Lotus Esprit Connecting Rod, Piston Ring & Liner Specs - Manual Page

This scanned service manual page provides engine bottom-end inspection specifications and rebuild procedures. It covers piston ring checks, giving thickness ranges for the top ring (1.470-1.490 mm) and second ring (1.720-1.740 mm), plus ring gap specifications for the top, second, and oil control rings measured 5 mm down from the liner's top edge. Gudgeon (piston) pin standard diameter is specified as 20.995-21.000 mm. Connecting rod measurements, hand-circled on this scan, include the small end bore (21.007-21.023 mm / 0.8270-0.8277 in) and big end bore with shells fitted and cap bolts tightened (47.788-47.820 mm / 1.881-1.883 in). The page notes that the small end bush can be replaced with a mandrel and press but requires reaming after fitment, with the oil hole aligned at the top. The final section begins the procedure for fitting a piston, liner, and connecting rod assembly: pistons and liners are size-graded 'A' and 'B' and must be matched, and the cylinder liner is fitted with Loctite 572 adhesive/sealant (part number A912E7030V), with liner nip/stand-in specification of 0.08-0.10 mm (0.003-0.004 in). Useful for anyone rebuilding this engine and verifying wear tolerances.