Technical Bulletin

Series 60 Engine

The Series 60 engine is an in-line 6 cylinder, with wet replaceable liners, overhead cam, and electronic engine control. These are mostly used in class 8 trucks, but can also be found in industrial & generator applications as well as occasional marine applications. The Series 60 DDC diesel engine comes in 14, 12.7 & 11.1 liter designs. IPD’s focus at this time is on the 12.7L premium engines, ranging roughly from serial number 6R411,649 to serial number 6R740,000 produced from 1998 to 2003.

From the chart above we can tell that an engine model 6067PK28 is a Series 60, Six Cylinder, Automotive, 12.7 L Premium, DDEC III/ IV, 1991 & later coach engine.

There have also been a number of design changes in the piston assemblies for these engines. Although the DDEC series identifies the engine control type and not the piston design, generally speaking that breakdown is as follows:

1. Commonly referred to as DDEC I , these “first” generation engines used articulated (2 pcs.) pistons with cast iron crowns, crosshead connecting rods, and were not piston cooled. IPD Does NOT offer cylinder kits for these engines.
2. Commonly referred to as DDEC II, these “second” generation engines used articulated (2 pcs.) pistons with cast iron crowns, and crosshead “rifle drilled” connecting rods. There were also bushings in the pin bosses of these piston crowns and they were piston cooled. IPD’s cylinder kits can be used to upgrade these engines but only if the connecting rods are updated to “trunk” style and the cylinder blocks have piston cooling tubes. – IPD Does NOT offer cylinder kits for these engines except in case of the above -mentioned upgrade.
3. Commonly referred to as DDEC III & Early IV, these third generation engines used articulated (2 pcs.) pistons with steel crowns and “rifle drilled” – trunk style connecting rods (pin goes through the eye of the connecting rod). There are no bushings in the pin bosses of these piston crowns. The cylinder kits for these engines include top liner coo
4. Commonly referred to as later DDEC IV and up, these fourth generation engines used one piece steel pistons and were released in 2003. These pistons are not yet available from IPD.