Lotus TURBO ESPRIT Service Manual page 30

Page 4
SECTION TD B
*!
CAMSHAFTS AND VALVE TIMING
*
All cams are symmetrical opening/closing
VALVES
Cam Type
Designation
Angle of valve seats and faces
FDIAAC/~
Spec.No.
Domestic
&
Export
USA
1
(Carb)
I
I
USA
I
(HCI)
Head diameter
-
lnlet
-
Exhaust
Identif.
on shank
between
pulley
&
107
107
107
Stem diameter
-
l nlet
Inlet
M.O.P.
ATDC*
Duration
(crank
degrees 1
-
Exhaust
Stem
clearance in guide
-
lnlet
cam hsg
.
777..
. .
777....
777
....
Cam
Pulley
Timing
Valve clearance (cold)
Dot
green
red
red
'Valve
Seat
1 nserts
Exhaust
252O
252O
252'
-
Exhaust
-
lnlet
-
Exhaust
M.0.P
BTDC*
104O
104"
100"
4 5 O
35.47
-
35.65
mm
(1 .396
-
1 .404 in.)
30.70
-
30.90
mm
(1.209
-
1.217 in.)
7.125
-
7.137mm (0.2805
-
0.2810 in.)
7.955
-
7.970
mm
(0.31 32
-
0.31 38 in.)
0.008
-
0.046
mm
(0.0003
-
0.001 8 in.)
0.030
-
0.070
mm
(0.001 2
-
0.0027 in.)
0.13
-
0.18
mm
(0.005
-
0.007 in.)
0.25
-
0.31
mm
(0.010
-
0.012 in.)
Cam
Pulley
Timing
Dot
green
green
blue
'
Lift
0.378"
0.378"
0.378"
Bore i n head:
Standard
104O
110'
110'
+0.025
mm
(0.001 in)
+
0.050
mm
(0.002 in)
+
0,127
mm
(0.005 in)
DEC 1986
-
Inlet
37.235/37.260
mm
.
(1.466/1 .467 i n .)
-
Exhaust
34.290/34.315 mm. (1.350/1 .351 in.)
-
Inlet
37.260/37.285 m m
.
(1.467/1
.468
i n .)
-
Exhaust
34.315/34.340 mm. (1.351/1 .352 in.)
-
Inlet
37.285/37.315 mm. (1.468/1 .469 i n .)
-
Exhaust 34.340/34.365 mm. (1 .352/1 .353 in.)
-
Inlet 37.365/37.390 mm. (1.471/1 .472 in.)
0:
-
Exhaust
34.41 5/34.440 m m
.
(1.355/1 -356 i n
.)