Ford Sierra Manual

Specifications
Engine electrical systems / Specifications


System type
1.3 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bosch inductive discharge system 1.6 litre models (except Economy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bosch inductive discharge system 1.6 litre Economy models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESC system with Lucas Hall effect distributor 1.6 litre CVH (R6A type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Distributorless controlled by EEC IV system 1.8 litre SOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESC II system with Bosch Hall effect distributor 1.8 litre CVH models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESC Hybrid system 1.8 litre CVH (R6A type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Distributorless controlled by EEC IV system 2.0 litre SOHC carburettor models up to 1985 . . . . . . . . . . . . . . . . . . . . Bosch inductive discharge system 2.0 litre SOHC carburettor models from 1985 (except P100) . . . . . . . . . ESC II system with Bosch Hall effect distributor 2.0 litre DOHC carburettor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESC II system P100 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bosch inductive discharge system 2.0 litre SOHC fuel injection models up to 1987 . . . . . . . . . . . . . . . . . . EEC IV system with Motorcraft Hall effect distributor 2.0 litre SOHC fuel injection models from 1987 . . . . . . . . . . . . . . . . . . . EEC IV system with Bosch Hall effect distributor 2.0 litre DOHC fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . EEC IV system
Coil
All models except CVH (R6A type) and 2.0 litre DOHC Output (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.0 kilovolts Primary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.72 to 0.88 ohm Secondary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4500 to 7000 ohms 1.6 and 1.8 litre CVH (R6A type) Output (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0 kilovolts Primary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 0.05 ohms 2.0 litre DOHC carburettor model Output (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.0 kilovolts Primary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.72 to 0.88 ohms Secondary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4500 to 8600 ohms 2.0 litre DOHC fuel injection model Output (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0 kilovolts Primary winding resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.72 to 0.88 ohms Secondary resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4500 to 8600 ohms Distributor
Direction of rotor arm rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise Firing order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 3 - 4 - 2 (No 1 cylinder nearest timing cover) Dwell angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatically controlled by electronic module (not adjustable)
Ignition timing Leaded petrol Unleaded petrol (at idle with vacuum pipe disconnected) (4-star, 97 RON) (Premium, 95 RON) Early Economy models (800 rpm - vacuum pipe connected) . . . . . . . 16º BTDC 12º BTDC
1.3 litre models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12º BTDC 8º BTDC* 1.6 litre models with VV carburettor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12º BTDC 8º BTDC* 1.6 litre models with 2V carburettor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10º BTDC 6º BTDC 1.8 litre SOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10º BTDC 6º BTDC 1.8 litre CVH models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESC Hybrid controlled, no adjustment possible 2.0 litre carburettor models up to 1985 . . . . . . . . . . . . . . . . . . . . . . . . . 8º BTDC 4º BTDC* 2.0 litre carburettor models from 1985 (except P100) . . . . . . . . . . . . . . 10º BTDC 6º BTDC P100 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6º BTDC 2º BTDC 2.0 litre fuel injection models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12º BTDC 8º BTDC *Fill with leaded petrol (4-star, 97 RON) every 4th tankful Not all vehicles are suitable for continuous operation on unleaded petrol.

Spark plugs
Make and type:
All models except 1.8 CVH, CVH (R6A), 2.0 DOHC and P100 . . . . . . . . Champion RF7YCC or RF7YC
1.8 CVH engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RC7YCC or RC7YC P100 model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RF7YC or F7YC 1.6 and 1.8 CVH (R6A type) and 2.0 DOHC . . . . . . . . . . . . . . . . . . . . . . Champion RC7YCC
Electrode gap:
Champion F7YCC or RC7YCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 mm (0.032 in) Champion RF7YC, F7YC or RC7YC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 mm (0.028 in)
Note: The electrode gap above is the figure quoted by Champion for use with their recommended spark plugs. If plugs of any other type are fitted, refer to their manufacturers gap recommendations.

HT leads
All SOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-09 or LS-10 boxed set 1.8 CVH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-10 boxed set 1.6 and 1.8 CVH (R6A type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-30 boxed set 2.0 DOHC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-29 boxed set Maximum resistance per lead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 000 ohms
Alternator
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bosch, Lucas, Motorola, or Mitsubishi Regulated output voltage at 4000 rpm (3 to 7 amp load) . . . . . . . . . . . . 13.7 to 14.6 volts
Minimum brush length:
All alternator types except Motorola . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 mm (0.20 in) Motorola type alternators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 mm (0.16 in) Starter motor
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pre-engaged; Bosch, Cajavec, Lucas, or Nippondenso Minimum brush length:
All except Bosch long frame 1.1 kW and JF, and Nippondenso . . . . 8.0 mm (0.32 in)
Bosch long frame 1.1 kW and JF, Nippondenso starter motors . . . . 10.0 mm (0.40 in)
Battery charge condition: Poor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 volts Normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6 volts Good . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.7 volts Torque wrench settings Nm lbf ft Spark plugs:
SOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 28 15 to 21 CVH models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 to 33 13 to 24 DOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 to 21 11 to 15 Crankshaft speed/position sensor clamp bolt (ESC Hybrid system) . . . 4 to 7 3 to 5
Crankshaft speed/position sensor screw (DOHC) . . . . . . . . . . . . . . . . . 3 to 5 2 to 4
Camshaft sprocket bolt (CVH models) . . . . . . . . . . . . . . . . . . . . . . . . . . 95 to 115 70 to 85 Air charge temperature sensor (CVH-R6A and DOHC) . . . . . . . . . . . . . 20 to 25 15 to 18
Engine coolant temperature sensor (CVH-R6A and DOHC) . . . . . . . . . . 20 to 25 15 to 18
Fuel temperature sensor (DOHC injection) . . . . . . . . . . . . . . . . . . . . . . . 8 to 11 6 to 8
Alternator adjustment bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 to 28 15 to 20 Alternator mounting bolts: With coloured patch on threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 to 51 30 to 38 Without coloured patch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 25 15 to 18


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