Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 2.0 ltr./85 kW Engine, Mechanics | Engine cylinder head, valve gear | Repairing Valve Gear

Replacing valve stem seals

l	Cylinder head fitted

Special tools and workshop equipment required

t	Extractor -MP 1-206-

t	Pressure hose -MP 1-210-

t	Valve lever -MP 1-211-

t	Insertion tool -MP 1-212-

t	Assembly device for valves -MP 1-213 -

t	Spark plug wrench, e.g. - 3122 B-

t	Extractor -T10112 A-

Removing

–	Remove the camshaft → Chapter.

–	Remove bucket tappets (do not interchange) and lay aside with the contact surface facing down.

–	Use the extractor -T10112 A- to unplug the spark plug connectors and unscrew the spark plugs using the spark plug wrench (e.g. -3122 B-).

–	Position piston of the relevant cylinder in bottom dead centre.

–	Insert the assembly device -MP 1-213- and adjust bearing to the stay bolt height.

–	Screw pressure hose -MP 1-210- into the spark plug thread and apply a constant pressure to the cylinder.

at least 0.6 MPa overpressure

–	Remove valve springs with valve lever -MP 1-211 -.

Note

If valve collets are tight, slacken with slight blows of a hammer on the valve lever.

–	Use pulling device -MP 1-206 - to pull off valve stem seals.

Press sleeve -1- down slightly during this step.

Install

–	To avoid damaging the new valve stem seals insert plastic bushing -A- on the valve stem.

–	Insert valve stem seal -B- into the insertion tool -MP 1-212- and carefully push onto the valve guide.

–	Remove plastic sleeve.

Note

t	After installing the camsaft, the engine must not be started for about 30 minutes. The hydraulic clearance compensation elements must settle (otherwise valves would strike the pistons).

t	After carrying out work on the valve gear, carefully crank engine at least 2 revolutions to ensure that no valve touches the piston when the engine is started.

Skoda Workshop Service and Repair Manuals