Skoda Workshop Service and Repair Manuals

Repairing valve gear   Note t  Cylinder heads with cracks between the valve seats or between a valve seat ring and the spark plug thread may continue to be used without any reduction in life provided these are slight initial cracks which are not more than 0.3 mm wide, or cracks exist only at the first 4 turns of the spark plug thread. t  After installing new bucket tappets, the engine must not be started for about 30 minutes (otherwise place the valves on 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. 1 -  100 Nm –  to release and tighten use the counterholder -T30004- 2 -  Camshaft sprocket –  with sensor rotor for the Hall sensor -G40- –  to remove and install, remove toothed belt → Chapter fix installation position by woodruff key -pos. 4- 3 -  Gasket ring –  replace → Chapter 4 -  Woodruff key –  check for firm seating 5 -  20 Nm 6 -  Bearing caps –  Fitting position → Fig. –  Mounting sequence → Chapter –  Lightly coat head contact surface 1 with sealant - AMV 174 004 01 - 7 -  Camshaft –  Inspecting axial play → Fig. –  removing and installing → Chapter –  Slack: max. 0.01 mm –  Identification, timing → Fig. 8 -  Bucket tappets –  do not interchange –  with hydraulic valve clearance compensation –  check → Chapter –  lay aside with contact surface facing down –  before installing check axial play of the camshaft → Fig. –  oil contact surface 9 -  Collets 10 -  Valve spring retainer 11 -  Valve spring –  removing and installing –  with cylinder head removed: with -MP 1-211- and -MP 1-213- with valve supporting plate -MP 1-218 - –  with cylinder head installed: → Chapter 12 -  Valve stem seal –  replace → Chapter 13 -  Valve guide –  check → Chapter –  replace → Chapter –  Repair of the guide with a collar 14 -  Cylinder head –  reworking valve seats → Chapter 15 -  Valve –  do not rework, only grinding in is permissible –  Valve dimensions → Fig.

inspect camshaft, axial play Special tools and workshop equipment required t  Universal dial gauge holder -MP 3-447- t  Dial gauge Wear limit: max. 0.15 mm Perform measurement with the bucket tappets removed and the first and last bearing cap fitted.

Fitting position of the camshaft bearing cap Pay attention to centre displacement. Numbers on the bearing cap must be legible from the front.

Valve dimensions   Note Valves must not be reworked. Only grinding in is permissible.

Dimension		Inlet valve	Outlet valve
Ø a	mm	39,5 ± 0,15	32,9 ± 0,15
Ø b	mm	6,92 ± 0,02	6,92 ± 0,02
c	mm	91,85	91,15
α	∠°	45	45

Camshaft identification, timing Identification t  Base circle of cam: a = Ø 34 mm t  Identification with digits and characters stamped in between the inlet and outlet cams:

Cylinder 1 -arrow I-	E or A
Cylinder 3 -arrow II-	050