Lotus Esprit Camshaft Journal & Cam Bearing Specs - Service Manual Page

This document is a scanned page (page 498 of 1899) from a Lotus Esprit service manual PDF, covering camshaft inspection and measurement procedures. Step 9 describes securing the cam pulley in a soft-jaw vice before removing the pulley bolt, clamping washer, and camshaft, and discarding the front oil seal. Step 10 gives inspection criteria and new-size tolerances: camshaft journal diameter 27.939-27.960 mm (1.0956-1.1008 in), cam lobe major axis of 46.00 mm (1.811 in) for inlet and 45.15 mm (1.778 in) for exhaust, and thrust face distance 25.000-25.052 mm (0.9843-0.9863 in). A labeled diagram (ref e134) identifies the thrust face width, journal diameter, and cam lobe major axis. Step 11 covers examining the cam bearing surfaces in the cylinder head and cam caps, torquing the cam caps to 8 Nm (6 lbf.ft), and measuring cam bearing diameter to a new-size tolerance of 28.000-28.021 mm (1.1024-1.1032 in); the cylinder head must be replaced if bearings are unserviceable. An annotation calculates oil clearance: bearing bore (1.1024-1.1032") minus journal (1.0956-1.1008") yields an oil clearance noted as .0068" - 0.0024". The page ends at a 'Camshaft Refitment' heading.