If you received it from repair after maintenance of the valves, then the valves and related elements are already in place, and if not, then:
- Install the valve in its original place.
- Install the spring seat, spring seal and top plate.
Valve fittings
1 - saddle; 2 - oil deflector cap; 3 - top plate; 4 - spring.
Install the tool and compress the valve springs so that the valve groove is visible.
Install crackers on the upper groove of the valve and release the springs by releasing the tool.
Siege crackers with a blow of a rubber mallet on the valve plate.
Repeat the above procedure for all other valves. Be sure to install all components in their original places and do not mix them up!
Check the set height of the valve springs using a special ruler or measuring device. If the head was repaired in a workshop, then the set height of the springs must correspond to the required value (however, check it again). The measurement is taken from the top of each spring seat to the bottom of the mount. If the height is not correct, additional washers must be installed.
Be careful, camshafts have a different design, do not confuse.
Identification marks for 8-valve engines
1 - exhaust cam No. 4; 2 - exhaust cam No. 3; A - engines 4G13, 4G15B (early models); B - engines 4G13, 4G13; B - 4G13 engine (version).
Identification marks for 12 valve engines
Distinctive feature (groove A) exhaust camshaft (1) DOHC engines
Distinctive features of the camshafts of a 6-cylinder engine
Lubricate the shaft journals with engine oil and install the shafts.
Correctly position the camshafts in the beds.
4-cylinder engines D0HC
1 - pins.
6-cylinder engines 6А12 (D0HC)
Install bearing caps by numbers and marks.
Install rocker axles.
Tighten the mounting bolts in three steps to a torque of 20 Nm.
Camshaft cover identification marks
1 - label «in front of the engine»; 2 - number of the camshaft cover; 3 - identification symbol (I - intake camshaft; E - exhaust camshaft).
Tightening sequence for the camshaft bearing cap bolts
Check the end play of the camshaft/s.
Install new seals.
Engines without hydraulic tappets: Adjust valve clearances.
Install the cover/s of the cylinder head, having previously covered the spherical places of the cover with a thin layer of sealant.
Install the oil pressure sensor (not all engines).