Product Description
Cummins 3284623 — Genuine Tappet / Push Rod Cover Gasket for 5.9L
MPN: 3284623 | Also Known As: tappet cover gasket, push rod cover gasket, side cover gasket | Cross-Refs (ID only): 3900545, 3904776, 3907617, 3928832
Genuine Cummins molded gasket that seals the tappet (push rod) cover to the cylinder block on pre–common-rail 5.9L engines. Ideal for leak repairs or top-end refresh. Install with clean, dry, flat mating surfaces for best results.
Features & Benefits
- OE sealing profile to stop oil seepage at the tappet/push rod cover.
- Direct-fit for 5.9L 12V & 24V VP44 engines (1989–2002 automotive).
- Durable elastomer construction for heat and oil resistance.
- Prevents mess & contamination around the block side cover area.
- Backed by Cummins quality for fit, function, and service life.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1993 | 5.9L 12V (6BT) | Ram 2500/3500 |
| 1994–1998 | 5.9L 12V (6BT) | Ram 2500/3500 |
| 1998.5–2002 | 5.9L 24V ISB (VP44) | Ram 2500/3500 |
Industrial/Off-Highway: Common on BS3-era B-Series (ISB/QSB/6B5.9). Verify by ESN before ordering.
Compatibility Notes:
- Automotive coverage targets 1989–2002 5.9L non-common-rail. 2003+ common-rail uses a different cover/gasket set.
- When servicing leaks, inspect the metal tappet cover for warpage and replace grommets/bolts as needed.
Specifications
- Type: Tappet / push rod cover perimeter gasket
- OE Part Number: 3284623
- Cross-References (ID): 3900545, 3904776, 3907617, 3928832
- Quantity Required: 1 per engine (sold individually)
Often Paired With
- Tappet cover (’89–’98): Cummins 3990732
- Grommet: 3900267 (’89–’98 bolt grommet) · 3928759 (’98.5–’02 grommet)
- Bolt kit: XDP XD620 (for OEM cover)
- Valve cover gasket / upper engine set (when resealing the top end)
What’s In The Box
- (1) Genuine Cummins Tappet / Push Rod Cover Gasket (3284623)
- Hardware/grommets sold separately (see “Often Paired With”).
Installation Tips
- Clean both mating surfaces; remove old sealant and debris. Check cover flatness.
- Install gasket dry unless your service manual specifies sealant at corners.
- Tighten fasteners evenly in a crisscross pattern to factory torque.
- After warm-up, recheck for seepage and retorque if required per OE procedure.
FAQ
WILL THIS FIT MY 1989–2002 5.9L CUMMINS RAM?
Yes—3284623 is specified for 1989–2002 5.9L (12V & 24V VP44) Ram 2500/3500. Confirm by VIN/ESN.
IS THIS THE SAME AS A “PUSH ROD COVER” OR “SIDE COVER” GASKET?
Yes—tappet cover, push rod cover, and side cover refer to the same housing on the B-Series block.
DOES IT INCLUDE GROMMETS OR BOLTS?
No—order grommets/bolts separately (common: 3900267 for ’89–’98, 3928759 for ’98.5–’02) or an aftermarket bolt kit.
SHOULD I USE RTV OR SEALANT?
Install dry on clean surfaces unless your Cummins procedure calls for a small dab at specific corners.
WILL THIS FIT 2003+ 5.9L OR 6.7L?
No—common-rail engines use different cover/gasket designs. Check by VIN/ESN for 2003+ applications.
