The higher the compression numbers, the better.
If you see 350 and below your engine is pretty tired....
First and foremost inspect the bottom end mains and webs for any cracks, condition of the crank, etc.
Brake cleaner can help expose the smallest cracks.
If the block is good then work on upgrades.
ARP studs and gaskets, rocker retainer upgrade since you in there, New timing chain,water pump, Harmonic Balancer and Pulley, etc..
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
4.10 gear ratio
OptiLube Winter Formula
Proud member #1039 of The 3500 Dually Club
Last edited by OkDually; 02-05-2020 at 04:41 PM.