Identification - Lotus TURBO ESPRIT Service Manual

Page 70 SECTION TD A
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Piston
-
(Cont
.)
Identification
I
2.0 LITRE 907
%:I C.R
2.0 LITRE 907
8.4:l CR.
2.2 LITRE 912.
944:l
CR.
2-2 UTRE 912
10.9:l
CR.
2.2 LITRE 910
751 CR.
2.2 LITRE 9 l 0
B a l
CR.
-
Rings
2 compression,. 1 oil control
-
Diameter 907
-
grade
'A' 95.1 66/95.179
rnrn
(3.7467/3.7472 i n)
907
-
grade 'B' 95 . I 79/95 . I 92
rnm
(3.7472/3.7477
i
n)
91 2 Std
-
grade
'A
'
95.148/95.161
rnrn
(3.7460/3.7465 in)
912 Std
-
grade
'B'
95.161/95.174 mm (3.7465/3.7470 in)
912 HC
-
grade
' A '
95.205/95.219
mm
(3.7482/3.7488 in)
912 HC
-
grade 'B' 95.21 7/95.231
mm
(3.7487/3.7493 in)
-
Grade diameter
-
907/912 Std 15
mm
(0.6 in) up from skirt edge
-
912 HC
10.2mm (0.4 in) up fromskirt edge
1
900
pinaxis
-
Gudgeon pin bore offset 907/912 Std 1 .52
mm
(0.060 in) towards thrust face
912 HC 1 .50
mm
(0.059 in) towards thrust face
-
Permissable weight variation
betweenpistons. 907/912~td 3.5 grammes
912 HC 3.0 grammes
-
Ring gap 907/912 Std
-
top 0.38/0.51
mm
(0,015/0.020
in)
-
second
0.48/0.61
mm
(0.019/0..024 in)
-
scraper (rails) 0.38/1 .14 m m (0.015/0,045 in)
912 HC
-
top&second 0.40/0.65
mm
(0.016/0.026 in)
APR 1987
-oil control 0.30/0.60
mm
(0.f 12/0.024 in)