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INTERSTATE MCBEE

INTERSTATE-MCBEE M-4089650 UPPER ENGINE GASKET SET .010 OVERSIZE 89–98 5.9L CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-4089650
MPN:
M-4089650
Shipping:
Calculated at Checkout
$322.37
724-785-4022

Description

Interstate-McBee M-4089650 Upper Engine Gasket Set – .010 Oversize – 1989–1998 5.9L Cummins 12-Valve

OEM-style upper engine gasket set with a +.010 in (0.25 mm) head gasket for resurfaced 5.9L 12-valve Cummins engines (Dodge Ram 2500/3500, 1989–1998). Built by Interstate-McBee for precise sealing, durability, and factory-equivalent fit.

  • Oversize thickness: Includes +.010 in (0.25 mm) head gasket for decks/heads that have been machined.
  • OEM-equivalent fit: Direct replacement for Cummins 4089650 upper set.
  • Complete top-end reseal: Intake, exhaust, valve cover, turbo and ancillary seals typically included.
  • Aftermarket value: Interstate-McBee quality at significant savings over OEM.

Specifications

Manufacturer Interstate-McBee
Part Number M-4089650
OEM Reference Cummins 4089650 (upper engine gasket set)
Head Gasket Thickness +.010 in (0.25 mm) oversize
Engine 5.9L Cummins 12-Valve (6BT) B-Series
Typical Contents Head gasket (+.010), intake gasket, exhaust manifold gaskets, grid heater gaskets, turbo drain, injector copper seals, valve cover gasket, small seals; some kits include valve stem seals (see notes)
Warranty Interstate-McBee new engine parts typically 24 months from installation

Vehicle Fitment

Always verify by engine serial number (ESN).

  • Dodge Ram 2500/3500 – 5.9L Cummins 12V
    • 1989–1993 12-Valve (VE pump)
    • 1994–1998 12-Valve (P-pump)

Included Components (typical)

  • Head gasket, +.010 in (0.25 mm)
  • Intake & exhaust manifold gaskets
  • Grid-heater gaskets; turbo to manifold/drain gaskets
  • Injector copper seals & miscellaneous top-end seals
  • Valve cover gasket
  • Note: Some kits include new-style “top-hat” valve stem seals; certain applications may require machine work to use them. See FAQ.

Install Notes

  • Confirm required head-gasket thickness (+.010) based on measured piston protrusion/decking.
  • Clean all mating surfaces thoroughly; follow Cummins service manual torque sequence/specs.
  • Use sealants only where OEM procedure specifies.

Cross-References

Related Cummins part numbers by thickness: 4089649 (standard), 4089650 (+.010), 4089651 (+.020).

Why Buy From CPP Diesel

  • ESN-verified fitment support for B-Series engines
  • Fast shipping & hassle-free returns
  • Curated 12-valve rebuild components to complete your job

FAQ

What does “+.010 oversize” mean?
The head gasket is thicker by +.010 in (0.25 mm) to compensate for material removed during decking or resurfacing. It is not a cylinder bore oversize.
Will this fit all 1989–1998 5.9L 12-valve trucks?
Yes, this upper set targets 1989–1998 Dodge Ram 2500/3500 5.9L 12-valve applications. Verify via ESN and confirm your required head-gasket thickness before ordering.
Are valve stem seals included?
Some kits include new-style “top-hat” valve stem seals. Certain 12-valve heads may require machining to use them; many builders opt for the correct old-style seals instead. Check your head style before installation.
How does this compare to the OEM Cummins kit?
Interstate-McBee builds to OEM-equivalent specs and is a cost-effective alternative. If you need OEM-boxed parts, Cummins 4089649 (STD), 4089650 (+.010), and 4089651 (+.020) are the factory options.
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