3304 & 3306 NATURAL GAS ENGINES Caterpillar


Spark Plugs, Spark Plug Adapters

Usage:

Remove and Install Spark Plugs

1. Remove covers (1) from the spark plugs and adapters.

2. Use tool (A) to remove the spark plugs (2).

3. Use tool (A) to install the spark plugs (2). Tighten the spark plugs to a torque of 25 ± 4 lb.ft. (35 ± 5 N·m).

4. Install the spark plug covers (1). Make sure the cover makes a good connection with the spark plug.

Remove and Install Spark Plug Adapters

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

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