| t
| 7 mm reamer -3120- and cutting fluid |
| –
| Clean and check cylinder head. Cylinder heads in which the valve seats can no longer be reworked (observe minimum dimension → Chapter), or cylinder heads which have already been machined to the minimum dimension ( → Fig.), should not have the valve guides renewed. |
| –
| Press out worn valve guides with drift -3121- from camshaft side (repair version with shoulder - from combustion chamber side). |
| –
| Using drift -3121-, press in new, oil coated guides from camshaft side to shoulder in cold cylinder head . |
Note | When the shoulder on guide makes contact, the pressure must not exceed 10 kN (approx. 1.0 t) otherwise shoulder may break off. |
| –
| Ream valve guide with 7 mm reamer -3120-. Use plenty of cutting fluid. |
|
|
|
