72 ENGINE 273 MPFI Selection of Shims Step 1: Put master shims of thickness 3 mm on all 4 valve retainers. Put tappet and cam shaft over it. Step 2: Rotate the cam shaft and bring it to TDC position. Then measure the clearance between tappet and cam shaft lobe for inlet valve with the help of feeler gauge. Note down the clearance. Step 3: Remove the TDC plate and again rotate the camshaft and bring it to TDC position. Measure the clearance between tappet and cam shaft lobe for exhaust valve with the help of feeler gauge. Note down the clearance. Calculation For Shim Use the following formulae for selection of shim. For inlet valve: S = M + (C - 0.15) For exhaust valve: S = M + (C - 0.25) S = Required Shim Thickness M = Thickness of Master Shim i.e. 3 mm C = Valve Clearance measured with the feeler gauge when master shim is placed on valve retainer. Step 4: Remove the master shim from retainer. Select proper shim as per calculation from shim box. Select the shim size from the available sizes. Shim size available from 2.5 mm thick to 3.9 mm thick at the intervals of 0.050 mm and 2.525 mm thick to 3.875 mm thick at the intervals of 0.050 mm. Put the shims of required thickness in respective places. Put tappet and camshaft over it. Again measure the clearance between tappet and camshaft lobe and ensure specified valve clearance. • To access upper mounting bolt of the alternator, remove rear shelf / Lift the vehicle on two post lift. • Loosen upper bolt of the alternator i.e. belt-tension adjusting bolt. • Remove V-belt from damper pulley. • Remove the belt from alternator pulley. ALTERNATORBELT REMOVALANDREFITMENT PROCEDURE Removal Procedure • Remove negative terminal of battery . PRECAUTION Ensure that the removed terminal is away from the battery negative post. • Position the car on a two post lift. • Loosen lower mounting bolt of alternator. • Check the condition of belt. Replace if wear down or any cut is found.
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