3408C ENGINE FOR CATERPILLAR BUILT MACHINES Caterpillar


Cylinder Heads

Usage:

(1) Large bolts (3/4 in). Put 2P2506 Thread Lubricant on the bolt threads and tighten the bolts in the step sequence that follows:

1. Tighten bolts from 1 to 10 in number sequence to ... 270 ± 25 N·m (200 ± 20 lb ft)

2. Tighten bolts from 1 to 10 in number sequence to ... 470 ± 20 N·m (345 ± 15 lb ft)

3. Tighten bolts from 1 to 10 in number sequence again to ... 470 ± 20 N·m (345 ± 15 lb ft)

4. Install the rocker arms for the engine valves and the remaining (3/4 in) bolts.

5. Tighten bolts from 11 to 18 in number sequence to ... 270 ± 25 N·m (200 ± 20 lb ft)

6. Tighten bolts from 11 to 18 in number sequence to ... 450 ± 20 N·m (330 ± 15 lb ft)

7. Tighten bolts from 11 to 18 in number sequence again to ... 450 ± 20 N·m (330 ± 15 lb ft)

8. The following is the tightening procedure for the 3/8inch cylinder head bolts.

Four bolts marked X:

a. Tighten bolts marked X finger tight.

b. Tighten timing gear housing to bracket bolts with standard torque.

c. Tighten bolts marked X to ... 44 ± 7 N·m (32 ± 5 lb ft)

Bolts marked Y and Z:

a. Tighten bolts marked Z finger tight.

b. Tighten bolts marked Y to standard torque.

c. Tighten bolts marked Z to ... 44 ± 7 N·m (32 ± 5 lb ft)

Tighten the remaining 3/8 bolts (2) to ... 44 ± 7 N·m (32 ± 5 lb ft)

(2) Small bolts (3/8 in). See Step 8, above.

(3) Torque for eight studs in each cylinder head ... 35 ± 5 N·m (25.9 ± 3.7 lb ft)

(4) Height of cylinder head (new) ... 112.78 ± 0.25 mm (4.440 ± .010 in)

Minimum permissible thickness of cylinder head ... 111.51 mm (4.390 in)

Caterpillar Information System:

3408C ENGINE FOR CATERPILLAR BUILT MACHINES Valves, Valve Springs And Valve Seat Inserts
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Valve Rocker Arms, Lifters And Bridges
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Valve Mechanism Covers
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Primary Fuel Filter And Fuel Filter Base
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Fuel Ratio Control
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Fuel Transfer Pump
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Fuel Transfer Pump Drive
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Governor And Fuel Pump Drive
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Governor Drive And Oil Pump
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Fuel Injection Pump Housing
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Governor
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Fuel Injection Lines
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Camshaft
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Front Timing Gears
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Timing Gear Housing
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Rear Gear Group
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Exhaust Manifolds
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Inlet Air And Exhaust Lines
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Dust Ejector Group
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Air Cleaner Group
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Muffler Group
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Turbocharger
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Oil Filters
3408C ENGINE FOR CATERPILLAR BUILT MACHINES Oil Breather Cap
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