HAMILTON CAMS 07-C-001 ZINC ADDITIVE FOR CAMSHAFT BREAK-IN

Protect flat-tappet camshafts during first fire-up and early miles. Hamilton’s 07-C-001 zinc additive boosts ZDDP levels to the sweet spot for cam and lifter survival during break-in on Cummins and other flat-tappet engines. With modern low-ZDDP diesel oils, this bottle typically brings zinc/phosphorus to ~1500–1650 ppm, ideal for flat-tappet cams.

Fitment / Use

• Universal for flat-tappet engines; recommended for Cummins 5.9L & 6.7L builds (89–present depending on valvetrain).
• When to use: every oil change in competition engines; at least for break-in on daily drivers.

How To Use

• Mix entire bottle with the engine oil used for break-in (follow your cam builder’s procedure).
• Prime the oiling system before first start; vary RPM during initial run-in; change oil and filter per builder’s instructions.

Cross-Reference / Complementary Parts

• Hamilton 1.45" Tappets Set (budget): 07-T-001
• Hamilton 1.45" DLC-Coated Billet Tappets (performance): 07-T-002
• Hamilton 188/220 Cast Camshaft: 07-C-188/220
• Hamilton 188/220 Steel Camshaft: 07-C-188/220S
• Hamilton Bronze Cam Retainer (’89–’07 5.9L): 07-C-RETAINER
• Hamilton Bolt-On Cam Retainer (’89–’18 Cummins): 07-C-002
• Cummins OEM Valve Tappet (24-valve, example): 3942565

FAQ

Flat-tappet cams rely on anti-wear chemistry (ZDDP). Modern oils often have reduced ZDDP; this additive restores levels to ~1500–1650 ppm to protect the cam and tappets during initial run-in.

Yes—use it for the initial break-in oil fill on street trucks. Competition engines may benefit from using it at every oil change; always follow your cam builder’s guidance.

Always pair a new cam with correct tappets and retainers. Consider Hamilton tappets (07-T-001 or 07-T-002) and a retainer (07-C-RETAINER or 07-C-002).

Use the full bottle with your break-in oil to achieve target ZDDP levels. If your oil already contains elevated ZDDP, adjust per your cam builder’s recommendation.