Product Description
Genuine Cummins
Cummins 3283338 — Cylinder Head Gasket (+.020 Thickness) for 3.9L 4BT
MPN: 3283338 | Also Known As: head gasket, +.020 oversize | Used On: 3.9L B-Series (4BT), Tier 2-era applications
Why This Part
- ✓ +.020 oversize gasket to recover proper compression after head/block machining.
- ✓ OE sealing for combustion, oil, and coolant passages.
- ✓ Direct-fit for 3.9L 4BT B-Series—built to Cummins specs.
- ✓ Reduces risk of cross-leaks and restores long-term reliability.
OE Fit +.020 Thickness 1 Per Engine
Quick Specs
| Type | Cylinder head gasket (+.020 in. thickness) |
|---|---|
| OE Part # | 3283338 |
| Platform | Cummins 3.9L 4BT B-Series (Tier 2-era) |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive/MD/Industrial)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | Cummins 3.9L 4BT (B-Series) | Step vans / medium-duty / industrial & off-highway (verify by ESN) |
Notes: Commonly specified where the head or block deck has been machined. Always verify thickness and ESN before ordering.
Often Paired With
- Head bolts or studs: choose a kit confirmed for 3.9L 4BT by ESN
- Upper gasket set: for intake/exhaust and coolant seals
- Coolant & oil service: refill with fresh fluids after reassembly
- Surface prep: straightedge check and proper torque sequence to spec
What’s In The Box
- (1) Genuine Cummins Cylinder Head Gasket, +.020 (3283338)
Install Tips
- Confirm required thickness based on measured material removal.
- Clean/degrease surfaces; verify flatness and finish.
- Use new fasteners when required; follow factory torque pattern & angles.
FAQ
IS 3283338 THE +.020" THICKNESS GASKET?Yes—3283338 is the +.020" head gasket commonly used when the head and/or block has been machined.
WHAT ENGINES USE THIS GASKET?3.9L Cummins 4BT B-Series, primarily Tier 2-era applications. Verify by engine serial number (ESN).
WILL THIS FIT A RAM 5.9L OR 6.7L?No—this is for 3.9L 4BT. For Ram 5.9L/6.7L ISB, see their specific gaskets.
DO I NEED NEW HEAD BOLTS OR STUDS?Recommended. Use fasteners specified for the 3.9L 4BT and follow torque/angle procedures.
HOW DO I PICK THE CORRECT THICKNESS?Measure material removed from the head/block and consult Cummins service data; choose +.020" when required by machining.
