CPP 3924962/ 3900633 TIMING GEAR HOUSING MOUNTING BOLTS FOR 89-98 CUMMINS 5.9L 12V

Product Description

Lock down your 12-valve build the right way. The CPP 3924962 / 3900633 Timing Gear Housing Mounting Bolts are OE-style fasteners engineered to secure the timing gear case to the block on 1989–1998 Cummins 5.9L 12V engines. Correct lengths, proper thread engagement, and consistent clamp load help stop seepage, silence vibrations, and keep your timing set happy—whether it’s a work truck or a weekend ripper.

CPP timing gear housing bolts, Cummins 3924962, Cummins 3900633, 6BT 5.9 12-valve, Dodge Ram 2500 3500, gear case hardware, front cover housing bolts, KDP service, leak fix, OE replacement fasteners, CPP Diesel

GEAR HOUSING NOT INCLUDED, BOLT KIT ONLY. PICTURE TO BE USED ONLY FOR REFERENCE

Fitment

• Vehicle: Dodge Ram 2500/3500
• Engine: Cummins 5.9L 12-Valve (1989–1998)
• Location: Timing gear housing (gear case) to engine block
• OE Cross-References: 3924962, 3900633

Cross-Reference / Related CPP Products (CPP links only)

• CPP 3924962 / 3900633 TIMING COVER BOLTS (89–02 12V/24V)
• CPP 3901445 / 3926846 TIMING GEAR CASE MOUNTING BOLTS (98.5–18 24V)
• CPP 3913638 REAR OIL SEAL HOUSING MOUNTING BOLTS (89–18)
• CPP 3920400 OIL PAN BOLTS (89–18)
• CPP KILLER DOWEL PIN PREMIUM REPAIR KIT (89–02)
• CPP KILLER DOWEL PIN TAB (94–98)

Why CPP Hardware

• OE-style head & shank geometry for proper clamping
• Ready for KDP service and front cover reseals
• Built to CPP Diesel spec for durability and repeatable torque

FAQ

Do these directly replace Cummins 3924962 and 3900633?

Yes. This CPP set is built to OE-style spec for the timing gear housing on 5.9L 12-valve Cummins (1989–1998).

Will they fit 24-valve applications?

This kit targets the 12-valve (’89–’98) gear case. For 24-valve (’98.5–’18) use the CPP 3901445 / 3926846 kit linked above.

What torque should I use?

Follow the Cummins service manual for your ESN and fastener size. Clean threads, verify gasket alignment, and use threadlocker only where specified.

Can I install these during a KDP fix?

Absolutely. Pair with the CPP KDP kit or KDP tab while the cover is off to lock the dowel pin.

Specifications for CPP 3924962 / 3900633