Lotus Esprit Series - Cylinder Head; Valves

TECHNICAL DATA
'age 4
CYLINDER HEAD
Material Aluminium alloy
Gasket Steel asbestos DV
Head depth
82.04+ .254 mm (3.23 + .O1 ins)
- -
Combustion chamber depth
12.192/12.573 mm (0.480/0.495 ins)
Max.
permissible metal removal Nil
(To correct warping)
Valve Timing
Inlet opens
Inlet closes
Exhaust opens
Exhaust closes
European Spec. North American Spec.
30°B.T.D.C. 26OB.T.D.C.
Valve M .O .P. (Maximum openinn noin?!
, European Spec. Inlet ~O~.~~A.T.D.C.
Exhaust 102.5' B . T . D . C .
North American Spec.
. ..
.,: Inlet ~OO~A.T.D.C.
Exhaust lloOB.T.D.C.
Angle of valve seats 45O
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-. -.
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VALVES ,j_ . ..
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Head diameter -,;,inlet
35.56 mm (1.40 ins)
- exhaust
. ,.
30.86 mm (1.215 ins)
Stem diameter
- inlet/exhaust 7.137 mm (0.281 ins)
Stem clearance in guide
- inlet
0.0076/0.0457 mm (0.0003/0.00 18 ins)
- exhaust
0.0076/0.0584 mm (0.0003/0.0023 ins)
Valve clearance (cold)
- inlet 0.127/0.178 mm, 0.005-0.007 ins
-yxhaust . . 0.254/0.305 mm, 0.010 - 0.012 ins
,. .
ESPRIT
Issue 04\78