Cylinder Head Overview

Fig 1: Cylinder Head Overview

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1. Cylinder Head Gasket
   • Replacing, refer to CYLINDER HEAD .
   • Installation position: Part Number, points to cylinder head
   • After replacing, change coolant and engine oil
2. Cylinder Head
   • Removal and installation, refer to CYLINDER HEAD 
   • Check for distortion, refer to Fig 5
   • Reworking dimension, refer to Fig 6
   • After replacing, change coolant and engine oil
3. Cylinder Head Cover Gasket
   • Replace if damaged or leaking
4. Cylinder Head Cover
   • Removal and installation, refer to LEFT CYLINDER HEAD COVER , RIGHT CYLINDER HEAD COVER 
5. Gasket
   • For cap
   • Replace if damaged or leaking
6. Cap
7. Ignition Coil
   • Remove with Ignition Coil PullerT40039
8. Bolt
   • Replace if seal is damaged
   • Tightening specifications and sequence, refer to: Left cylinder head cover Fig 2, right cylinder head cover Fig 3
9. Camshaft Adjustment Valve 2 -N208-
10. Bolt
    • 2.4 Nm
11. O-ring
    • Replace
12. Seal
    • Replace
13. Locking Bolt
    • 35 Nm
14. Bolt
    • 2.4 Nm
15. Camshaft Adjustment Valve 2 (exhaust) -N319-
16. O-ring
    • Replace
17. Cylinder Head Bolt
    • Replace
    • Observe sequence for loosening Removing .
    • Tightening specification and sequence, refer to Fig 4

Fig 2: Identifying Left Cylinder Head Cover Bolts Tightening Sequence

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-- Tighten bolts to 9 Nm in the sequence -1 to 15-.

Fig 3: Identifying Right Cylinder Head Cover Bolts Tightening Sequence

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-- Tighten bolts to 9 Nm in the sequence -1 to 16-.

Fig 4: Cylinder Head Bolts Tightening Sequence

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-- Tighten bolts in 5 stages in -1 to 5- sequence as follows:

-- Install bolts by hand as far as stop.

-- Tighten to 30 Nm.

-- Tighten to 60 Nm.

-- Tighten an additional 90°.

-- Tighten an additional 90°.

-- Insert bolts -arrows- with locking compound and tighten to 8 Nm; Locking compound.

-- Tighten the bolts -arrows- an additional 90°.

Fig 5: Checking Cylinder Head For Distortion

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-- Check cylinder head at multiple points for distortion, using straight edge and feeler gauges.

• Max. permissible distortion: 0.1 mm.

Fig 6: Cylinder Head Refacing Dimension

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Resurfacing cylinder head (face grinding) is only permissible to minimum dimension -a-.

• Minimum dimension: -a- = 139.5 mm.