85-30-00 Reciprocating Engine Cylinder Section
85-30-10 Intake Air
85-30-11 Removal of the Intake Air Manifold
1. Remove the intake hoses - refer to the applicable Aircraft Maintenance Manual.
2. Put a container below the engine coolant drain.
3. Drain the engine coolant - refer to the applicable Aircraft Maintenance Manual.
4. Remove the coolant hoses - refer to the applicable Aircraft Maintenance Manual.
5. Remove the coolant thermostat - refer to Chapter 85-70-41.
6. Remove the intake-air temperature sensor#1-IAT1 (B50/1) and intake air
temperature sensor #2 – IAT2 (B50/2) refer to Chapter 85-30-31.
7. Remove the boost pressure sensor #1 – BPS1 (B5/1) and boost pressure sensor #2 –
BPS2 (B5/2) refer to Chapter 85-30-21.
8. Remove the coolant temperature sensor #1 – CTS1 (B50/3) and coolant temperature
senor #2 – CTS1 (B50/4) refer to Chapter 85-70-11.
9. Remove the screw [10] 9x.
10. Remove the intake air manifold [13].
11. Take off the gasket [9].
12. Clean the sealing surface.
85-30-12 Installation of the Intake Air Manifold
1. Fit on the new gasket
2. Put the intake air manifold in position above the cylinder head sealing area.
3. Screw the intake air manifold down with 14 Nm
4. Install the coolant thermostat [11] – refer to Chapter 85-70-42.
Inspect for the correct position of the O-ring.
5. Install the coolant hoses -refer to the applicable Aircraft Maintenance Manual.
6. Install the intake air temperature sensor #1 & #2 – refer to Chapter 85-30-32.
7. Remove the security plug of the sensor and connector.
8. Install the electrical connectors to the intake-air temperature sensor +#1-IAT1
(B50/1) and intake air temperature sensor #2 – IAT2 (B50/2).
9. Install the boost pressure sensor #1 & #2 - refer to Chapter 85-30-22.
10. Install the electrical connectors to the boost pressure sensor #1 – BPS1 (B51) and
boost pressure sensor #2 – BPS2 (B5/2).
11. Install the coolant temperature sensor #1 & #2 - refer to Chapter 85-70-12.
12. Install the electrical connectors to the coolant temperature sensor #1 – CTS1 (B50/3)
and coolant temperature sensor #2 – CTS1 (B50/4).
13. Install the air intake hoses - refer to the applicable Aircraft Maintenance Manual.
14. Fill engine with coolant and bleed the cooling system – refer to the applicable Aircraft
Maintenance Manual.
15. Perform an engine ground run according to Chapter 71-00-03.
16. After the ground run inspect coolant system for leakage.
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