Product Description
Interstate-McBee M-3929734 OEM Replacement Camshaft – 1989–1998 5.9L Cummins 12-Valve
Direct-fit replacement camshaft for the 1989–1998 Dodge Ram 2500/3500 with the 5.9L Cummins 12-valve (6BT). This cam restores proper valve timing and drivability in stock and lightly modified engines. Factory-style profile. Not a performance regrind.
- OE-equivalent profile: Matches stock timing events for reliable power and emissions compliance.
- Hardened journals & lobes: Built for long service life with proper lubrication and break-in.
- Drop-in fit: Designed to work with stock valve springs, retainers, and keepers.
- Interstate-McBee quality: Trusted aftermarket supplier for B-Series Cummins components.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3929734 |
| OEM Reference | Cummins 3929734 |
| Engine | 5.9L Cummins 12-Valve (6BT) |
| Sold As | Each (1 camshaft) |
| Intended Use | Stock replacement / OE-equivalent |
What’s Included
- (1) Camshaft, P/N M-3929734
Recommended/Related Parts
- New lifters/tappets (recommended any time a cam is replaced)
- Camshaft retainer/thrust plate and bolts
- Timing gear (inspect and replace if worn), front seal, timing cover gasket set
- Assembly lube and high-zinc break-in oil
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 with 5.9L Cummins 12-valve (6BT)
- Model Years: 1989–1998
- Other B-Series applications using Cummins 3929734 (confirm by ESN or parts catalog).
Install Notes
- Pre-lube all journals and lobes with quality assembly lube.
- Replace lifters/tappets with the new camshaft. Mixing old lifters with a new cam can cause rapid wear.
- Verify timing marks during reassembly; follow the Cummins service manual for torque specs and procedures.
- Prime the oil system before first start. Use high-zinc break-in oil and follow proper break-in procedure.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, competitive pricing
- Deep inventory of complementary B-Series valvetrain & gasket parts
FAQ
Is this a performance cam?
No. This is an OE-replacement profile intended to restore factory performance and reliability.
Do I have to replace the lifters?
Yes, strongly recommended. New lifters help ensure proper break-in and longevity.
Will this fit a 24-valve (1998.5–2002)?
No. This part is for 12-valve engines only.
