Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

6.5 injection pump ?

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  #11  
Old 04-03-2013 | 03:21 PM
tonkatruckon44s's Avatar
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From: La Porte IN
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GooD Thing I HaVe A Second Set OfHeads Then. I Just Hope I Didnt Do Anymore Damage.
 
  #12  
Old 04-05-2013 | 07:55 PM
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well i got the heads off today and i didnt see any of the rocker arm retainers broken so when i tore the drivers side off i started investigating and noticed slag on the injection port of cyl 3 and the hole was a little warped took a look at that cylinder and sure enough the piston was melted now time for a new piston at the least if not a sleeve.
 
  #13  
Old 04-05-2013 | 08:14 PM
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That suck's !
 
  #14  
Old 04-05-2013 | 08:20 PM
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yeah the only nice part is my buddy has a 6.5 block laying around that i can snag a piston from
 
  #15  
Old 04-10-2013 | 05:19 PM
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Does Anyone Have Some Ideas Why The Piston Would Have Melted... What Caused It To Heat Up So Much.
 
  #16  
Old 04-10-2013 | 05:40 PM
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Injectors that pee out rather than spray cause extreme hot spots that will melt pistons.

That is why injectors should be replaced/rebuilt every 100,000 miles-they should also be pop tested to confirm/adjust pop pressure before installation even when new,they should all be within 10% of each other or closer.

ONLY Bosch,Delphi or Stanadyne nozzles should be used.
 

Last edited by racer55; 04-10-2013 at 05:42 PM.
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