Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Factory Service Manual (1994-1999)03 · Engine
03 · Engine

Checking the gap

Make
Alfa Romeo
Model
145/146 Factory Service Manual
Year
1994–1999
Section
Electrical - electronic components (1970 T. SPARK 16V) › Checking the gap
EngineChecking the gap
  1. Raise the car, slacken the fastening screw and remove the rpm and timing sensor.
Rpm and timing sensor 1 with its fastening screw on the engine block

CHECKING THE GAP

  • Set the car on a lift and remove the front section of the exhaust pipe.
  • Remove the rpm and timing sensor (see specific paragraph).
  1. Using tool no. 1.820.079.000 (A.2.0449), find dimension "A".
Measuring dimension A with tool 1.820.079.000 (A.2.0449)
  1. Using a gauge measure dimension "A".
Gauge measuring dimension A
  1. Using a gauge measure dimension "B" on the sensor.
Gauge measuring dimension B on the sensor
  • Calculate the rpm and timing sensor gap and check that it is within the specified limits.
Rpm and timing sensor gap
A - B = 0.5 ÷ 1.5 mm

ENGINE COOLANT TEMPERATURE SENSOR (NTC)

This sensor detects the engine coolant temperature on the thermostatic cup through a thermistor (NTC) with a negative resistance coefficient, i.e. capable of lowering its resistance as the temperature increases. The electric signal obtained reaches the electronic control unit where it is used to correct the air-fuel mixture.

Section of the engine coolant temperature sensor: NTC resistance 1, body 2, connector 3
  1. NTC resistance
  2. Body
  3. Connector

Parts & tools for this job For 1994 Alfa Romeo 145/146

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