TUBE AS 3284828 - Caterpillar

1. Disconnect wires (2) from the valve cover bases. Remove glow plug harnesses (1).2. Remove valve cover bases (3). 3. Disconnect elbow (4) to temperature regulator housing (7).4. Remove bracket (5) and bracket (6). Remove bracket (8). Remove the remainder of the (3/8 in) head bolts. Remove lifting bracket (9).5. Install three 5/16 in-18 NC Forged Eyebolts in the cylinder head. Fasten a hoist to the cylinder head. 6. Remove cylinder head bolts (10). Remove the cylinder head. The weight of the cylinder head is approximately 90 kg (198 lb) for the 3408 engine and approximately 172 kg (380 lb) for the 3412 engine.
Do not put the cylinder head down on a flat surface. Direct injection nozzles extend out from the bottom surface of the cylinder head and will be damaged by the weight of the head.
A new spacer plate gasket must be installed when the cylinder head is removed. See Remove & Install Spacer Plate.Install Cylinder Head Assemblies
1. Thoroughly clean the spacer plate and bottom surface of the cylinder head. Install a new head gasket and water seals. Do not use any adhesives. A new spacer plate gasket must be used when the cylinder head is installed. See Remove & Install Spacer Plate. 2. Put the cylinder head into position on the spacer plate. Be careful not to damage the head gasket or water seals. 3. Put 5P-3931 Anti-Seize Compound on the threads of head bolts (1). Install the cylinder head bolts and washers and tighten as follows: a. Tighten bolts 1 through 20 in number sequence to 270 25 N m (200 20 lb ft).b. Tighten bolts 1 through 20 in number sequence to 447 20 N m (330 15 lb ft).c. Tighten bolts 1 through 20 in number sequence again to 447 20 N m (330 15 lb ft.4. Install glow plug harness (2). 5. Put rocker shaft assembly (4) into position on the cylinder head. Put 5P-3931 Anti-Seize Compound on bolts (3). Install rocker shaft assembly bolts and washers. Tighten the bolts as follows: a. Tighten bolts 21 through 26 in number sequence to 270 25 N m (200 20 lb ft).b. Tighten bolts 21 through 26 in number sequence to 447 20 N m (330 15 lb ft).c. Tighten bolts 21 through 26 in numbers sequence to 447 20 N m (330 15 lb ft). 6. Install bracket (6) and spacer (5) on the cylinder head. Tighten bolts (9) finger tight. Install the bolt that holds bracket (6) to the automatic timing advance housing and tighten to standard torque. Tighten bolts (9) to 43 7 N m (32 5 lb ft).7. Install bracket (8). Tighten bolts (11) finger tight. Tighten bolts (7) to standard torque. Tighten bolts (11) to 43 7 N m (32 lb ft).8. Follow Step 6 for bracket (12).9. Put 5P-3931 Anti-Seize Compound on the remainder of 3/8" head bolts (10) and tighten