Page 17 - Vauxhall 20-60 H.P. (R Type) Chassis Shop Manual

VAUXHALL 20-60 SHOP MANUAL

CONNECTING RODS I section beam high tensile steel stamping. Big end bearings
white metal throughout. The small ends are split and pinched by a set screw to lock the
gudgeon pins in position.
Dimensions
.
11” overall length, 8 7” centres.
ELECTRICAL EQUIPMENT Separate unit type. Single pole system with exception
of the horn. Lucas dynamo, direct drive from engine timing chain. Lucas starting motor
mounted on the nearside front of the flywheel housing. Lucas 12 volt 63 amp. battery
carried in metal carrier located under the front floorboards. Lucas instrument panel. Lucas
lamps throughout. Lucas horn.

ENGINE Six cylinders cast en bloc and integral with crankcase. Detachable cylinder head
with overhead valves ( two per cylinder ) operated by enclosed push rods.

Dimensions of Valves
.
Diameter of Head 1 5”
Diameter of Stem . 373”
Exhaust lift . 343”
Inlet lift . 343”
Valve clearance . 007”
Lubrication by pressure to main, big end, camshaft bearings and overhead rocker gear. Oil
pump of the gear type driven from the centre of the camshaft. Submerged and fitted with
oil strainer.
Aluminium alloy pistons.
.
Diameter of cylinder bore, 75 mm ( 2 953” )
Length of stroke, 110 mm ( 4.33” )
.
Piston displacement, 2,916 c.c. ( 177 95 cu. in. )
.
Engine lubricant capacity 17 pints ( 9 7 litres )
52 B.H.P. at 3,000 R.P.M.

FIRING ORDER 1, 5, 3, 6, 2, 4.

FUEL Tank capacity 14 gallons ( 63 litres ). Large side filling pipe equipped with filter and
bayonet type cap. Visible gauge on instrument board.

GEAR BOX Equipped with four forward speeds and reverse. Central ball change.

Clutch and gearbox housing are in one casting, the front of which is bolted to the rear face
of the engine flywheel housing.

Top 3rd 2nd 1st Reverse
.
.
.
.
Ratios Direct 1 53:1 2 31:1 3 55:1 2 98:1
GUDGEON PINS Case hardened mild steel. Ground finish. Pinched in small end of
connecting rod.
.
.
Dimensions: Length 2 594”; Diameter, 875”.
.
GROUND CLEARANCE ( Minimum ) 9” ( 22 86 cm. )

Page 13.