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Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 01-27-2020, 10:35 PM   #1 (permalink)
Ermanno
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Noise

Started hearing a funny grinding/clunking kind of noise that sounds like its coming from centre in front of console near firewall. Doesnít change with fan speed or acceleration. Any ideas? Itís driving me nuts.

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Old 01-27-2020, 10:59 PM   #2 (permalink)
OkDually
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I would Inspect your flexplate

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Old 01-28-2020, 10:17 PM   #3 (permalink)
Ermanno
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Ended up being a bad bearing in Alternator.
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Old 01-28-2020, 10:44 PM   #4 (permalink)
OkDually
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Glad you found the issue.

Thanks for giving us an update

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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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