Skoda Workshop Service and Repair Manuals

Replacing valve stem seals For engine with identification characters AWY, BMD (with cylinder head removed) Special tools and workshop equipment required t  Valve lever -MP1-211- t  Valve supporting plate -MP1-218- t  Assembly device for valves -MP1-213- t  Valve stem seal extractor -MP1-230- t  Valve stem seal insertion tool -MP1-233- Conditions l  Cylinder head and camshaft removed l  Components removed (intake manifold, exhaust manifold, spark plugs etc.)   Note Build up pressure with installed cylinder head, see procedure for the engine with identification characters AZQ, BME. Removing

–  Fit cylinder head onto the valve supporting plate.

–  Screw on assembly device for valves -MP1-213-.    Always use cylinder head cover screws (M7) -1- with 4 M8 washers -2-. –  Place the valve lever -MP1-211- on the valve spring and press the valve spring together. –  Remove the safety valve collets.   Note Release safety valve collets that are tight by striking with light blows of a hammer on the valve lever.

–  Pull off valve stem seal with extractor for valve stem seal -MP1-230-.    Press sleeve -1- down slightly during this step. Install

–  In order to avoid damage to the new valve stem seals, fit the supplied plastic sleeve -A- onto the valve stem. –  Oil valve stem seal -B-, insert into the valve stem seal insertion tool -MP1-233- and carefully push onto the valve guide. –  Remove plastic sleeve. Further installation occurs in reverse order. For engine with identification characters AZQ, BME (with cylinder head installed) Special tools and workshop equipment required t  Supporting device -MP9-200- t  Spark plug wrench, e.g. -3122 B- t  Blank holder for valve spring -MP1-229- with pressure plate -MP1-229/1- t  Extractor for valve stem seal -MP1-230- t  Valve stem seal insertion tool -MP1-233- t  Pressure pad -T30004- with replaceable bolt -T30004/1- t  Counterholder -MP1-216- t  Pressure hose -MP1-210- t  Extractor -T10094A-   Note Use valve supporting plate -MP1-218- with cylinder head removed, see procedure for engine with identification characters AWY, BMD. Removing –  Remove V-ribbed belt → Chapter. –  Remove cylinder head cover → Chapter. –  Unscrew the spark plugs with spark plug wrench -3122 B-. –  Remove roller rocker arm and place on a clean surface. Make sure that you do not mix up the roller rocker arms. –  Position piston of the relevant cylinder in bottom dead centre.

–  Screw on blank holder for valve spring -MP1-229- with the pressure plate -MP1-229/1- –  Screw the pressure hose -MP1-210- in the spark plug thread. –  Connect pressure hose to compressed air with min. 0.6 MPa (6 bar) pressure and remove the valve springs with blank holder for valve spring -MP1-229-. –  Pull off valve stem seals with extractor for valve stem seal -MP1-230-. Install –  Insert the supplied plastic bushings on the relevant valve stem. This will prevent any damage to the new valve stem seals.

–  Insert the new valve stem seal -B- in the insertion tool for valve stem seal -MP1-233-. –  Oil the sealing lip of the valve stem seal and carefully slide onto the valve guide -A-. Further installation occurs in reverse order. Install cylinder head cover → Chapter. Installing the camshaft sprockets, setting the timing → Chapter.