Turbocharger — General Information (Mazda BT-50 (1))

Checking the compressor wheel blades

1. Remove the engine trim panel.



2. Remove the air duct located between the air filter housing and the turbocharger.

3. Inspect the compressor wheel blades with a mirror and flashlight as shown in the figure and make sure that they are not damaged or deformed.

Note:

• Make sure the compressor wheel does not touch the turbocharger housing. If the wheel does touch, this may indicate an internal turbocharger failure.
• After replacing the turbocharger, check the intake and exhaust system components, as well as the lubrication system lines, for damage.

If there is damage to the compressor wheel blades, replace the turbocharger.

Checking turbine blades

1. Remove the engine trim panel.

2. Remove the exhaust pipe.

3. Inspect the turbine blades with a mirror and flashlight as shown in the figure and make sure that they are not damaged or deformed.

Note:

• Make sure the turbine wheel does not touch the turbocharger housing. If the wheel does touch, this may indicate an internal turbocharger failure.
• After replacing the turbocharger, check the intake and exhaust system components, as well as the lubrication system lines, for damage.

The original text is published on [Mazbook]

If there is damage to the turbine blades, replace the turbocharger.

Checking the turbocharger guide vane drive

1. Allow the engine to cool.

2. Disconnect the vacuum hose from the actuator.

3. Connect the vacuum pump and check that the valve stem moves when the vacuum changes.

Underpressure:

• less than 14.2 kPa - start of movement
• more than 47.3 kPa - completely displaced

If operation is different from description, replace turbocharger.

Checking the vacuum control valve

1. Remove the valve.

2. Apply air pressure to port "A" of the valve and make sure that air flows from port "A" of the valve to port "B".

3. Apply air pressure to port "B" of the valve and make sure that air does not pass from port "B" of the valve to port "A".



Otherwise, replace the vacuum check valve.

Checking the electromagnetic valve

Checking air conductivity

1. Disconnect the cable from the negative terminal of the battery.

2. Remove the boost pressure control solenoid valve.

3. Check for a break in the valve circuit. Use an ohmmeter to measure the resistance between the terminals. If there is no continuity, replace the solenoid valve.

4. Make sure that air does not flow from hole "A" to hole "B".



5. Apply battery voltage to terminal "A" of the valve and ground to terminal "B".



6. Make sure that air flows from hole "A" to hole "B".

If the above conditions are not met, replace the solenoid valve.

Resistance check

Using an ohmmeter, check the resistance between the valve terminals (at a temperature of 20 - 30°C).

• Resistance - 12.6 -15.6 Ohm

If the resistance differs from the specified value, replace the solenoid valve.