millimeter debris in the oil it damages and scuffs crank and cylinders. Debris such as fine metal from that bad bearing gets in the oil and the moving parts rub this oil between them and causes damage. I would assume Paul/Jeff and these guys saw the damage and hence why they decided they needed to make it new again which is good.
I understand you are saying everything is the same, but we are asking or suggesting some things could be different as we don't know all the details. Some questions, and the list can go on...
Did the motor ship with the distributor in and not touched from Arizona to you. Were the plug wires all installed, etc. Was none of this touched when you took the motor off the crate or whatever to hook it to the lift and then install it in the car, distributor/spark plug wiring/everything? Was the carburetor removed and reinstalled since it ran on the dyno? There's a lot of little items that could be involved here and why I'm asking as I assumed (maybe incorrectly) that those things had to be installed or potentially changed (unplugged and reconnected) between the last time it was run and now when it's in the car.
The way that motor jerks around, as I pointed out earlier, tells me something is wrong and I would tend to believe it's not mechanical. None of us like to hear or witness the challenges you're going through. Something definitely seems amiss here and I hope as I said previously your new friend from the forum that's going to come help
will find the cause. I'm sure it'll be a relief and shocker all at the same time.