Dibbons
Well-Known Member
- Local time
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- Joined
- Nov 29, 2014
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- 4,732
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- Location
- La Paz, B.C.S., Mexico
The "complete" core 340 I purchased had a forged crank installed without the drilled 1/2 and 7/8 rod journals. Don't know if it was from a 273 or 318 or what. I have been hesitant to put it back together with new rings and bearings because I don't know the history of the rotating assembly balance. It also had a hodgepodge of parts: front sump oil pan, two passenger side exhaust manifolds casting #3418623, .509 camshaft, Carter AVS from a non high-performance big block, etc. The installed bearings were dated 1982.
I previously decided to rebalance the rotating assembly, but I don't know of anyone in the area that is qualified for such an endeavor, and San Diego is 1000 miles away. So yesterday while I was doing some yard work, I decided to just put the motor back together anyway (hone the .040 over cylinders, new rings, bearings, valve job, new camshaft, gaskets) and hope for the best. I hope it doesn't shake itself to death. Best scenario is the previous owner had sense enough to re-balance it in the first place.
Foto is not mine, but I found it on FABO to demonstrate difference in crankshafts I am talking about.
I previously decided to rebalance the rotating assembly, but I don't know of anyone in the area that is qualified for such an endeavor, and San Diego is 1000 miles away. So yesterday while I was doing some yard work, I decided to just put the motor back together anyway (hone the .040 over cylinders, new rings, bearings, valve job, new camshaft, gaskets) and hope for the best. I hope it doesn't shake itself to death. Best scenario is the previous owner had sense enough to re-balance it in the first place.
Foto is not mine, but I found it on FABO to demonstrate difference in crankshafts I am talking about.