|1989-1998||Dodge||12V 5.9L Cummins
The Industrial Injection 5.9L 12v Cummins Premium Stock Plus Head w/ Fire Ring Grooves are designed to be an affordable and extremely reliable head complete and ready to bolt on.
Part Number: PDM-12VSTKH-FR
- Fire Ringed Head
- High Strength Alloy Valve Guides
- New Performance Stainless Steel Valves
- Jet Washed
- Port development is accomplished using a superflow 600 flow bench with a computer recording all flow measurements.
- New High Strength Alloy, Heat Treated iron-based valve guides are installed.
- Industrial Injection uses the highest quality brand new performance 150lb valve springs.
Port development is accomplished using a superflow 600 flow bench with a computer recording all flow measurements.
Many things are considered when designing a cylinder head Port; airflow is only one of the things to think about. Another major concern is port wall thickness.
Anyone can get a head to produce high flow numbers, but doing so leaves the port wall too thin causing the casting to crack. High-performance Diesel heads are more prone to crack because of the thermal shock experienced by excessive intermittent or long-term exhaust temperatures.
New High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 â€œCâ€ Scale, which produces the ultimate in wear resistance. This is far superior to the original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.
Guides are then honed (not reamed) to the exact size using a diamond honing mandrel. Diamond abrasives allow for consistency of size, surface finish, and bore geometry with no variation from guide to guide. The guide size is then verified using a valve guide bore gauge.
Next, the head is treated to a multi-angle valve job to help maximize the flow of air in and out of the head. This is accomplished using a Serdi 100 guide and seat machine. Serdi uses a solid carbide straight-shank pilot. When inserted into the valve guide, it simulates the real valve stem during the centering process. This guarantees the valve seat is finished for a perfect valve-to-seat match.
Using CBN or Diamond tooling the head is given a new surface. With Industrial Injections berco milling machine, they can control the surface finish to accommodate different head gasket types. For example, MLS head gaskets require a very smooth surface finish.
Finally the head is jet washed dried and assembled with new valve seals and new performance valve springs.