Fuel Fired Booster Heater
Fuel Fired Booster Heater
Special tools:
951 2619 Pliers 951 2619 Pliers
Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.
Preparatory work
Removing components and draining the engine coolant
Remove:
- the EVAP canister hose (1) from the intake manifold
- the intake manifold (2) between the air cleaner and the turbocharger.
Remove:
- the hose clamps at the mass air flow (MAF) sensor
- the hose clamps at the turbocharger (TC)
- the screws for the intake manifold in the cylinder head.
Remove the expansion tank cap.
Raise the vehicle.
Remove the shield under the vehicle. It is secured with 7 clips. See the illustration.
Install a hose on the nipple at the radiator.
Feed the hose down to a container.
Open the nipple. Drain off the engine coolant.
Removal
Removing the engine coolant heater
Disconnect the engine coolant hose (1). Plug the opening to prevent the remaining coolant in the heater running out in an uncontrolled way.
Place paper under the engine coolant heater to collect any engine coolant spillage.
Remove:
- the connector (2) for the engine coolant heater
- the fuel line (3) from the clip below the heater.
Open the holder (4) for the radiator hoses behind the engine to expose the lower radiator hose running down to the water pump.
Remove the exhaust pipe from the engine coolant heater. See: Fuel Fired Booster Heater Exhaust Pipe, B5254T7, L.H.D Service and Repair.
Disconnect the connector for the water pump.
Hint: Mark the location of the upper hose on the water pump.
Position a container below the water pump to collect any spilled engine coolant.
Disconnect the upper hose, as illustrated. Plug the opening.
Remove:
- the mounting screw for the engine coolant heater. See the illustration
- the bracket for the connector.
Angle out the top edge of the engine coolant heater.
Place paper around the upper fuel connection on the engine coolant heater.
Disconnect the fuel hose.
Hint: Use: 951 2619 Pliers 951 2619 Pliers to detach and secure the clamps.
Lift up the engine coolant heater.
Transferring components
Transferring engine coolant hoses
Transfer the engine coolant hoses.
Note! Mark the internal position of the hoses in relation to each other before removal. This ensures that the hoses are correctly positioned and not under stress during installation.
Installation
Installing the engine coolant heater
Position the engine coolant heater in its lower mounting.
Install the fuel line over the engine coolant heater using a new clamp.
Hint: Use: 951 2619 Pliers 951 2619 Pliers to secure the clamp.
Press the top edge of the heater into place.
Install the mounting screw and the bracket for the connector. Tighten. See: Tightening torque [1][2]Body and Frame.
Install:
- the lower coolant hose on the water pump. See the marking made earlier
- the connector on the water pump
- the exhaust pipe for the engine coolant heater. See: Fuel Fired Booster Heater Exhaust Pipe, B5254T7, L.H.D Service and Repair
- the radiator hose for the water pump in its holder
- the fuel line in the clip below the engine coolant heater
- the connector for the engine coolant heater
- the radiator hose into the passenger compartment.
Install:
- the screws for the intake manifold in the cylinder head
- the hose clamps at the turbocharger (TC)
- the hose clamps at the mass air flow (MAF) sensor
- the intake manifold between the air cleaner (ACL) and the turbocharger (TC)
- the hose for the EVAP canister from the intake manifold.
Tighten the drain nipple on the radiator.
Fill with coolant and warm up the engine until the thermostat opens.
Top up if necessary.
Finishing
Testing the engine coolant heater and installing the cover
Carry out a performance test of the engine coolant heater. See: Fuel-powered preheater, checking Fuel-Powered Preheater, Checking.
Install the shield under the vehicle using the 7 clips.