Pic. 3.4–62. Valve mechanism: 1 - valve; 2 – a head of the block of cylinders; 3 - pressure limiting valve 2.7 bar, 25 Nm; 4 - oil deflector cap; 5 - valve spring; 6 - valve spring plate; 7 - crackers; 8 - lever support; 9 - sealing ring; 10 – a forward cover of the bearing of a camshaft of inlet valves; 11 - cap nut, 15 Nm; 12 - bearing cover; 13 - bolt, 10 Nm; 14 - nut, 10 Nm; 15 - cap nut, 15 Nm; 16 – a back cover of the bearing of a camshaft of final valves; 17 - intake camshaft; 18 - exhaust camshaft; 19 - lever; 20 – hydraulic pusher; 21 - persistent half rings
Before installation, it is necessary to lubricate the working surfaces of the hydraulic pushers 20 (pic. 3.4–62) engine oil.
Withdrawal
Before disconnecting the battery, find out if you have a radio activation code.
Turn off the ignition and disconnect the wire «masses» from the battery.
Remove the cylinder head cover.
Remove the toothed belt from the camshaft pulleys.
Pic. 3.4–55. Arrangement of bolts of fastening of a directing roller and a back casing of a gear belt
Unscrew bolts and remove back casings of a gear belt (see fig. 3.4–55, 3.4–58).
Pic. 3.4–58. Arrangement of bolts of fastening of a back casing of a gear belt
Unscrew the front and rear intake camshaft bearing caps (see fig. 3.4–62).
Pic. 3.4–63. Arrangement of nuts and bolts of fastening of covers of bearings of camshafts
Unscrew bearing caps 0, 3, 4, 7 and 8 camshafts (pic. 3.4–63).
Gradually unscrew bearing caps 2 and 6 crosswise and remove the exhaust camshaft.
Gradually unscrew bearing caps 1 and 5 crosswise and remove the intake camshaft.
Installation
Make sure the crankshaft is fixed with set screw 3242.
Unscrew the stud located at the end of the camshaft from the cylinder head.
Make sure the thrust washers are in place.
Check the condition and position of the rocker arms and hydraulic tappets.
Pic. 3.4–64. Using Tool 3458 to Correctly Install Camshafts
Install the intake camshaft in place so that tool 3458 can be installed in the end of the shaft (pic. 3.4–64).
Fit bearing caps 1 and 5 and secure with bolts.
Install bearing caps 2 and 6 and secure with bolts.
Install bearing caps 0, 3, 4, 7, 8 and secure with bolts.
Recheck the position of the rocker arms and hydraulic tappets.
Clean the mating surfaces on the cylinder head and outer camshaft covers.
Pic. 3.4–65. Location of the sealant layer on the right inner back cover
Apply a thin layer of sealant to the mating surface of the right inner rear cover (pic. 3.4–65).
Pic. 3.4–66. The location of the sealant layer on the outer rear or front right cover.
Apply a light coat of sealant to the mating surface of the outer rear or front right cover (see fig. 3.4–66).
Install the outer covers.
Further installation is carried out in the reverse order of removal.
Install the cylinder head cover.
Install the toothed belt.
Wait 30 minutes before starting the engine: the hydraulic tappets must return to normal, otherwise the pistons may hit the valves.
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