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articles:m104_head_gasket_replacement [2024/03/12 07:16] – john5788 | articles:m104_head_gasket_replacement [2024/04/26 05:55] (current) – john5788 | ||
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- Reach down between gap and disconnect knock sensor below cylinder 5 | - Reach down between gap and disconnect knock sensor below cylinder 5 | ||
- Remove air intake manifold | - Remove air intake manifold | ||
+ | |||
+ | ===== Remove Cylinder Head ===== | ||
+ | - Remove EGR support bracket | ||
+ | - Loosen hose clamp on coolant hose at back of cylinder head and pull off hose | ||
+ | - Remove cylinder head bolts, starting with bolt #14 on the outside working towards the center | ||
+ | - Lift cylinder head off engine block. Cylinder head weight approximately 80 lb. | ||
+ | |||
+ | |||
+ | ===== Installing Cylinder Head ===== | ||
+ | - Clean mating surfaces and check for flatness. | ||
+ | - 0.004" tolerance between front and rear of engine block / cylinder head mating surface | ||
+ | - Clean cylinder head bolt holes | ||
+ | - Set engine timing to 30 degrees BTDC. | ||
+ | - Pistons are in position such that valves will not interfere when adjusted later | ||
+ | - Install new head gasket | ||
+ | - Install cylinder head | ||
+ | - Torque cylinder head bolts | ||
+ | - Lightly coat threads with engine oil for wet torque | ||
+ | - Follow tightening stages, order, and torque specs | ||
+ | - 1st stage: 55 Nm | ||
+ | - 2nd stage: 90 degrees | ||
+ | - 3rd stage: 90 degrees |