Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 13 / 413

7th
re-issue
Page 12
Length of valves (inlet and exhaust) 4·66 In.
Type of springs Dual
Spring retention Cup and split cotters
Valve spring-free length-Inner ... 1 ·93 In.
·
-Outer 2·23 In.
Valve spring-fitted length-Inner I ·43 In.
-Outer
1 ·55 In.
Valve spring-load fitted-Inner ... 35·9 lbs.
-Outer
70·8 lbs.
(118·36 mm.)
(4·9 cms.)
(5·66 cms.)
(3·63 ems.)
(3•93 ems.)
(16·32 kg.)
(32·20 kg.)
WSM.114
General Data
Guides-Inlet
.. :
2·0 In. (S0·7 mm.) long X ·S6'40/·5636 In.
-Exhaust ... 2· 15 In. (54·6 mm.) long X ·56'40/·5636 In.
(14·3/14·27 mm.) O/dla.
(14·3/14·27 mm.) O/dla.
-Interference fit ·002S/·0045 In. ( ·063/· 114 mm.)
The valve guide protrusion from
the valve spring pocket face Is controlled by a clrcllp that fits In a groove In the
outside of the valve guide. This clrcllp rests on the cylinder head recess below the valve spring pocket,
Rocker clearance (Engine hot)-lnlet
·012 In.
( ·30 mm.)
Exhaust ·014 In.
(·35 mm.)
Timing-Inlet opens
-Inlet closes
-exhaust opens
-exhaust closes
Port diameter-Inlet
CAMSHAFT
No. of bearings
Exhaust
Type of bearings (front, centre and rear) ...
End thrust
Drive
Lubrication
Chain tensioner
End float
Journal diameters (front, centre and rear)
14°B.T.O.C.
52
°
A.B.O.C.
56
° B.B.O.C.
10 ° A.T.O.C.
I •31 In.
I ·06 In.
3
Steel back white metal
Location plate at front
Duplex chain
011 Jet
Spring blade
·002 In.
/·004
in.
I •74n In. /1 ·7470 In.
(3·33 ems.)
(2•69 cms.)
(·05/· 10 mm.)
(44·392/44·374 mm.)
CRANKSHAFT (for torque loading ftpres see table at end of section)
Balance Integrally forged counterweights
·.J
No. of main bearings
3
Type of main bearings
Steel shell white metal lined
Dia. of main journals
2·2495 In. /2·2490 In. (57· 137/57· 125 mm.)
Type of crankpln bearings
Steel shell with copper-lead bearing, Indium lined
Dia. of crankpln bearings (Serles I Alpine, Serles Ill Rapier) 1 ·8760 In. /1 ·8755 In. (47·650/47·638 mm.)
Dia. of C!ilnkpln bearings (Alpine II, Rapier IIIA onwards)
2·0010 In. /2·0005 In. (50·825/50·812 mm.)