Vauxhall Workshop Service and Repair Manuals

Remove and install both camshafts (Z 12 XE, Z 12 XEP, Z 14 XEP, with air conditioning, LHD)

  Remove

2.   Remove air cleaner housing (1) •   Disconnect 2 wiring harness plugs – Hot film mass air flow sensor (3), tank vent valve (2) •   Unclip tank vent valve •   Remove suction pipe (4) – Unscrew 2 nuts – Detach engine vent hose (5) •   For Z 12 XEP, Z 14 XEP: detach air intake hose – Release clamp •   Remove bolt (arrow)

3.   Disconnect 4 cable management wiring harness plugs •   Oil pressure switch (2), coolant temperature sensor (3), camshaft sensor (4) and ignition module (1) •   Unclip wiring trough (5) •   Set wiring harness to one side

4.   Remove ignition module •   Remove ignition module cover – Move to the right •   Unscrew 2 bolts •   Extract using KM-6009 (1) Note:   Do not tilt 5.   Remove cylinder head cover •   Detach 2 engine vent hoses •   Unclip coolant hose •   Unscrew 13x bolt 6.   Raise vehicle

7.   Remove ribbed V-belt cover •   Unscrew 3 bolts (1) •   Remove clip (arrow)

8.   Unscrew crankshaft bearing bridge closure bolt (1) 9.   Set no.1 cylinder to TDC •   Insert KM-952 (2) •   Turn crankshaft uniformly until KM-952 engages – Mark on crankshaft belt pulley (4) must line up with lug (3) on timing case

10.   Insert KM-953 •   KM-953 must engage in camshaft groove •   Remove KM-953

11.   Lock chain tensioner •   Unscrew closure bolt (1) •   Load intake camshaft in direction of arrow via hexagonal section using an open-ended spanner •   Insert KM-955-1 (2)

12.   Remove sliding rail (1) •   Unscrew 2 bolts 13.   Detach camshaft sprockets •   Unscrew 2 bolts (2) – Counterhold camshafts at hexagonal section (3) •   Remove phase sensor disc

14.   Remove exhaust camshaft •   Remove camshaft bearing cap – Note identification •   Release camshaft bearing cap working in inward spiral from outside in steps of 1/2 to 1 turn – Camshaft must be evenly released from the bearing seats 15.   Remove intake camshaft •   Remove camshaft bearing cap – Note identification •   Release camshaft bearing cap working in inward spiral from outside in steps of 1/2 to 1 turn – Camshaft must be evenly released from the bearing seats

  Install

16.   Inspect components Note:   If cylinder head is to be checked and overhauled : Remove all outer attaching parts from cylinder head. •   Camshafts, cylinder head 17.   Install intake camshaft •   Coat sliding surfaces with MoS2 lubricating paste •   Insert camshaft, camshaft bearing cap – Observe installation position and allocations •   Install camshaft bearing cap – Tighten 8 camshaft bearing cap bolts 8 Nm Note:   Tighten in stages in a spiral from inside to outside 18.   Install exhaust camshaft •   Coat sliding surfaces with MoS2 lubricating paste •   Insert camshaft, camshaft bearing cap – Observe installation position and allocations •   Install camshaft bearing cap – Tighten 8 camshaft bearing cap bolts 8 Nm Note:   Tighten in stages in a spiral from inside to outside

19.   Adjust camshafts •   Insert KM-953 (1) – "Turn" the camshafts at hexagonal section (arrows)

20.   Attach camshaft sprockets •   Renew bolts •   Attach intake camshaft sprocket with phase sensor disc (2) – Bolt in bolt Note:   It must be possible to rotate phase sensor disk by hand •   Attach exhaust camshaft sprocket – Bolt in bolt 21.   Attach sliding rail •   Tighten bolt 8 Nm 22.   Remove KM-955-1 •   Replace seal ring •   Tighten chain tensioner closure bolt 50 Nm 23.   Attach KM-954 •   Rotate phase sensor disk (2) until KM-954 (1) can be attached to timing case

24.   Fasten camshaft sprockets Note:   Tightening torque of 10 Nm is used to secure the camshaft sprockets and the phase sensor disk •   Tighten 2 bolts (2) 10 Nm Note:   First tighten intake camshaft sprocket bolt – Counterhold camshafts at hexagonal section (1) 25.   Remove retaining tools •   KM-952 , KM-953 , KM-954 Note:   Retaining tools must not be used for counterholding 26.   Fasten camshaft sprockets Note:   Second person required •   Tighten 2 bolts 50 Nm + 60° Note:   First tighten intake camshaft sprocket bolt – Counterhold camshafts at hexagonal section

32.   Attach cylinder head cover (1) •   Renew gasket (2) and seal rings •   Apply sealant (dimension I = 2 mm) Note:   Complete assembly operations within 10 minutes •   Tighten 13 bolts 8 Nm 33.   Attach 2 engine vent hoses 34.   Attach ignition module •   Unscrew 2 KM-6009 •   Tighten 2 bolts 8 Nm •   Attach ignition module cover 35.   Install engine management wiring harness •   Route wiring harness •   Clip-in wiring trough •   Connect 4 wiring harness plugs