ELEMENT ASSEM. 8F5437 - Caterpillar

Engine3512C (S/N: EBG1-UP)G3512E (S/N: BW31-UP; NWC1-UP; GHD1-UP; GFM1-UP; SSR1-UP; NGS1-UP; SST1-UP)G3512H (S/N: GF31-UP; GF41-UP; GF51-UP)G3516C (S/N: NG61-UP; XL61-UP; RWA1-UP; GSB1-UP; TJB1-UP; GZC1-UP; TJC1-UP; F6D1-UP; NWD1-UP; F6E1-UP; G7E1-UP; F6F1-UP; NWF1-UP; F6M1-UP; DKR1-UP; N6R1-UP; GZZ1-UP)G3516E (S/N: F6G1-UP; NWG1-UP; GAS1-UP; SLY1-UP)G3516H (S/N: H6A1-UP; H6B1-UP; NWH1-UP; NWJ1-UP; GLM1-UP; GLN1-UP)G3520C (S/N: GZA1-UP; HEA1-UP; GDB1-UP; GZB1-UP; HEB1-UP; MAD1-UP; GHE1-UP; GZJ1-UP; GZK1-UP; NWK1-UP; GZL1-UP; NWL1-UP; GZM1-UP; GZN1-UP; B9P1-UP; RLP1-UP; NWR1-UP; LGS1-UP; HAT1-UP; CWW1-UP; JBX1-UP; CWY1-UP; JBZ1-UP)G3520E (S/N: GZE1-UP; GZG1-UP; GZH1-UP; HAL1-UP; GHM1-UP; GHR1-UP; SXY1-UP)G3520H (S/N: GFP1-UP; GFR1-UP; NWX1-UP)Generator SetCG170-16 (S/N: KSJ1-UP)Reference: Refer to Guideline for Reusable Parts and Salvage Operations, SEBF8301, "Inspection and Reuse of Critical Fasteners Used in All Engines" for reuse information for the cylinder head bolts.Problem
Engines are experiencing external oil leaks from the head joint. Leaks are due to inadequate gasket clamp load between the cylinder head and the block.Solution
The bolt torque procedure has been revised to increase the clamp load on the cylinder head gasket to prevent external oil leaks. Use the following procedure to tighten the cylinder head bolts.
Tighten bolts 1 through 8 in the numbered sequence that is pictured in Illustration 1Torque ... 30 5 N m (22 4 lb ft)
Illustration 1 g06198857
(1) Cylinder Head Bolt
Tighten bolts 1 through 8 in the numbered sequence.Torque ... 200 15 N m (148 11 lb ft)
Retighten bolts 1 through 8 again in the numbered sequence.Torque ... 200 15 N m (148 11 lb ft)
Tighten bolts 1 through 8 again to the following rotation.Rotation for bolts ... 180 5 degrees.