Valve springs are meant to prevent valve float and improve overall performance
Heavy duty pushrods prevents loss in valve lift or retarded timing
Modification Required:
On a 24 valve engines, you will need .018″ or less piston protrusion and at least .038″ valve face depth with a standard gasket. If you do not meet the minimum requirements for piston to valve clearance, don’t worry, you can still run an oversize head gasket or cut valve reliefs.
Applications:
works great on 24v applications with 66mm or smaller charger for low rpm or with large singles at higher rpm.
moderate singles, or set of compounds on 24v engines except vp-44 trucks, you will need a 178-208
Weekend warrior
Drag strip
Stock class pulling
Break in:
To make sure that you have no issues during break-in, follow these few suggestions.
Make sure that the cam has a Liberal amount of quality assembly lube applied
DO NOT let the engine start without oil pressure
When this is a new engine, be sure to put a liberal amount of assembly lube in the oil pump and prime the oil filter
Be sure to change the oil after you have done your break-in procedure. When the filter and oil system are already primed, engine will get oil pressure much faster than if the oil is changed at the same time.
Disconnect the fuel system and spin the engine with the starter until oil pressure can be read or until oil is coming out of the rocker arms.
Do not let the starter run for more than 10 seconds at a time
Once oil pressure has been verified, let the engine start and run for five minutes at 1200-1500rpm then shut engine down
Adjust valves then you are cleared to abuse your engine. Enjoy the added airflow
if you need to re-torque or “hot-torque “the head, do so before adjusting valves. Re-torqueing the head changes the valve lash setting, so it is important to set lash last.
Approved oil — required. Use a 15W-40 (or 5W-40 in sub-zero conditions) with adequate zinc, phosphorus, and molybdenum. Thin or low-additive oils don’t provide the shear strength a flat tappet needs. Approved oils:
Valvoline Full Synthetic 15W-40
Valvoline Synthetic Blend 15W-40
Valvoline All-Terrain 15W-40
Schaeffer’s 15W-40
Mobil Delvac Extreme 15W-40
LIQUI MOLY Touring High Tech 15W-40
Driven Racing Oil 15W-40
Redline 15W-40
Acceptable:
Shell Rotella T6 Full Synthetic 15W-40
Shell Rotella T5 15W-40
Application and Fitment Coverage
The 24 Valve 188/220 Camshaft Combo is a Cummins camshaft used across these Hamilton Cams Cummins application groups.
1998.5–2002 5.9L 24-valve Cummins
2003–2007 5.9L common-rail Cummins
2007.5–2018 6.7L Cummins
Original Hamilton Cams reference terms include Cummins 24 Valve Cams.