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Let's Play A Game @ Engine Troubleshooting

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Old Feb 28, 2024 | 03:11 PM
  #1  
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Default Let's Play A Game @ Engine Troubleshooting

Since everyone loves engine builds:

Can you guess what made this engine stop after only 10 MILES on a fresh rebuild?

Without watching the video?

It is OK to guess, but no "answer spoilers" until a few have had a chance to play!

I'll give you some clues as to what "Jim" found on autopsy:
  • Seized engine
  • Bent pushrod
  • Basically good machine work
  • One main bearing half shell @ .020" over others @ .030"
  • One rod cap backwards
  • No shims on main caps
  • Valve guide clearances in spec, but on tight side
  • Piston clearance in spec
  • New pistons
  • New valves
  • New valve guides
  • Umbrella valve seals
  • Valve seats recessed
  • No hardened valve seats
  • Valves stems given a cross hatch pattern
  • A couple of blue exhaust valves
  • One big missing clue ???
Jim's Machine Shop autopsies this very well and critiques the other machine shop's work.



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Old Feb 28, 2024 | 03:46 PM
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I saw this the other day but won't say anything. pretty good channel. another good channel i just found is Precision Transmission. the guy explains everything and seems to really know his stuff.

Pat
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Old Feb 28, 2024 | 07:29 PM
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Precision Transmission seem like a great business.
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Old Feb 28, 2024 | 10:11 PM
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I already saw the episode... interesting how there was a convo here a few days ago warning against what killed this engine.
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Old Feb 29, 2024 | 10:20 AM
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Great to see that there are still some engine rebuilders that take pride in their work. I wish there were more of them. Jerry
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Old Mar 1, 2024 | 08:27 PM
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Yes unfortunately I believe there are fewer of the good ones everyday.

My best friend was a great engine builder / machinist. He thought like this. Find the real problem.

I have tried to talk to a couple of other machine shops since he passed.....I was not impressed.
I even worked in a friend's shop for a bit and saw some of the shortcuts they and their suppliers take from the inside...... grrr...... it's a sad state of affairs.
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Old Mar 1, 2024 | 10:26 PM
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In for watching the videos later.
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Old Mar 2, 2024 | 11:20 AM
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I've been subscribed to JAMSI for a while now, they put out some great vids.....that engine was a mess.




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