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INTERSTATE MCBEE

INTERSTATE-MCBEE M-3802375 LOWER GASKET SET 89–98 3.9L 4BT CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-3802375
MPN:
M-3802375
Shipping:
Calculated at Checkout
$158.15
724-785-4022

Description

Interstate-McBee M-3802375 Lower Engine Gasket Set – 3.9L 4BT Cummins (89–98)

OEM-style lower engine gasket set engineered by Interstate-McBee for the 3.9L Cummins 4B/4BT. Ideal for resealing the bottom end during rebuilds and leak repairs. This aftermarket kit delivers a precise fit and durable sealing performance while saving cost versus OEM.

  • Complete lower kit: Covers oil pan, front/rear crank seals, gear housing, timing cover and more.
  • OEM-equivalent materials: Built to match Cummins specs for long-term reliability.
  • Aftermarket value: Interstate-McBee quality at a fraction of OEM list.
  • ESN-verified coverage: For 4B3.9 applications; verify by engine serial number when possible.

Specifications

Interstate-McBee P/N M-3802375
OEM Cross-Reference Cummins 3802375 (Lower Engine Gasket Set)
Engine Family Cummins 4B / 4BT / ISB / QSB (3.9L)
Typical Vehicle Fitment 3.9L 4BT conversions & applications (commonly referenced 1989–1998 range)
Broader Engine Coverage 4B3.9 applications approx. 1983–Apr 2003 (verify by ESN)

What’s Included (Representative BOM)

  • Oil pan gasket, gear/cover gaskets, timing housing gasket, cover plate gaskets
  • Front & rear crankshaft seal kits
  • Fuel/filter head gaskets, pushrod cover gasket, oil cooler core gasket
  • Multiple rectangular ring seals, O-rings, grommet seals, washers
  • Piston cooling nozzles and pads (where applicable)

Detailed BOM (by McBee P/N)

M-3905595, M-3906697, M-3906698, M-3908096, M-3912473, M-3913994, M-3938157, M-3914385, M-3939355, M-3915772, M-3915800, M-3916042, M-3938156, M-3920773, M-4947667, M-3928759 (x6), M-3283767, M-3938162, M-3939258, M-3929792, M-154916, M-3008400, M-3901020 (x4), M-4089342, M-3902425 (x2), M-3937214 (x4), M-4932124, M-3942915, M-3906696, M-3903475, M-3937111, M-3918673, CG65PAD (x2).

Vehicle / Engine Fitment

Always confirm by Engine Serial Number (ESN) for exact coverage.

  • Cummins 3.9L 4B / 4BT lower end reseal applications (commonly referenced: 1989–1998 4BT).
  • Industrial / Commercial / Ag / Genset: Broad 4B3.9 coverage (approx. 1983–Apr 2003 production).

Install Notes

  • Thoroughly clean mating surfaces and check flatness; remove all old gasket material.
  • Follow Cummins service manual for torque specs and sealant requirements.
  • Pre-lube crank seals and verify orientation; inspect crank snout and wear sleeves.

Warranty

Interstate-McBee new parts include manufacturer warranty coverage. Contact us with your ESN for the most accurate policy details for this set.

Why Buy From CPP Diesel

  • ESN-verified fitment support from real diesel techs
  • Fast shipping and hassle-free returns
  • Deep catalog for Cummins B-Series engines

FAQ

Does M-3802375 include front and rear main seals?
Yes—this lower kit includes front & rear crankshaft seals along with gear housing and cover gaskets.
Is this only for “truck” 4BT applications?
No—while many shoppers reference 1989–1998, this kit is used across 4B3.9 industrial, commercial, and genset applications. Verify by ESN.
Do I also need an upper set (head gasket kit)?
For a full reseal, pair this lower set with the correct upper (head) set for your 3.9L configuration.
How does this compare to OEM Cummins 3802375?
Interstate-McBee builds to OEM-equivalent specs for fit and function, offering a cost-effective alternative to the genuine Cummins boxed kit.
What years does it cover?
Commonly listed with 4BT “1989–1998” use cases; broader 4B3.9 coverage is approximately 1983–Apr 2003 depending on ESN and configuration.
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Additional Information

YEAR:
1989-1998
MAKE:
DODGE
ENGINE:
3.9L
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