G3612 and G3616 Engines Caterpillar

Illustration 1	g00911845

(1) Bolt

Diameter ... 3/8

1. Seat the prechamber assembly into the bore of the cylinder head by alternate tightening of the bolts.

2. Loosen the bolts once the prechamber assembly is seated in the bore of the cylinder head.

3. Alternate the tightening of one bolt to the other bolt. Tighten the hold down bolts:

   Torque ... 5 N·m (44 lb in)

4. Tighten hold down bolts by the following degrees:

   Degrees of rotation ... 60

5. Tighten hold down bolts by the following additional degrees:

   Degrees of rotation ... 60

6. Tighten hold down bolts by the following additional degrees:

   Degrees of rotation ... 60

Note: The total degrees of turn from the initial torque of 5 N·m (44 lb in) is 180 ± 5 degrees. Inadequate turning of the bolt may shorten the life of the bolt. Turning the bolt not far enough can lead to an inadequate load on the gasket. This may result in coolant leaks into the combustion chamber.

(2) Plug

Torque ... 15 N·m (11 lb ft)

(3) O-rings

Lubricate the O-ring with 5N-5561 Silicone Lubricant prior to assembly.

(4) Check valve

Torque ... 115 ± 15 N·m (85 ± 11 lb ft)