General information When working on the cylinder head gasket it is necessary to drain the coolant either partly or completely - see job card B 9-0-4. If the coolant is not drained from the crankcase, a large amount of cooling water will remain in the cylinder heads. This runs into the cylinder liner when the cylinder heads are removed. For correct positioning, the cylinder head must be aligned with the flange face on the charge mixture pipe.
Removing cylinder head Lay out all components in the order of installation. Drain the cooling system - see job card B 9-0-4. Remove charge mixture pipe - see job card W 6-2-7. Remove exhaust pipe - see job card W 6-1-9. Disconnect cable set plug combustion chamber temperature sensor. Remove spark plug.
A1
Unscrew screws (arrows). Remove cylinder head hood and gasket. -
Fit a new cylinder head gasket. Screw guide pins into crankcase.
A 10
Place the cylinder head on the crankcase. Wet cylinder head screws with lubricating oil. Insert and tighten two cylinder head screws diagonally. Do not tighten cylinder head screws yet. The cylinder head screw must be aligned first. Unscrew guide pins. Insert and tighten the other cylinder head screws. Install charge mixture pipe - see job card W 6-2-7. Allign cylinder head with the flange face on the charge mixture pipe. OBJ_DOKU-25815-001.fm
The ball heads must be seated in the ladles of the stop rods (arrows).
A 14
Tighten screws (arrows). Makes sure that the stop rods are not under stress due to valve overlap when fastening the screws, turn over the engine if necessary. Mark the screws with oil-resistant paint after tightening. Checking and adjusting inlet and outlet valve clearance - see job card B 1-1-1.
Clean the sealing surface. Mount cylinder head cover with gasket. -
Position 1.
Tighten screws (arrows). Install spark plug. -
Renew sealing ring.
Install exhaust pipe - see job card W 6-1-9. Connect cable set plug combustion chamber temperature sensor. Fill up cooling system - see job card B 9-0-4.
