3306 NATURAL GAS ENGINE Caterpillar

start by:

a) remove spark plugs

1. Drain the coolant from the cooling system to a level below the cylinder head.

2. Use tool (A) to remove the spark plug adapters (1) and gaskets.

3. Install a new seal (3) and gasket (2) on each of the spark plug adapters (1). Put liquid soap on the seal and in the bore of the cylinder head. Put 5P3931 Anti-Seize Compound on the threads of the spark plug adapters.

4. Install the spark plug adapters in the cylinder head. Use tool (A) to tighten the adapters to a torque of 70 ± 5 lb.ft. (95 ± 7 N·m).

5. Fill the cooling system with coolant to the correct level.

end by:

a) install spark plugs