Gasket - cylinder head (page 7 of 9)

23. Remove 3 bolts and remove fuel connector block from cylinder head.
24. Remove gasket, discard 'O' ring and fuel filter.
25. If fitted: Remove spacer block and gasket.

Inspect

1. Thoroughly clean cylinder head mating faces, ensure that EUI drillings, oil and coolant passages are clear and bolt holes are clean and dry.
2. Using suitable solvent, remove all traces of sealant and gasket material.

CAUTION: Do not use metal scrapers.

3. Remove all traces of oil from camshaft bearings and journals.
4. Clean glow plug threads.
5. Check core plugs for signs of leakage and corrosion, seal replacement plugs with Loctite 243.

6. Check cylinder head for warping across centre and from corner to corner: l Maximum cylinder head warp = 0.1 mm (0.004 in)

Cylinder heads must not be refaced. Replace the head assembly if warping exceeds the limit.

7. Check lash adjuster bores for scoring and signs of wear or damage.
8. Check lash adjusters for signs of wear, scoring and overheating, replace as necessary. Ensure oil hole in each lash adjuster is clear. Store lash adjusters upright and in their fitted order.
9. Check finger followers for wear and that rollers are free to rotate. Store finger followers in their fitted order.
10. Check camshaft lobes and bearing journals for signs of scoring and wear.
11. Check bearing surfaces in cylinder head and camshaft carrier for signs of scoring and wear.

Cylinder head and camshaft carrier are machined together as an assembly. If bearing surfaces in either component are damaged, both components must be replaced as an assembly.

12. Check camshaft end-float using following procedures.
13. Position camshaft in camshaft carrier.