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enginedoctor

  • Karma: +7/-0
Here's what you do not wanna see when you teardown a new build
« on: February 14, 2012, 05:10:51 pm »
Crank snapped in half , cam in pieces too :thumbdown:
  • Boat #1: 1970 Horizon Cheby powered Jet
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GT Jets

  • Karma: +192/-0
Re: Here's what you do not wanna see when you teardown a new build
« Reply #1 on: February 14, 2012, 06:30:38 pm »
Crank snapped in half , cam in pieces too :thumbdown:

WTF?

Sounds like a major harmonics issue or major align hone miscalculation...

I have a SCAT crank from a 454 with a 13* twist in it from cylinder 8 to the snout...I thought it was a bad balancer.... :screwy:  This thing twisted hard enough to twist the pump shaft far enough that the splined adapter yoke had to be cut off with grinder... :screwy: :screwy:

By the way, she still ran pretty good, but could not get the tune dialed in for shit......She would pop, spit and fart and shook like a dog crapping razor blades.... :P

There is a chance that these pumps were not designed to go WFO into a sand bar.... ;D

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

obnoxious001

  • Karma: +4/-1
Re: Here's what you do not wanna see when you teardown a new build
« Reply #2 on: February 14, 2012, 06:36:15 pm »
Looks like a lack of oil if I am seeing that photo correctly,, destroyed the main bearings?  Block looks to be badly discolored from heat? 

I had a Merlin block repaired once that had 3 burned main saddles,, cost nearly as much as the block.
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enginedoctor

  • Karma: +7/-0
Re: Here's what you do not wanna see when you teardown a new build
« Reply #3 on: February 14, 2012, 07:15:10 pm »
This was a fresh build(NOT by me)  ... Customer only raced it once, one trip!  He said o/p was goin down. Problem here was found after my teardown. The mains housing was resized, but the caps walked back/forth & side to side in the block registers,  felt bad for the guy... Dimensionally too fk'ed up to measure anything... It's toast  :thumbdown:
  • Boat #1: 1970 Horizon Cheby powered Jet
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