Product Description
CUMMINS 3284623 OEM TAPPET / PUSH ROD COVER GASKET – 5.9L (1989–2002)
Stop messy side-cover oil leaks on your 5.9L Cummins with the genuine CUMMINS 3284623 tappet / push rod cover gasket. This molded OEM gasket seals the tappet (push rod) / side cover to the block on pre–common-rail 5.9L B-series engines, restoring factory sealing and crankcase control on high-mileage 12-valve and 24-valve ISB applications.
This is the same OEM Cummins side cover gasket used on BS3 5.9L B engines and automotive 1989–2002 Ram 2500/3500 trucks, not a generic aftermarket copy. If you are resealing a leaking tappet cover, freshening the top end, or chasing oil drips down the side of the block, 3284623 is the correct perimeter gasket to use.
Key Features
- Genuine Cummins molded elastomer gasket for precise tappet / push rod cover sealing.
- Direct-fit for 1989–2002 5.9L Cummins B-series (12V 6BT & 24V ISB VP44 automotive).
- Designed to resist heat, oil, and crankcase vapors for long service life.
- Helps prevent oil seepage, dirt buildup, and mess along the block side cover.
- Ideal any time the tappet / side cover is removed for valvetrain or lifter service.
Verified Automotive Fitment – Dodge Ram
This OEM gasket is used on pre–common-rail 5.9L Cummins engines. Automotive coverage includes:
- 1989–1993 Dodge Ram 2500/3500 – 5.9L 12V (6BT)
- 1994–1998 Dodge Ram 2500/3500 – 5.9L 12V (6BT)
- 1998.5–2002 Dodge Ram 2500/3500 – 5.9L 24V ISB (VP44)
It is also used broadly on BS3-era Cummins B-series industrial and off-highway engines where 3284623 is specified; always verify by ESN for non-automotive equipment.
Not for 2003+ common-rail 5.9L or 6.7L Cummins – those engines use different side covers and gaskets.
Cross-Reference Numbers (ID Only)
Common ID-only cross references to Cummins 3284623 include: 3900545, 3904776, 3907617, 3928832.
Recommended Cummins Companion Parts (Internal Links Only)
For a complete, leak-free repair around the tappet / side cover area, pair this gasket with these genuine Cummins components (all available at CPP Diesel):
- CUMMINS 3990732 OEM TAPPET / PUSHROD COVER – 5.9L 12V (1989–1998) – replacement stamped steel tappet / side cover for 12-valve engines.
- CUMMINS 3900267 OEM TAPPET COVER BOLT GROMMET SEAL – 5.9L (1989–1998) – genuine bolt grommet seals; six typically required per cover.
- CUMMINS 3923015 OEM CLIP / SPRING NUT – TAPPET COVER – 5.9L 12V (1994–1998) – OE spring nut hardware for the tappet cover.
- CUMMINS 3924606 OEM TAPPET COVER NOISE PANEL – 5.9L 12V (1994–1998) – sound-dampening shield that mounts over the tappet cover; uses gasket 3284623 underneath.
- CUMMINS 3938152 OEM INTAKE MANIFOLD COVER GASKET – 5.9L (1989–2002) – reseal the intake cover while you are servicing upper engine leaks.
What’s Included
- (1) Genuine Cummins 3284623 tappet / push rod / side cover gasket
Hardware, grommets, covers, and noise shields are sold separately (see Cummins companion parts above).
Installation Notes
- Thoroughly clean the block sealing surface and tappet cover; remove old gasket material and sealant.
- Inspect the metal cover for warpage or damage and replace it if needed.
- Install the gasket dry unless your Cummins procedure specifies a small dab of sealant at specific corners.
- Tighten fasteners evenly in a crisscross pattern to factory torque, then recheck for seepage after initial warm-up.
Specifications for cummins 3284623
| Parameter | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3284623 |
| UPC | Not specified by manufacturer (N/A) |
| GTIN | Not specified by manufacturer (N/A) |
| Type | Tappet / push rod / side cover perimeter gasket |
| Engine Compatibility | 5.9L Cummins B-series (12V 6BT & 24V ISB VP44, 1989–2002 automotive; BS3 B-series industrial where 3284623 is specified) |
| Chassis Compatibility (Automotive) | 1989–2002 Dodge Ram 2500/3500 with 5.9L Cummins diesel |
| Cross Reference (ID Only) | Cummins 3900545, 3904776, 3907617, 3928832 |
| E-Codes | N/A (non-emissions, non-lighting component) |
| Quantity Required | 1 per engine |
| Shipping Weight | Approx. 0.044 lb (Cummins listing, may vary slightly by packaging) |
| Package Dimensions (Shipping) | Approx. 36.0" (L) x 10.0" (W) x 0.5" (H) based on CPP Diesel listing |
| Shipping Method | Standard parcel – calculated at checkout |
| Country of Origin | Not specified by manufacturer |
| Prop 65 Warning | Not specifically listed by Cummins; handle with normal automotive chemical safety practices. |
FAQ
WILL THIS FIT MY 1989–2002 5.9L CUMMINS RAM?
Yes. CUMMINS 3284623 is the correct tappet / push rod / side cover gasket for most 1989–2002 5.9L B-series automotive engines (12V 6BT and 24V ISB VP44) used in Ram 2500/3500 trucks. Always confirm by VIN or ESN if you are unsure.
IS THIS THE SAME AS A “PUSH ROD COVER” OR “SIDE COVER” GASKET?
Yes. Terms like “tappet cover gasket,” “push rod cover gasket,” and “side cover gasket” all describe this same perimeter gasket that seals the side cover to the block.
DOES THIS GASKET FIT 2003+ COMMON-RAIL 5.9L OR 6.7L CUMMINS ENGINES?
No. 2003+ common-rail 5.9L and 6.7L Cummins engines use different side covers and gasket designs. For those engines, you must use the correct common-rail–specific parts for your ESN.
DOES THIS GASKET INCLUDE BOLTS, GROMMETS, OR HARDWARE?
No. This listing is for the gasket only. For a complete repair, pair it with genuine hardware like CUMMINS 3900267 tappet cover bolt grommet seals and related Cummins clips and panels listed above.
SHOULD I USE RTV OR SEALANT WITH THIS GASKET?
In most cases, this molded gasket is installed dry on clean, flat surfaces. Only use sealant where specifically called out in your Cummins service information (typically in small corner areas, if at all).
