Product Description

CUMMINS 5273413 OEM CAMSHAFT GEAR – ISB 5.9L/6.7L (2003–2018)

The CUMMINS 5273413 OEM CAMSHAFT GEAR is the genuine camshaft drive gear used on many 2003–2018 Ram 2500/3500 5.9L & 6.7L ISB Cummins applications. This hardened steel timing gear is engineered to lock onto the camshaft nose, mesh with the crankshaft gear, and keep valve timing precise under towing, tuning, and daily work duty.

Unlike generic offshore copies, this is a new OE Cummins 5273413 cam gear built to factory tooth profile and hardness spec for quiet operation and long life. It’s the right choice when you’re rebuilding an ISB, replacing a slipped gear, or refreshing a high-mileage 5.9L/6.7L common-rail.

High impact tags: genuine Cummins 5273413 camshaft gear, 03-18 Ram 2500 3500 5.9L 6.7L ISB cam gear, OEM Cummins timing gear, ISB6.7 QSB6.7 camshaft drive gear, Cummins 5273412 crankshaft gear, Cummins 3902332 camshaft key, Cummins 4934041 timing gear case, Cummins 3929028 camshaft gear, Ram common-rail Cummins cam gear replacement.

Fitment – 5.9L & 6.7L ISB Cummins

• 2003–2007 Ram 2500/3500 5.9L ISB (24V Common-Rail)
• 2007.5–2018 Ram 2500/3500 6.7L ISB (24V Common-Rail)
• Industrial / Off-Highway: ISB6.7 & QSB6.7 applications where Cummins lists 5273413 – verify by ESN.

Important: Cummins notes primary usage on later EPA-era ISB/QSB engines. Always confirm by VIN/Engine Serial Number in QuickServe, especially on late-year 6.7L trucks and industrial builds where timing sets may differ.

Why Choose Genuine Cummins 5273413?

• OE-Correct Timing: Matches factory tooth count, pressure angle, and helix to keep cam/crank sync on ISB platforms.
• Hardened Steel Construction: Designed to survive high cylinder pressures, towing heat, and tuned power levels.
• Direct-Fit Replacement: Bolts to the cam nose with the OE woodruff key and hardware – no machining or guessing.
• Quiet, Stable Operation: Proper gear mesh helps reduce timing noise and long-term wear on the valvetrain.
• Backed by Cummins Engineering: Built and cataloged for ISB6.7/QSB6.7 and 5.9/6.7 Ram common-rail engines.

Cross-Reference & Related Cummins Parts

This camshaft gear is commonly referenced in timing and short block assemblies alongside other genuine Cummins parts:

• CUMMINS 5273412 OEM CRANKSHAFT GEAR – ISB 5.9L/6.7L (2003–2018) – Mates with 5273413 to drive the timing set.
• CUMMINS 3902332 OEM CAMSHAFT KEY (PLAIN WOODRUFF) – Locks the cam gear to the camshaft nose.
• CUMMINS 4934041 OEM TIMING GEAR CASE HOUSING – ISB 6.7L (2007.5–2018) – Front gearcase that houses the timing set.
• CUMMINS 3929028 OEM CAMSHAFT GEAR – RAM 5.9L 12V (1989–2000) – OE cam gear for earlier 12-valve applications.

Cross-reference IDs (for identification only, not substitutions without catalog verification): 3949358, 3965391, 5273732. This gear is also included in certain Cummins recon short-block and long-block kits.

What’s In The Box

• (1) Genuine Cummins 5273413 camshaft drive gear

Note: Camshaft key, thrust plate/retainer, crankshaft gear, and hardware are sold separately.

Installation Notes

• Clean the camshaft nose, keyway, and gear bore; remove rust, burrs, and old threadlocker.
• Install a new camshaft woodruff key if there is any sign of fretting or looseness.
• Align factory timing marks on the cam and crank gears before torquing fasteners.
• Follow Cummins torque specs and procedure for your ESN – including angle torque where specified.
• After installation, verify camshaft end-play and inspect the thrust plate/retainer for wear.

FAQ – CUMMINS 5273413 CAMSHAFT GEAR

WILL THIS CAM GEAR FIT MY 2003–2018 RAM 5.9L/6.7L CUMMINS?

It is widely cataloged for 2003–2018 Ram 2500/3500 5.9L & 6.7L ISB common-rail engines. However, Cummins’ own catalog notes primary usage on later EPA-era ISB/QSB engines, so we always recommend confirming by VIN/Engine Serial Number in Cummins QuickServe before ordering.

IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?

This listing is for a genuine Cummins OEM camshaft gear with part number 5273413, sourced through authorized Cummins channels. It is not a reboxed or off-brand aftermarket copy.

WHAT OTHER PARTS SHOULD I REPLACE WITH THE CAMSHAFT GEAR?

At minimum, inspect or replace the following while you are in the timing set:

• CUMMINS 3902332 OEM CAMSHAFT KEY – replaces worn or fretted keys.
• CUMMINS 5273412 OEM CRANKSHAFT GEAR – match wear patterns if the old cam and crank gears are damaged.
• CUMMINS 4934041 TIMING GEAR CASE – on high-mileage or damaged housings.

Also inspect the camshaft thrust plate/retainer and front seal; replace any component that shows scoring or excessive wear.

DOES THIS GEAR WORK ON 12-VALVE OR VP44 24-VALVE (1994–2002) ENGINES?

No. Those engines typically use earlier camshaft gear part numbers. For 1989–2000 5.9L 12-valve applications, see the genuine CUMMINS 3929028 OEM CAMSHAFT GEAR instead.

HOW DO I CONFIRM FITMENT FOR INDUSTRIAL ISB6.7/QSB6.7 APPLICATIONS?

Industrial and off-highway engines can have different timing sets depending on CPL, emissions certification (E-codes), and build date. Use your Engine Serial Number in Cummins QuickServe or contact CPP Diesel with the ESN so we can confirm that 5273413 is correct before you order.

Specifications for cummins 5273413