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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum


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Old 10-21-2019, 03:00 AM   #41 (permalink)
spwjph
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I pulled that rod and piston passenger side #3 cylinder and found that the Piston is cracked symmetrical across the wrist pin boss on both sides up at an angle to the oil control ring groove completely across the one side of the Piston.

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95 burb L65 F,320K miles,original engine,DE exhaust,flo-proXover,homebrew FTB,HX40II 14cm turbone,Buddy's six banger, 311 HO injectors/5521ip, 3.42 RP, Gray PMD, Bosch Duraterms, 265/75/16 Cooper ST Maxx

95 C3500HD flatbed, Navistar block @ 100K, Flo-ProXover, FTB, Buddy 6 banger tune, 311 HO Injectors/5521ip, 4.63 RP,225/70/19.5....in process,HX40 18cm W/4" DP-5"back exhaust, Fass150 LP got all the stuff just need to "getter done"


Both have GMT800 cooling system upgrades...single stat, 9 blade composite fan, Hayden HD fan clutches...

Last edited by spwjph; 10-21-2019 at 03:02 AM.
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Old 10-21-2019, 10:03 AM   #42 (permalink)
OkDually
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have you Inspected the crankshaft and mains for cracks?

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Old 10-21-2019, 10:08 AM   #43 (permalink)
spwjph
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Yes, the crank and all the main webs are crack free. I haven't had that rod checked for twist or if it's bent. I am thinking I should, although it is look as if the Piston took the brunt of the damages.
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95 burb L65 F,320K miles,original engine,DE exhaust,flo-proXover,homebrew FTB,HX40II 14cm turbone,Buddy's six banger, 311 HO injectors/5521ip, 3.42 RP, Gray PMD, Bosch Duraterms, 265/75/16 Cooper ST Maxx

95 C3500HD flatbed, Navistar block @ 100K, Flo-ProXover, FTB, Buddy 6 banger tune, 311 HO Injectors/5521ip, 4.63 RP,225/70/19.5....in process,HX40 18cm W/4" DP-5"back exhaust, Fass150 LP got all the stuff just need to "getter done"


Both have GMT800 cooling system upgrades...single stat, 9 blade composite fan, Hayden HD fan clutches...
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Old 10-21-2019, 10:20 AM   #44 (permalink)
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Quote:
Originally Posted by spwjph View Post
Yes, the crank and all the main webs are crack free. I haven't had that rod checked for twist or if it's bent. I am thinking I should, although it is look as if the Piston took the brunt of the damages.
I would check that also.
It could be a manufacturing defect that reared its ugly head or an actual problem within the motor
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1996 K3500 6.5L,( "F" Eng #141 cast block) 5 speed manual, crewcab, dually longbed: 208,000mi.
Diamond Eye 4" Turbo Back Exhaust w/2.5" Flo-Pro Crossover
AirDog II DF165 w/ tank sock delete - XDP
TD-Max boost controller - Kennedy Diesel
OPS extension hose - Leroy Diesel
Glow Plug Harness- PT Wiring Solutions
Glowshift Maxtow EGT,Boost, Fuel gauges
Boost & Fuel Pressure Bolts - Leroy Diesel
2/0 Battery Cable Upgrade - PT Wiring Solutions
PMD w/#9 resistor and Re-Location Kit, mounted to bumper - Leroy Diesel
GM-5 Turbocharger
4.10 gear ratio
OptiLube Winter Formula


Proud member #1039 of The 3500 Dually Club

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Old 11-08-2019, 01:54 PM   #45 (permalink)
spwjph
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Installed all new rod bearings while in there and deglazed that cylinder new rings and piston going in.
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95 burb L65 F,320K miles,original engine,DE exhaust,flo-proXover,homebrew FTB,HX40II 14cm turbone,Buddy's six banger, 311 HO injectors/5521ip, 3.42 RP, Gray PMD, Bosch Duraterms, 265/75/16 Cooper ST Maxx

95 C3500HD flatbed, Navistar block @ 100K, Flo-ProXover, FTB, Buddy 6 banger tune, 311 HO Injectors/5521ip, 4.63 RP,225/70/19.5....in process,HX40 18cm W/4" DP-5"back exhaust, Fass150 LP got all the stuff just need to "getter done"


Both have GMT800 cooling system upgrades...single stat, 9 blade composite fan, Hayden HD fan clutches...
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Old 11-14-2019, 02:09 AM   #46 (permalink)
spwjph
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Rebuilt head back on and torqued down.
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95 burb L65 F,320K miles,original engine,DE exhaust,flo-proXover,homebrew FTB,HX40II 14cm turbone,Buddy's six banger, 311 HO injectors/5521ip, 3.42 RP, Gray PMD, Bosch Duraterms, 265/75/16 Cooper ST Maxx

95 C3500HD flatbed, Navistar block @ 100K, Flo-ProXover, FTB, Buddy 6 banger tune, 311 HO Injectors/5521ip, 4.63 RP,225/70/19.5....in process,HX40 18cm W/4" DP-5"back exhaust, Fass150 LP got all the stuff just need to "getter done"


Both have GMT800 cooling system upgrades...single stat, 9 blade composite fan, Hayden HD fan clutches...
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