0.4. Jacking-up of the Vehicle (page 2 of 2)

170 engines: … 1971 c.c.
Number of cylinders: … 4
Cylinder arrangement: … In-line
Firing order: … 1—3—4—2 (No. 1, flywheel side)
Valve arrangemen: … Overhead valves, two rocker shafts
Camshaft: … In side of cylinder block
Cylinder block: … Cast-iron, “wet” cylinder liners
Timing drive: … With timing chain
Pistons: … Aluminium-alloy with three piston rings

Cylinder Bore:
1.8 litre: … 84.0 mm (3.3373 in.)
2.0 litre: … 88.0 mm (3.4962 in.)

Piston Stroke:
1.8/2.0 litre: … 81.0 mm (3.2181 in.)

Compression Ratio:
1.8 litre: … 7.5 : 1
2.0 litre, 78 BHP: … 8.0 : 1
2.0 litre, 85 BHP: … 8.8 : 1

Max. Power (DIN):
1.8 litre: … 69 BHP (50 kW) at 4800 rpm
2.0 litre (170 B): … 78 BHP (56.5 kW) at 5000 rpm
2.0 litre (170 C): … 85 BHP (62.5 kW) at 4750 rpm

Max. Torque (approx.):
1.8 litre engine: … 13.4 kgm (96.5 ft.lb.) at 2300 rpm
2.0 litre engine (170 B): … 15.0 kgm (108 ft.lb.) at 2500 rpm
2.0 litre (170 C) engine: … 16.0 kgm (115.2 ft.lb.) at 2500 rpm

Oil Pressure:
At 800 rpm: … 2.7 ± 0.8 bar
At 2000 rpm: … 3.3 ± 0.7 bar
At 4000 rpm: … 3.8 ± 0.7 bar

Valve Timing 169B/170B                               170 C
Inlet valve opens: … 6° ATDC                 2° ATDC
Inlet valve closes: … 33° ABDC                35° ABDC
Exhaust valve opens: … 21° BBDC                 34° BTDC
Exhaust valve closes: … 6° ATDC                4° 30’ ATDC

Above opening and closing angles are given with a theoretical valve clearance of 0.7 mm

BTDC = Before top dead centre
ATDC = After top dead centre
BBDC = Before bottom dead centre
ATDC = After top dead centre

Valve clearances:
Inlet valves: … 0.10 mm
Exhaust valves: … 0.25 mm

Note: Throughout the engine section the engine will either be referred to as “169” or “170”. Differences within the “170” engine groups will be referred to with the actual engine type, i.e. “170 B” or “170 C”, enabling you to identify the modifications that have taken place on the latter of the two engines.