2. If the valve service head has been sent to the workshop, the valves will already be installed. Start the assembly procedure from point 1.
3. Starting at either end of the head, install the first valve by lubricating its stem with molybdenum disulphide grease or engine oil.
4. Lubricate the shoulder of the oil seal, carefully put it on the end of the valve,..
...then slide it along the rod to the guide. Using a hammer and a long socket or slinger cap installer, carefully tap the cap until it is fully seated on the guide. Do not bend or twist the cap during installation, otherwise it will not seat properly against the valve stem.
On some engines, the intake and exhaust valve seals are different - do not confuse them.
5. Install the spring seat or washer on the guide (washers), and then the spring and spring retainer.
6. Compress the spring with the compressor and carefully install the cotters into the groove, then carefully release the compressor and make sure the cotters are installed correctly.
If necessary, apply a small amount of lubricant to each cracker to keep them in place.
7. Repeat steps 3 - 6 for each valve. Make sure the components are in the right place - don't mix them up!
M10, M20 and M30 engines
1. Install in the reverse order of disassembly, rocker arms and shafts. Make sure the shafts are installed in the correct position. Flat guide cuts and small lubrication holes must face inwards; large lubrication holes - down, towards the valve guides.
2. Lubricate with engine assembly paste or molybdenum disulfide grease the necks and camshaft cams, then carefully insert it into the cylinder head, turning so that the cams bypass the rocker arms. In addition, it will be necessary to compress the valve springs through the rocker arms, as described in Section Disassembly of the cylinder head, so that the cams pass under the rocker arms. Be very careful not to scratch or dent the surfaces of the camshaft bearings in the cylinder head.
M40 engines
1. Lubricate the wells of the hydraulic lifters in the cylinder head, then install them in their places.
2. Install thrust discs on the valves, and pushers on the valves and hydraulic pusher rods, keeping their original location.
3. Grease in a head of cylinders of a surface of bearings of a camshaft.
4. Install the camshaft in the cylinder head so that both valves of cylinder No. 1 are open and the valves of cylinder No. 4 are in the switching state (exhaust closes, intake opens). Cylinder #1 is located on the timing belt side.
5. Lubricate the surfaces of the bearing caps, then install them in the correct position and insert the mounting bolts. Tighten the bolts in stages to the required torque.
6. Install a new oil seal in the front camshaft bearing cap (see Part Repair work carried out without removing the engine from the car).
All engines
1. Install an oil supply pipe with new seals in the upper part of the cylinder head, then tighten the bolts to the required force.
2. Cylinder head ready for installation (see Part Repair work carried out without removing the engine from the car).