2000/09/01 Caterpillar

Truck Engines:

C-15 (S/N: 6NZ1-UP)

C-16 (S/N: 7CZ1-UP)

3406E (S/N: 1LW1-UP; 1MM1-UP; 2WS1-UP; 5DS1-UP; 5EK1-UP; 6TS1-UP)

Truck Engine News, SEBD6727, September 2000, "Be Sure To Order The Correct Remanufactured Cylinder Head". Disregard this article. Two serial numbers were omitted from this article. The serial numbers that were omitted are S/N:1MM
and S/N:; 2WS
. This article has been replaced by the following article.

Be sure to order the correct remanufactured cylinder head for these truck engines. Refer to Table 1 for the correct part number of the remanufactured cylinder head.

Table 1

Truck Engine / Serial Number Prefix	Part Number of Standard Remanufactured Cylinder Head (1)	Part Number of "Upgrade-to-New" Remanufactured Cylinder Head
3406E / S/N:5EK 3406E / S/N:6TS	0R-8628	0R-7594
3406E / S/N:1LW 3406E / S/N:5DS 3406E / S/N:2WS 3406E / S/N:1MM C-15 / S/N:6NZ C-16 / S/N:7CZ	0R-7637

( 1 )

These remanufactured cylinder heads include updated valves and updated valve seats which provide increased service life.