Front Cover Gasket Compatible With Cummins Qsc8.3 2002-2015 Qsc 8.3 8.3L 6-Cyl Diesel Power Unit

CASE EXCAVATORS:
• Case CX330/CX350 QSC 8.3L Diesel (2004-2012)

HYUNDAI EXCAVATORS:
• Hyundai R290LC-7/R305LC-7 QSC 8.3L Diesel (2002-2010)

CUMMINS POWER UNITS:
• Cummins QSC8.3 QSC 8.3L 6-cyl Diesel (2002-2015)


IMPORTANT:
This is the front gear housing gasket for the Cummins QSC 8.3L engine — it seals the timing gear cover to the block. Supersedes earlier Cummins part number 3918673. If your parts book shows 3918673, this is the correct updated replacement. Do NOT confuse with the rear gear housing gasket, which is a different part number and shape.

Failure symptoms: oil weeping from the front of the engine near the timing cover, oil dripping onto the serpentine belt or harmonic balancer area. When replacing this gasket, inspect the front crankshaft seal and replace if hardened or leaking — the labor overlap makes this the ideal time. Clean all old gasket material from both mating surfaces thoroughly before installation. The QSC 8.3 shares the same basic block architecture with the QSL9 but uses different gaskets — do not interchange.

⚠️ Confirm QSC 8.3 engine — not QSL9 or ISC — and verify engine serial number before ordering.