Ford Sierra

1982-1993 of release

Repair and operation of the car

Ford Siyerra
+ 1.2. Identification of the car
+ 2. Maintenance
- 3. General data
   - 3.1. Cars with petrol engines
      3.1.1. Masses and transfer numbers
      3.1.2. Operational liquids
      + 3.1.3. Changes in a car design from 1984 to 1986.
      - 3.1.4. Changes in a car design from 1987 to 1989. OHC engine
         + Dm3 CVH 1,8 engine
         + DOHC engine
         + Service and repair
         + Coupling Mechanical five-speed transmission of N type
         + Mechanical MT 75 five-speed transmission Automatic transmission Forward suspension bracket
         + Brake system
         + Electric equipment General data
      + 3.1.5. Changes in a car design from 1990 to February, 1993.
   + 3.2. Cars with diesel engines
+ 4. Engines
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment

a773976c OHC engine


The air duct of new type of the ONS engine equipped with fuel injection

And – an elastic tube,

In – a fastening opening,

With – a fastening collar



Since February, 1987 (code 7B02) in ONS 1,6 engines of dm3 and since September, 1986 (code 6J15) in ONS 2,0 engines of dm3 the shift of an axis of a piston finger concerning a piston axis from 0,8 mm to 0,6 mm is reduced. New pistons cannot be installed with old rods and vice versa.

Fuel system

Since May, 1987 a code (a code of date of production of "HL") some adjusting data of the two-chamber Weber carburetors intended for dm3 ONS 2,0 engines are changed – the deviation of the air gate at the beginning of operation of the vacuum regulator in all Weber 85 HF carburetors makes 8 mm.

Since January, 1988 (a code of date of production of "JB") in engines with injection of gasoline the air duct of new type is installed.

Since May, 1988 cars with the ONS 1,8 engine of dm3 are equipped with the new Pierburg carburetor with designation 85 HF 9510 KC. Its distinctive sign is the yellow point on the valve of the enriching device.

Adjusting data of the carburetor 85 HF 9510 KC
Diameter of the diffuser:
  – 1st camera
23 mm
  – 2nd camera
26 mm
Main fuel jet:
  – 1-й cameras
  – 2nd camera
Fuel jet of idling
Air jet of idling
Idling speed
875 ± 25 rpm.
Contents WITH
Deviation of the air gate
4 mm
Course of a damper of a butterfly valve of mix (dashpot)
1,6 – 2,4 mm

Since July, 1988 (a code of date of production of "JG") in ONS 1,6 engines of dm3 the new 84 HF 9510 DB carburetor with the electromagnetic valve blocking supply of fuel after switching off of ignition for prevention of spontaneous ignition is used.

Adjusting data of the carburetor 84 HF 9510 DB

Idling speed: 875 ± 20 rpm.
Contents WITH: 1%.

Other adjusting data same, as well as in the two-chamber Weber 84 HF 9510 CA carburetor.

Other information concerning a technical characteristic, adjustment and repair of ONS engines is in subsection 4.1 and subsection