Removing
Separate the gearbox and engine.
Secure the engine to the engine and transmission bracket.
Remove the following parts:
- intake manifold;
- the lower part of the intake manifold;
- an exhaust manifold.
Remove the thermostat housing from the cylinder head.
Remove the EGR valve.
Remove the timing cover.
Remove the camshaft housing.
Remove the roller arms together with the supports and place them on a clean surface.
Roller levers and bearings must not be interchanged.
Pic. 2.42. The procedure for loosening the cylinder head bolts
Loosen and remove the cylinder head bolts in sequence (pic. 2.42).
Carefully remove the cylinder head.
Installation
Put a clean rag into the cylinders so that dirt and emery residue do not get between the cylinder mirrors and the pistons.
Note: Pistons must not be at TDC.
Note: A new cylinder head gasket should not be removed from the packaging until immediately before installation.
Note: Handle the new gasket with extreme care. Its damage will lead to leaks in the future.
Carefully clean the seating surfaces of the cylinder head and cylinder block. Do not leave long scratches or burrs (when using sanding paper, its grit must be at least 100).
Carefully remove the remnants of emery and sanding paper, as well as rags from the cylinders.
Bring the piston of the first cylinder to TDC and again slightly turn the crankshaft back.
Install a new cylinder head gasket. Marking (part number) should read well.
Install the cylinder head. Pay attention to the alignment pins in the cylinder block.
Insert new head bolts and tighten by hand.
Pic. 2.43. The order of tightening the cylinder head bolts
Tighten the cylinder head bolts in sequence as follows (pic. 2.43).
Tighten all bolts to 30 Nm.
Then tighten all bolts 1/4 turn. (90°) ordinary key.
Finally, tighten all the bolts again by 1/4 turn. (90°).
Insert the support elements into the cylinder head and install the appropriate roller arms on the ends of the valve stems and their supports.
Install the camshaft housing.
Adjust the valve timing.
Further installation is carried out in the reverse order. In doing so, the following must be taken into account
Install the timing cover.
Connect fuel lines.
Install the EGR valve.
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