Performing work using the Opel KM-565 tool
Removing
1. Use of special tool KM-565 (or an equivalent substitute), valve actuation levers and valve clearance compensators can be removed without first dismantling the camshaft.
2. Apply the parking brake, then jack up the front of the vehicle and place it on jack stands. Remove the right front wheel, if equipped, also remove the crankcase protection.
3. Remove the timing cover (see Removal and installation of a cover of the gas-distributing mechanism).
4. Turn the crankshaft in the normal direction on the pulley bolt until the cam of the first valve, the drive components of which are to be serviced, turns with the working lug up.
5. Fix the tool on top of the timing housing, aligning its tip with the end of the corresponding valve stem. Screw the tool pin into one of the body bolt holes until the valve is recessed enough to allow the valve drive lever to be removed from under the camshaft. Now you can remove the hydraulic compensator and remove the oil seal.
6. Carefully examine the condition of all components (see below Examination), - replace worn or damaged.
Installation
1. Lubricate the valve actuator lever and its gap compensator with clean engine oil and fill the latter into its seat in the cylinder head. Install the valve drive lever in its place, - make sure that its ends are correctly placed on the end of the valve stem and the surface of the hydraulic compensator. Carefully remove the fixture.
2. In the same manner, service the remaining valve actuator components.
Performing work without using the Opel KM-565 tool
Removing
1. The lack of the possibility of using a special tool leads to the need to dismantle the camshaft assembly with the gas distribution mechanism housing in order to provide access to the components to be serviced.
2. After removing the timing case, prepare 8 clean plastic bags or plastic cups, marking them in valve numbering order (you can also use a large box divided into eight separate sections). Remove the valve actuation levers, oil seals and hydraulic compensators one by one and place them in appropriately marked containers.
Installing the valve drive levers in an arbitrary order will lead to a violation of the conformity of the shape and degree of their wear to the wear of the working surfaces of the camshaft cams!
Examination
1. Check the surfaces of the valve drive levers in contact with the cams for signs of wear and mechanical damage - replace the defective levers. In case of defects in the levers, also check the condition of the working surfaces of the corresponding camshaft cams - most likely they will also be damaged or worn out.
2. Check the condition of the oil seals, make the necessary replacements.
3. If there is no certainty in determining the condition of the hydraulic compensators, they should also be replaced - checking the correct functioning of the compensators is not possible.
Installation
1. Lubricate the hydraulic lifters and the walls of their seats with clean engine oil. Install the compensators in their original places.
2. Install valve stem seals.
3. Lubricate the valve drive levers with clean engine oil and install them in their original places, controlling the correct fit on the compensators and valve stems.
4. Finally, reinstall the timing housing with the camshaft embedded in it (see Removal and installation of a head of cylinders).
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