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Replace All Valve Stem Seals (Cylinder Head Installed) Opel Astra H

DOHC Petrol Engine 4 illustrations ~409 words

Remove

  1. 1. Remove camshafts
  2. 2. Pull hydraulic valve lifters out of cylinder head with KM-845

Note. Put hydraulic valve lifters aside in sequence so that hydraulic valve lifters can be assigned to valves when they are installed again

  1. 3. Clean all removed parts
  2. 4. Position crankshaft at TDC-marking (1)
  1. 5. Special tools required from device for pressing down valve springs: MKM-6086 • Assembly head MKM-6086-100-1 • Thrust piece MKM-6086-100-11 • Assembly shaft MKM-6086-4 • Support MKM-6086-6 • Lever arm MKM-6086-7 • Joint MKM-6086-8 • Removal head MKM-6086-11 • Pliers MKM-6086-14 • Compressed air adapter MKM-6086-15
  2. 6. Install compressed air adapter (1) in spark plug bore of the first cylinder
  3. 7. Apply compressed air to cylinder
  4. 8. Fasten lever arm (3) to joint (4)
  5. 9. Attach support (5) with assembly shaft (6) and joint (4) to cylinder head

Note. Assembly shaft must sit centrally over the spark plug bores

  1. 10. Attach removal head (2) to lever arm
  1. 11. Place removal head vertically on valve spring collar
  2. 12. Press valve spring down
  3. 13. Remove valve cotters with MKM-6086-14

Important. Do not use magnetic tool to remove valve cotters

  1. 14. Remove valve spring collar and valve spring

Note. Lay aside the components in their installation position to prevent them being installed in the wrong order

  1. 15. Remove valve stem seals with KM-840

Install

  1. 16. Coat valve stem lightly with engine oil
  2. 17. Place new valve stem seal (1) onto valve guide with KM-835-A
  3. 18. Carefully drive in valve stem seal to end position by gently tapping
  4. 19. Insert valve spring and valve spring collar in the same installation position as previously
  5. 20. Insert thrust piece (3) in assembly head (4)
  6. 21. Push locking ring (5) backwards
  7. 22. Insert valve cotters (2) into assembly head
  8. 23. Fix valve cotters in position by pushing the locking ring forwards
  9. 24. Attach assembly head to lever arm
  10. 25. Place assembly head vertically on valve spring collar

Important. Do not make 2nd attempt without checking that both valve cotters are seated in the assembly head

  1. 26. Allow valve cotters to engage by pressing the assembly head down in the valve grooves

Note. ensure that valve cotters are correctly seated

  1. 27. Proceed in the same way for all the other valves
  2. 28. Detach device for holding down valves from cylinder head
  3. 29. Coat hydraulic valve lifters with engine oil and insert into cylinder head in correct sequence.
  4. 30. Install camshafts

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