Cummins QSB6.7 / 6ISDe / 6D107 Cylinder Head

OE 3977221

Aftermarket replacement for B2B importers, distributors, wholesalers and private-label programs.

Product category: Cylinder Heads
Brand application: Cummins
Engine / model: QSB6.7 / 6ISDe / 6D107
OE references: 3977221
Application: Cummins 6D107 QSB6.7

Representative image of this product series — the actual part may differ. Confirm final specification and application before ordering.

PRODUCT OVERVIEW

ABOUT THIS CYLINDER HEAD.

The TRUPA Cummins QSB6.7 / 6ISDe / 6D107 Cylinder Head is an aftermarket replacement cylinder head referenced to OE number 3977221. It is listed for Cummins 6D107 QSB6.7 (QSB6.7 / 6ISDe / 6D107). TRUPA supplies it to importers, distributors, wholesalers and private-label programs, with China export supply and partner-warehouse support in the USA and Brazil for eligible orders.

WHAT IT DOES

The cylinder head closes the top of the cylinders and carries the valves, ports, injector bores and coolant passages. Heavy-duty diesel heads are usually cast iron and are replaced as a bare or fully assembled unit.

APPLICATION & FITMENT

Listed for Cummins 6D107 QSB6.7. More parts for Cummins. Engine family: Cummins QSB6.7 / 6ISDe / 6D107.

OE & INTERCHANGE NUMBERS

3977221

BEFORE YOU ORDER

OE / casting number and engine model
Bare or loaded (with valves, springs and so on)
Single-cylinder or multi-cylinder head for the engine
Emissions or fuel-system variant, which changes injector bores and ports

COMMON REPLACEMENT SIGNS

Cracks between valve seats or at injector bores
Coolant loss or combustion gas in the coolant
Warped deck causing head-gasket failure
Burnt valves or worn seats and guides

QUALITY CHECKS

Heads should be pressure-tested for cracks, with deck flatness, valve-seat geometry and bore dimensions checked against specification. How TRUPA approaches quality control.

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