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  • CUMMINS 3927305 OEM THERMOSTAT HOUSING COVER GASKET – 5.9L 12V (1994–1998)
  • CUMMINS 3927305 OEM THERMOSTAT HOUSING COVER GASKET – 5.9L 12V (1994–1998)

    • CUMMINS 3927305 OEM THERMOSTAT HOUSING COVER GASKET – 5.9L 12V (1994–1998)

    $14.37
    (1 review) Write a Review
    SKU:
    CUM3927305
    Width:
    2.50 (in)
    Height:
    0.60 (in)
    Depth:
    2.50 (in)
    Shipping:
    Calculated at Checkout
    YEAR:
    1989,1990,1991,1992,1993,1994,1995,1996,1997,1998
    MAKE:
    DODGE CUMMINS
    ENGINE:
    5.9L
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    Product Description

    Cummins 3927305 — Genuine Thermostat Housing Cover Gasket

    MPN: 3927305  |  Also Known As: thermostat cover gasket, thermostat housing gasket

    Stop coolant seepage at the thermostat cover on your second-gen. This genuine Cummins housing cover gasket is a direct-fit seal for 1994–1998 Ram 2500/3500 5.9L 12-valve (P7100). Built to OE specs for a reliable, leak-free seal.

    Features & Benefits

    • OE sealing geometry for a precise fit and long service life.
    • Direct-fit replacement — no trimming or sealant blobs required.
    • Prevents coolant leaks that can cause temp fluctuations and mess.
    • Genuine Cummins materials for consistent compression and recovery.

    Verified Fitment (Automotive)

    Year RangeEngineChassis
    1994–1998 5.9L 12V (P7100) Ram 2500/3500

    Industrial/Off-Highway: Listed by Cummins for Euro II / B-Series 5.9L usage — verify by ESN on non-automotive engines.

    Compatibility Notes:

    • Pairs with the thermostat O-ring 3925466 and 180° thermostats 3934373 or 3928499 on ’94–’98 12-valve trucks.
    • For 1989–1993 first-gen trucks, see the earlier thermostat/gasket set (e.g., 5292738 + 3923331).

    Specifications

    • Type: Thermostat housing cover gasket (upper cover to housing)
    • OE Part Number: 3927305
    • Quantity Required: 1 per service

    Often Paired With

    • Thermostat O-ring: 3925466 (’94–’98)
    • Thermostat (180°): 3934373 or 3928499 (’94–’98)
    • Fresh coolant: refill/bleed after service

    What’s In The Box

    • (1) Genuine Cummins Thermostat Housing Cover Gasket (3927305)

    Installation Tips

    • Drain coolant below the thermostat level; clean mating surfaces thoroughly.
    • Use new 3925466 O-ring with the thermostat; place 3927305 between the cover and housing.
    • Torque fasteners evenly to spec; refill coolant and bleed air. Recheck for leaks after warm-up.

    FAQ

    WILL THIS FIT MY 1994–1998 5.9L 12-VALVE?

    Yes—3927305 is the OE thermostat housing cover gasket for ’94–’98 Ram 2500/3500 5.9L 12-valve.

    WHAT OTHER SEALS DO I NEED?

    Use 3925466 (thermostat O-ring). Many owners also replace the 180° thermostat (3934373 or 3928499) during service.

    DOES THIS FIT FIRST-GEN (1989–1993) OR 24-VALVE/COMMON-RAIL?

    First-gen and later engines use different gaskets/thermostats. Check by VIN/ESN for the correct part numbers.

    IS THIS A GENUINE CUMMINS PART?

    Yes—OE Cummins 3927305.

    WHY REPLACE THIS WHEN DOING A THERMOSTAT?

    Old paper/composite gaskets crush and harden; reusing them risks leaks. A fresh OE gasket ensures a reliable seal.

    Product Videos

    Custom Field

    YEAR 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998
    MAKE DODGE CUMMINS
    ENGINE 5.9L

    Product Reviews

    Write a Review

    1 Review Hide Reviews Show Reviews

    • 5
      Exactly what I needed

      Posted by Josh on Oct 5th 2021

      Exactly what I needed, I imagine that they’re different set ups as cummins are in so many different vehicles, but I was having trouble finding the correct thermostat gasket set for tomorrow 95 Dodge 2500. This set is perfect for a 12 valve Cummins with the engine lift hook between the block and the thermostat housing

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