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ENGINE 26 OVERHAUL Camshaft and tappets - inspection 1. Thoroughly clean all components. for signs of wear, pitting, scoring and 3. Support camshaft front and rear bearings on vee blocks, and using a DTI, measure 4. Inspect thrust plate for wear, replace plate if wear is evident. 5. Clean and inspect tappets. Check for an even, circular wear pattern on the camshaft contact 6. Inspect tappet body for excessive wear or scoring. Replace tappet if scoring or deep wear 7. Ensure that tappets rotate freely in their respective bores. 8. Inspect pushrod contact area of tappet, replace tappet if surface is rough or pitted. Camshaft and tappets - refit NOTE: If a replacement camshaft is to be colour coded ORANGE whilst those fitted to 4.6 1. Lubricate camshaft journals with engine oil and carefully insert camshaft into cylinder block. 2. Fit camshaft thrust plate, fit bolts and tighten to 25 Nm (18 lbf.ft). NOTE: If camshaft or thrust plate has been 3. Immerse tappets in engine oil. Before fitting, pump the inner sleeve of tappet several times 4. Lubricate tappet bores with engine oil and fit tappets in removed order. NOTE: Some tappet noise may still be minutes until noise ceases. 5. Fit timing chain and gears. |