Skoda Workshop Service and Repair Manuals

Removing and installing camshafts Special tools and workshop equipment required t  Counterholder -T10051- t  Extractor -T10052- t  Camshaft-insertion tool -T40094- t  Camshaft-insertion tool -T40095- t  Tensioning tool -T40096/1- t  Silicone sealant -D 176 501 A1- t  Sealant remover gasket stripper (bearing code GST, bearing article no. R 34402), manufacturer Retech s.r.o. t  Cleaning and degreasing agent, e.g. -D 009 401 04- t  Protective goggles and gloves Removing l  Cylinder head fitted. –  Detach the toothed belt from the camshaft sprocket and from the toothed belt gear at the high pressure pump: t  Fabia II, Roomster, Rapid → Chapter. t  Octavia II, Superb II, Yeti → Chapter. –  Remove cylinder head cover: t  Fabia II, Roomster, Rapid → Chapter. t  Octavia II, Superb II, Yeti → Chapter. –  Remove camshaft sprocket.

–  Slacken screw -1- for the hub of the camshaft, to do so counterhold with counterholder -T10051-. –  Release screw by about 2 turns.

–  Position the extractor -T10052- at the hub of the camshaft and screw the screws -1- into the hub. –  Screw in the screw -2- for removing the hub of the camshaft and counterhold on the hexagon (with open-end wrench SW 30) of the extractor. –  Remove hub from cone of camshaft. –  Remove vacuum pump → Chapter.

–  Release the bearing frame screws in the order -24...1-. –  Unscrew the screws and carefully loosen the bearing frame from the bonding. –  Mark the camshafts for reinstalling and remove. Install   WARNING Wear protective gloves and goggles when working with gasket remover and degreasing agent! –  Remove residual sealant on the bearing frame and cylinder head using a chemical sealant remover. –  Clean sealing surfaces, they must be free of oil and grease. –  Oil contact surfaces of camshafts.   Caution The camshafts must only be installed using the camshaft-insertion tool -T40094- as described in the following, otherwise the axial bearing in the bearing frame can be destroyed and the cylinder head must be replaced.

Set up the camshaft-insertion tool -T40094- as follows: –  Tighten the supports -T40094/9- and -T40094/10- (with -T40094/11-) to the base plate as shown in the illustration. It may be necessary to remove the bolted supports in this location.

–  Position the support -T40094/1- onto the plug location -F- and the support -T40094/2- onto the plug location -A-. –  Insert the inlet camshaft in the supports -T40094/1- and -T40094/2-.

–  The protrusion -arrow- of the cylinder head bolt must point to the outside. –  Fit on a feeler gauge of 0.50 mm in order to balance out any play and slide the support -T40094/8- into the groove of the inlet camshaft.

–  Insert the outlet camshaft in the supports -T40094/9- and -T40094/11-. –  Interlock the outlet camshaft with the cover -T40094/11-. l  The peg -1- of the cover must engage in the groove -2- in the camshaft.   Note The tensioning gear at the exhaust camshaft is no longer present as of 02.2010. Engines with tensioning gear –  Position the tensioning tool -T40096/1- on the serration of the outlet camshaft in such a way that each leg of the tensioning tool engages into each one half-pinion. l  The wider leg must engage in the wider half-pinion. –  Tension the tensioning tool with the knurled wheel until the tooth flanks are flush with each other. Continued for all engines –  Slide the inlet camshaft to the outlet camshaft until the serrations are in mesh -arrows-.

–  Position the bearing frame -1- onto the camshafts. l  All of the camshaft bearings must rest on the camshafts. –  Position the camshaft-insertion tool -T40095- and fix the camshafts in the bearing frame as shown in the illustration. –  Remove the cover -T40094/11- and slide the support -T40094/8- out of the groove of the inlet camshaft.   Note

Pay attention to the use by date on sealant. –  Cut off nozzle tube at the front marking (Ø of nozzle approx. 2 mm).   Caution Risk of contamination of the camshaft bearings through excess sealant. Do not apply thicker sealant beads than indicated.

–  Apply sealant beads onto the clean sealing surfaces of the cylinder head as shown in the illustration. l  Thickness of sealant beads: 2…3 mm.   Note The bearing frame must be installed within 5 minutes after applying the silicone sealant. –  Remove the camshafts together with the bearing frame, the camshaft-insertion tool -T40095- and the tensioning tool -T40096/1- from the camshaft-insertion tool -T40094- and carefully fit into the cylinder head.

–  First of all tighten the screws and the nuts for the bearing frame in the sequence -1°...°24- by hand. l  The bearing frame must rest on the cylinder head with its complete contact surface. –  First of all tighten the screws and the nuts for the bearing frame in the sequence -1°...°24- by hand.    Tightening torque: 10 Nm. –  Remove the camshaft-insertion tool -T40095- and the tensioning tool -T40096/1-. Further installation occurs in reverse order, while paying attention to the following: –  Install camshaft seal → Chapter. –  Drive in new screw cap → Chapter. –  Install vacuum pump → Chapter. –  Install cylinder head cover: t  Fabia II, Roomster, Rapid → Chapter. t  Octavia II, Superb II, Yeti → Chapter.   Note t  After installing the camshafts, the engine must not be cranked or started for about 30 minutes. The hydraulic clearance compensation elements must settle (otherwise the 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.