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Disassembly and assembly of the cylinder head

Details of the engine block M 102

1 - the block of cylinders 2 - the holder of crankshaft rear oil seal 3 - timing cover 4 - the oil sump 5 - crankshaft front oil seal 6 - crankshaft rear oil seal 7 - oil pan gasket	8 - a cover of the radical bearing 9 - centering pin 10 - a stopper 11 - plug 12 - the index to set the ignition timing 13 - the fuel pump 14 - the adjusting pin

Dismantling the cylinder head 4-cylinder engine

1 - cylinder head 2 - the camshaft bearing housing 3 - Oil pipe 4 - cylinder head gasket 5 - head cover 6 - slinger	7 - the cylinder head cover gasket 8 - Valve Guides 9 - valve seat 10 - plug 11 - a stopper

Dismantling

Dismantling the cylinder head 4-cylinder engine 1 - the valve stem seal 2 - a plate of the valve spring

Removal of crackers valves per cylinder head 4-cylinder engine

PERFORMANCE ORDER

Remove the cylinder head. Remove the exhaust manifold gasket. On engines with fuel injection, remove the intake manifold with flow meter of air and fuel metering assembly. On engines with hydraulic valve lifters gradually loosen the bolts of the camshaft bearing housings. Remove the plate pushers and mark the tappets and their nests. Remove the camshaft bearings of cylinder head. Release valves on crackers, compressing the spring valves special tool. On the engine with adjustable valve clearance as much as possible, remove the adjusting screws. Gradually loosen the bolts bearing the rocker arm shaft. Remove the plate spring, remove the valve and check its position in the cylinder head. Remove the valve stem cap from the valve guide. Remove the thrust washer spring. Check the condition of the valves, seats and valve guides, as well as the gap between the guide sleeve and valve stems. Clean the cylinder head and the removed parts. On engines with hydraulic valve lifters check lubrication channels rocker axes (the state of the ball check valve). Resolve the identified problem (see the dimensions. In subsection Design and specifications - Cooling System). After grinding or reprocessing thoroughly clean the seat and the cylinder head channels. Remove the bolts attaching the stand with the axis of the rocker and remove the M8 bolt rocker arm shaft. Check the status of the axis of the rocker and lubrication channels.

Assembly

The cross section of the cylinder head engines M 102 with a hydraulic compensation of thermal backlashes in a drive of valves

Location of valves on the engine M 102 SAT - exhaust valves VP - inlet valves

PERFORMANCE ORDER

Fit the valve guides on the new valve stem seals. Insert the valves in the guides, set the spring plate and spring. Compressing the spring special tool, install the valve crackers. On engines with hydraulic tappets set the plate pushers. Assemble the rack axis with rocker arms and rocker arm axles, ensuring coincidence channel axes with holes bolts. Place the camshaft bearings in the cylinder head and install the rack axes rocker arm in its place. Screw bolts of the camshaft bearing housings and gradually tighten them to the specified torque (see. In subsection Design and specifications - Cooling System). Turn the camshaft in a position corresponding to the first phase of combustion in the cylinder (valves must be closed and the mark on the camshaft to be against the edge of the cylinder head). Install the intake manifold and exhaust manifold. In the future, the assembly is performed in reverse order. Install the cylinder head.