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LS Rod Swap.... How To

Old 08-12-2008, 02:17 PM
  #101  
0.0 BAR
 
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Default Re: LS Rod Swap.... How To

.003 is excessive for an interference fit.. theres no need and you'd have to cook the ---- out of the rod/freeze the bearing to get it in there. the likelyhood of having the rod cool and grab the bushing half way in is very high. .0003" will probably hold adequately, but id say .001-.0015" is about your standard interference.

personally id rather press in a slug or predrilled core, then cut the bronze true in a pin bushing cutter (kinda rare but they hold the rod square by the big end and slide a boring bar with single point cutter through the pin end. engine shops have them.) and then hone to final fit. this way everything is square.

when you have a cocked pin bushing one side of the piston sits higher than the others so really tight head clearances might hit, the sharp edge of the ring face chaffes the cylinder wall, the piston wears all crooked. all kinds of bullshit that lead to an underperformer. nobody likes that.

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Old 04-13-2009, 01:27 AM
  #102  
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sweet!
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Old 07-18-2009, 05:20 PM
  #103  
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nice work
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Old 07-31-2009, 11:05 PM
  #104  
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Originally Posted by mike_belben View Post
.003 is excessive for an interference fit.. theres no need and you'd have to cook the ---- out of the rod/freeze the bearing to get it in there. the likelyhood of having the rod cool and grab the bushing half way in is very high. .0003" will probably hold adequately, but id say .001-.0015" is about your standard interference.

personally id rather press in a slug or predrilled core, then cut the bronze true in a pin bushing cutter (kinda rare but they hold the rod square by the big end and slide a boring bar with single point cutter through the pin end. engine shops have them.) and then hone to final fit. this way everything is square.

when you have a cocked pin bushing one side of the piston sits higher than the others so really tight head clearances might hit, the sharp edge of the ring face chaffes the cylinder wall, the piston wears all crooked. all kinds of bullshit that lead to an underperformer. nobody likes that.
re-fer to the original post, and skip all the bullshit
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Old 08-01-2009, 04:04 PM
  #105  
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sick
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Old 08-21-2009, 11:30 PM
  #106  
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nice build
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Old 10-08-2009, 09:37 AM
  #107  
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when you say,you cant reuse pistons that have been pressed in before,you mean you cant put them in another block or depress them and press them to other rods?
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Old 10-08-2009, 08:54 PM
  #108  
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good write up
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Old 10-08-2009, 11:22 PM
  #109  
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bump for you, excellent write up full of good info
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Old 01-04-2011, 10:07 PM
  #110  
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Quick update. After about 3 years DD, I'm still running on these rods w/ Vitaras
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