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Note Cylinder heads with cracks between the valve seats may be used without reducing engine life, provided the cracks are small and not more than 0.5 mm wide. Assembly overview - valve gear ⇒ page 74 . Checking valve guides ⇒ page 76 . Renewing valve stem seals ⇒ page 78 . Removing and installing camshaft ⇒ page 80 Removing and installing camshaft seal ⇒ page 84 2.1 Assembly overview - valve gear 1 - 20 Nm + 1 /4 turn (90°) fur‐ ther ❑ Renew loosening and tighten‐ ing ⇒ page 80 , Re‐ moving and installing camshaft. 2 - Rocker arm shaft ❑ Do not interchange. 3 - Cylinder head bolt ❑ Renew loosening and tighten‐ ing ⇒ page 67 , Remov‐ ing and installing cylin‐ der head. ❑ Before installing, insert washers ⇒ Item 4 (page 74) in cylinder head. 4 - Washer ❑ For cylinder head bolts. before installing bearing caps 5 - Bucket tappet ❑ Do not interchange. clearance compensa‐ tion. ❑ Store with cam contact surface downwards ❑ Before installing, check camshaft axial clearance ⇒ page 76 . ❑ Oil contact surfaces. 4-cylinder diesel engine (1.9 l engine) - Edition 01.2009 74 Rep. Gr.15 - Cylinder head, valve gear
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