| Engine rebuild has begun [message #351396] |
Thu, 16 January 2020 07:51  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma:
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Senior Member |
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Many folks across NC, FL, and TN have listened to my now 8000 mile, PO rebuild by a non GMC shop to diagnose the knock that was mainly evident on hot restart. With no definite answers from some of the best mechanics, it is coming out to check the innards before a catastrophic or inconvenient failure. The warm week here has been favorable (though wet) to start. A local GMC'er that already had a trolley built is helping me, and I'm hoping to have the last few accessories off today to swing the 455 through the kitchen and cherry pick it out the door. I'm taking video and pics and will probably do some across Youtube, Facebook and the GMC photo site.
The first problem that I have found is a significant crack on the passenger side stock exhaust manifold. Anyone have a spare?
Stay tuned! I'll add a more in-depth post to this thread about the "why" of this rebuild...hoping for an answer to the main concern of the knock! Care to claim a cause this early in the process? Is it A) main bearing B) thrust bearing C) thrust plate D) broken piston sleeve E) other?
Tyler
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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