Product Description
The Genuine Cummins 3942565 valve tappet restores precise valve actuation in your 5.9L 24-valve (1998.5-2002) ISB/QSB engine. Built to OE metallurgy and finish, this tappet features the correct flat-tappet geometry and crown design to protect your camshaft lobes and ensure long-term durability. Whether you’re doing a cam/lifter refresh or simply refreshing your valvetrain, count on this part to deliver quiet, consistent operation, stable lash, and full Cummins traceability.
Fitment is straightforward: designed for Dodge Ram 2500/3500 trucks with the 5.9L 24-valve ISB (VP44) engine from model years 1998.5–2002. It is **NOT** compatible with the earlier 12-valve (1989–1998) which uses part 3931623, nor the later common-rail models which often use part 3947759.
Fitment Details:
• Engine: 5.9L (359 CID) 24-Valve B-Series / ISB / QSB
• Model Years: 1998.5 – 2002 (Ram 2500/3500)
• Quantity Required: 12 per engine (sold individually)
Cross-Reference / Alternatives:
For earlier 12-valve 5.9L: CUMMINS 3931623
For later common-rail 5.9L 24-valve: CUMMINS 3947759
FAQ
Will this fit my 1998.5–2002 5.9L 24-valve Cummins engine?
Yes — this is the exact stock-style flat tappet for the 24-valve ISB using part 3942565.
How many tappets do I need?
You should order 12 tappets for the full engine (one per valve).
Is this the same as the 12-valve or common-rail tappet?
No — the 12-valve uses part 3931623 and the later common-rail 5.9L often uses part 3947759.
| Specifications for CUMMINS 3942565 | |
|---|---|
| Manufacturer | Cummins |
| Part Number | 3942565 |
| UPC | — (not publicly listed) |
| GTIN | — (not publicly listed) |
| Shipping Weight | approx 0.23 lb / 0.234 lb |
| Fitment | 5.9L 24-valve ISB/QSB (1998.5-2002) Dodge Ram 2500/3500 |
| Cross Reference | 3931623 (12-Valve), 3947759 (later 24-Valve common-rail) |
| E-Codes | — |
| Prop 65 | Refer to P65Warnings.ca.gov |
