G379, G398 & G399 ENGINES Caterpillar


Spark Plug And Adapters

Usage:

(1) Spark plug adapter. Put liquid soap in the seal groove and on the seal before installing the adapter in the cylinder head. Put 5P3931 Anti-Seize Compound on adapter threads.

Tighten the adapter to a torque of ... 200 ± 13 N·m (150 ± 10 lb ft)

(2) Torque for spark plug ... 35 ± 5 N·m (26 ± 4 lb ft)

(3) Gap of the spark plug ... 0.33 to 0.41 mm (.013 to .016 in.)

Gap of the spark plug (low emission) ... 0.38 (.015 in.)

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