Cummins QSB6.7 ISB6.7 Komatsu 6D107 Engine Cylinder Liner 3904167

3904167 Cylinder Liner Sleeve for Cummins 4BT / 6BT Engine

The industrial grade 3904167 cylinder liner is a specialized high-precision dry salvage sleeve engineered to restore worn or damaged engine blocks to standard factory configuration. Designed specifically for the legendary Cummins B-series engine family, this component allows rebuild workshops to salvage parent-bore cylinder blocks that have suffered localized scoring, avoiding full block replacement costs.

Technical Specifications & Structural Dimensions

Cross-Hatch Honing Physics and Piston Ring Seating

Cummins 6BT engines running in heavy agricultural tractors or stationary industrial power generators often suffer from bore glazing during extended low-load idling. This smooth finish prevents engine oil from adhering to the cylinder walls, causing the piston rings to skate and blow combustion gas into the crankcase. Our premium 3904167 salvage sleeves are pre-machined with a specific cross-hatch angle pattern. This plateau-honed finish acts as a microscopic reservoir network that retains a uniform lubrication film, ensuring rapid piston ring break-in and resolving chronic engine oil consumption.

Preventing Thermal Insulation Air Gaps in Parent Bore Machining

Because the Cummins 5.9L block does not feature removable wet liners from the factory, boring out the damaged parent block cylinder hole to accept the dry 3904167 repair sleeve requires absolute geometric precision. The interference press-fit clearance between the block bore and the sleeve outer diameter must be held to exact engineering specifications. If the block hole is machined too large, microscopic air gaps will form behind the installed liner wall. These air gaps act as highly disruptive thermal insulators, blocking engine heat from escaping into the water jackets, which can cause localized hot-spots and premature piston crown seizure under maximum torque load.

Secure a Verified Global Industrial Quote Within 24 Hours

To ensure a perfect mechanical match and minimize fleet downtime, please submit your complete Cummins Engine Serial Number (ESN) or equipment model plates to our support team. Our heavy machinery parts specialists will cross-check the official factory documentation database to verify that the 3904167 dry sleeve core perfectly matches your engine overhaul project constraints.

FAQ

Is the 3904167 dry liner sleeve supplied as a semi-finished or fully-finished part?

The 3904167 sleeve is typically supplied as a semi-finished repair sleeve. Because dry-type liners suffer severe structural squeeze and compression during mechanical press-fitting into the solid parent-bore block, the inner diameter must be honed to standard factory specifications post-installation to establish the final correct running clearance for the standard piston skirts.

Can this repair sleeve be used for all six cylinders on a Cummins 6BT block?

Yes. Rebuilders can use individual 3904167 sleeves to fix a single damaged cylinder hole, or install a complete set of six sleeves across the entire engine block block to completely renew a heavily worn block back to standard factory performance dimensions.