ENGINE AR-PRIMARY 4586516 - Caterpillar

Ensure that wiring harness are correctly routed and the cable straps are not over tightened. Over tightening of the cable straps will damage the wiring harness convoluting.
Thoroughly clean the gasket surfaces of the cylinder head and the cylinder block. Do not damage the gasket surfaces of the cylinder head or the cylinder block. Ensure that no debris enters the cylinder bores, the coolant passages, or the lubricant passages.
Inspect the gasket surface of the cylinder head for distortion. Refer to Specifications, "Cylinder Head" for more information. If the gasket surface of the cylinder head is distorted beyond maximum permitted limits, replace the cylinder head.
Illustration 1 g03654602
Inspect dowels (16) for damage. If necessary, replace the dowels in the cylinder block.
Align a new cylinder head gasket (17) with dowels (16). Install new cylinder head gasket (17) onto the cylinder block.
Install Tooling (B) to the cylinder block.
Use a suitable lifting device to lift cylinder head. The weight of the cylinder head is approximately 96 kg (212 lb). Note: A spreader bar must be used to distribute the weight of the cylinder head during the lifting operation.
Use Tooling (B) to align the cylinder head with the cylinder block. Install the cylinder head to the cylinder block. Note: Ensure that the cylinder head is correctly positioned on dowels (16).
Remove Tooling (B).
Illustration 2 g03654605
Clean bolts (14). Follow Step 9.a for the procedure to inspect the bolts.
Use a straight edge to check the threads of the bolts. Refer to Illustration 2. Replace any bolts that show visual reduction in the diameter of the thread over Length (Y).
Lubricate the threads and the shoulder of bolts (14) with clean engine oil.
Illustration 3 g03654606
Illustration 4 g03654607
Install bolts (14) to cylinder head (15).
Tighten bolts (14) to a torque of 50 N m (37 lb ft) in the numerical sequence that is shown in Illustration 4.
Tighten bolts (14) to a torque of 100 N m (74 lb ft) in the numerical sequence that is shown in Illustration 4.
Use Tooling (C) to turn bolts (14) through an additional 225 degrees in the numerical sequence that is shown in Illustration 4.
If necessary, install the water temperature regulator to the cylinder head. Refer to Disassembly and Assembly, "Water Temperature Regulator - Remove and Install" for the correct procedure.
Illustration 5 g03654584
Connect harness assembly (8) to coolant temperature sensor (9).
Use Tooling (D) in order to lubricate the O-ring seals. Install O-ring seal (12) and O-ring seal (13) to bypass tube (10).
Install bypass tube (10) to the cylinder head. Install bolts (11) and tighten the bolts to a torque of 22 N