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  • CUMMINS 3969698 OEM P7100 INJECTION PUMP–TO–TIMING CASE O-RING SEAL – 5.9L 12-VALVE (1994–1998)
  • CUMMINS 3969698 OEM P7100 INJECTION PUMP–TO–TIMING CASE O-RING SEAL – 5.9L 12-VALVE (1994–1998)

    • CUMMINS 3969698 OEM P7100 INJECTION PUMP–TO–TIMING CASE O-RING SEAL – 5.9L 12-VALVE (1994–1998)

    $22.53
    (1 review) Write a Review
    SKU:
    CUM3969698
    Width:
    4.13 (in)
    Height:
    0.10 (in)
    Depth:
    4.13 (in)
    Shipping:
    Calculated at Checkout
    Vehicle Year:
    1994,1996,1997,1998
    Vehicle Make:
    DODGE
    Vehicle Model:
    5.9L
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    Product Description

    Cummins 3969698 — Genuine P7100 Injection Pump–to–Timing Case O-Ring Seal

    MPN: 3969698  |  Also Known As: P7100 pump mounting gasket, timing case O-ring  |  Common Cross-Refs (ID): Cummins 3924605 (family interchange)

    Stop fuel seepage at the pump flange. The genuine Cummins 3969698 O-ring seals the joint between the Bosch P7100 injection pump and the gear housing (timing case) on 1994–1998 Ram 2500/3500 5.9L 12-valve trucks. OE elastomer, OE profile—exactly what you need any time the P-pump is removed or reinstalled.

    Features & Benefits

    • OE sealing profile for the P7100 pump flange to prevent leaks and air intrusion.
    • Direct-fit replacement—no trimming or sealant globbing required.
    • Maintains case vacuum/pressure integrity for stable fueling and clean starts.
    • Genuine Cummins part for consistent material quality and longevity.

    Verified Fitment (Automotive)

    Year RangeEngineInjection PumpChassis
    1994–1998 5.9L 12-Valve Bosch P7100 Ram 2500 / Ram 3500

    Industrial/Off-Highway: Cummins catalogs 3969698 as an O-Ring Seal used primarily on Euro II 5.9-liter B-engines. If ordering for equipment or non-automotive engines, verify by ESN.

    Specifications

    • Type: O-ring (pump mounting / timing case seal)
    • OE Part Number: 3969698
    • Mates: Bosch P7100 pump flange to gear housing
    • Material: OE elastomer (round cross-section)
    • Quantity Required: 1 per pump install

    Often Paired With

    • P7100 rear support bracket: Cummins 4003580 (brace)
    • Block-side support: Cummins 3928898
    • P7100 mounting hardware/seal kit (studs, nuts, ancillary seals)
    • Front cover/timing case gasket set (if the housing is serviced)

    What’s In The Box

    • (1) Genuine Cummins P7100 Pump–to–Timing Case O-Ring Seal (3969698)

    Installation Tips

    • Mark pump timing before removal; avoid rotating the pump shaft relative to the gear.
    • Clean the groove and mating face; lightly oil the new O-ring. Do not use RTV on the sealing land.
    • Seat the pump squarely to prevent pinching; torque fasteners to spec and re-verify timing marks.
    • Prime the fuel system and check for leaks after first start.

    FAQ

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

    Yes—3969698 is the OE P7100 pump mounting O-ring for 1994–1998 Dodge/Ram 5.9L 12-valve applications.

    DOES THIS FIT 1998.5–2002 24-VALVE (VP44) TRUCKS?

    No—VP44 systems use different seals and hardware. This O-ring is specific to the Bosch P7100.

    WHERE DOES THIS O-RING INSTALL?

    Between the P7100 pump mounting flange and the gear housing (timing case).

    ARE THERE ALTERNATE/LEGACY IDS?

    Many catalogs cross-list 3924605 (and related family numbers). Match by pump type and ESN when in doubt.

    SHOULD I REPLACE THIS ANY TIME THE PUMP IS REMOVED?

    Yes—always install a new OE O-ring to ensure a leak-free reassembly.

    Product Videos

    Custom Field

    Vehicle Year 1994,1996,1997,1998
    Vehicle Make DODGE
    Vehicle Model 5.9L

    Product Reviews

    Write a Review

    1 Review Hide Reviews Show Reviews

    • 5
      P7100 pump

      Posted by Brian Mcgiboney on Nov 25th 2024

      The seal is still leaking but I think it’s because I messed it up whenever I slid the p7100 pump back into the housing

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