Valve Clearance: Notes

With camshaft covers removed, rotate camshafts and record clearance between heel of each cam lobe and its respective tappet. If adjustment is necessary, rotate cam shaft and align with valve timing gauge (C 3993) before removing final camshaft retaining nut. Disconnect sprockets from camshafts.
NOTE: DO NOT rotate engine while camshaft sprockets are disconnected.
Remove camshaft bearing caps and lift off camshaft. Remove each tappet that required adjustment and note its location for reassembly in its original position. Remove adjusting pad and measure thickness.
Use measured pad thickness and difference between measured valve clearance and specified clearance to calculate required thickness of new adjusting pad. Adjusting pads are available in increments of.001" (.03 mm) from.085" (2.16 mm) to.110" (2.79 mm) and are marked with letters from "A" to "Z", respectively.

Fig 1: Position of Valve Timing Gauge
Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

Insert correct adjusting pads and install tappets. Install camshafts and align with timing gauge. Torque camshaft bearing cap nuts to 9 ft. lbs. (12.2 N.m). Connect camshaft sprockets and install camshaft covers.

VALVE CLEARANCE SPECIFICATIONS

Application

⁽¹⁾ Clearance In. (mm)

Intake & Exhaust

.012-.014 (.30-.35)

⁽¹⁾	Clearance measured with engine cold.