Reliant 700 ccm ohv engine - tech data page

Engine 700 ccm type
Type	4 cylinder overhead valve, pushrod operated
Cylinder head	Aluminium alloy
Cylinder block	Aluminium alloy/cast iron 'wet' liners
Bore	60,5 mm (2,38 in)
Stroke	60,96 mm (2,4 in)
Capasity	700 ccm (47,6 cu in)
BHP	29 at 5000 rpm (3/30; 32 BHP)
Compression ratio	7.8:1
Firing order	1 3 4 2

Crankshaft
Type	Forged steel, three bearing
Main bearing journals	1.7487 to 1.7482 in (44.6 to 44.4 mm)
Crankpin journals	1.3125 to 1.3120 in (33.4 to 33.3 mm)
End float	Minimum 0.0002 in (0.0508 mm) Maximum 0.003 in (0.1524 mm)
Regrinding sizes;
First undersize	0.010 in (0.254 mm)
Main bearing journals	1.7387 to 1.7382 in (44.5 to 44.1 mm)
Crankpin journals	1.3025 to 1.3020 in (33.1 to 33.07 mm)
Second undersize	0-020 in (0.5080 mm)
Main bearing journals	1.7287 to 1.7282 in (43.9 to 43.92 mm)
Crankpin journals	1.2925 to 1.2920 in (32.84 to 32.81 mm)
Steel backed shell bearings are available to fit all reground bearing sizes staed

Pistons
Type	Aluminium split skirt
Oversize pistons (availability)	+0.010 in (0.2540 mm) '-0.020 in (0.5080 mm) +0.040 in (0.0160 mm)
Standard diameter	2.38 in (60.5 mm)

Pistin rings
Compression (two-top)
Gap	0.0007 to 0.012 in (0.1523 to 0.2796 mm)
Width	1/16in (0.063 mm)
Groove clearance (compression rings) (oil scraper)	0.0015 to 0.0035 in (0.0518 to 0.1016 mm) 0.0015 to 0.0035 in (0.0518 to 0.1016 mm)
Oil control (bottom)
Gap	0.0006 to 0.011 in (0.1524 to 0.2794 mm)
Width	5/16 in (0.315 mm)
Groove clearance	0.0025 to 0.0045 in (0.0762 to 0.1270 mm)
Gudgeon pin diameter	0.5004 to 0.50015 in (12.802 to 12.751 mm)
Small end bush bore	0.5005 to 0.5002 in (12.827 to 12.7508 mm)

Camshaft
Bearing diameter	1.562 to 1.5625 in (39.9 to 39.7 mm)
Bearing clearances	minimum 0.005 in (0.1270 mm) maximum 0.002 in (0.1524 mm)
End float	minimum 0.0025 in (0.0762 mm) maximum 0.0065 in (1.6510 mm)

Valves
Tappet clearance - inlet and exhaust	0.010 in cold (0.2540 mm) 0.006 in hot (0.1524 mm)
Seat angle	45 degrees
Seat width	1/32 in (0.031 mm)
Guide length	1.875 in (47.6 mm)
Stem clearance (inlet/exhaust)	minimum 0.0015 in (0.0518 mm), maximum 0.0035 in (0.1016 mm)
Valve spring free length	1.593 in (40.5 mm)

Capasities
Sump	6 pints (2.8 litres)
Sump and new oil filter	6 pints (3.4 litres)

Torque wrench settings
Cylinder head nuts	25 - 25 lb ft (31.3 - 34 Nm)
3 special cylinder head nuts	15 lb ft (20.35 Nm)
Main bearing nuts	23 lb ft (31.3 Nm)
Big end bearing bolts	21 lb ft (28.6 Nm)
Flywheel bolts	30 lb ft (40.67 Nm)

Gearbox

Number of gears

Four forward, and reverse

Synchromesh

Second, third and top

Gear ratios

- First

- Second

- Third

- Top

- Reverse

Car	Van
18.69:1	21.97:1
10.76:1	12.65:1
6.36:1	7.48:
4.375:1	5.14:1
24.03:1	28.24:1

Oil capasity

1 pint (0.6 litres)

Mainshaft end float

0.004 to 0.006 in
(0.1016 to 0.1524 mm)

Clutch
make	Borg and Beck
Type	6 1/4 in (159 mm) single dry plate
Actuation	Rod and lever
Clutch release bearing	Carbon
Pedal free movement	1/2 inc (12.7 mm)

Cooling system
Type of system - ohv - sv	- Pressurised pump impeller fan assisted - Thermosyphon
Thermostat location	Cylinder head
Starts to open	80 degrees C (176 deg F)
Fully open	94 degrees C (200 deg F)
Radiator pressure cap opens	4 lb in2 (0.49 kgf cm2)
Fan belt tension	1/2 in (12.7 mm) totale movement at center of longest run
Coolant capasity (incl heater)	7 pints (4 litres)
Torque wrench settings
Water pump securing nuts	7 lb ft (9.5 Nm)
Thermostat housing cover bolts	12 lb ft (16.3 Nm)
Fan blade bolts	6 lb ft (8.16 Nm)

Ingnition system OHV engines
Distributor
Make and type - 600 ccm - 700 ccm	Lucas 25D4 (40872 A/D) Lucas 41244A
Contact breaker gap	.015 in (.38 mm)
Contact breaker spring tension	18 - 24 oz
Condenser	.18 to .23 mfd
Vacum advance commences maximum	3,5 in hg 0 degree 20 in hg 7-9 degrees
Timing - static	10 deg BTDC
Firing order	1 3 4 2
Direction of rotation	Anticlockwise
Coil	Lucas LA12
Sparkplug, make and type	Champion N5
Sparkplug, gap	,.18 in (.457 mm)