195519 Removing and installing housing for coolant regulator

WM 195519 Removing and installing housing for coolant regulator

Technical values





Preliminary work

WARNING

Hot fluid

- Danger of scalding

-> Let the fluid cool down.
-> Wear personal protective gear.

1. Drain coolant.
-> 193817 Draining and filling coolant Service and Repair.

WARNING

Objects or loads falling down

- Risk of squashing or crushing

-> Secure components to prevent them from falling down.

2. Lower the engine and push it 30-40 mm to the rear.
-> 1001IN Lowering the engine to complete other work 1001IN Lower the engine to complete other work.

Removing coolant regulator housing

Information

Specifications for wrench sizes (a/f specifications) for screw heads are described as follows:

- Torx screws: (E.) for external Torx, (T.) for internal Torx.

- Hexagon-head bolts (internal and external hexagon): Wrench size (a/f)

Information

- Always replace O-rings.

- Moulded seals can be reused and are only replaced if damaged.

Component overview of coolant regulator housing and coolant pump:





Overview of coolant regulator housing with 987 II coolant pump





1. Remove coolant regulator cover.
-> 195519 Removing and installing coolant regulator cover 195519 Removing and installing coolant regulator cover.
2. Disconnect coolant pipe -1- on the coolant regulator housing.





Coolant connection pipe to thermostat housing

2.1. Unscrew external Torx screw (E10, M6 x 12) -2-.
2.2. Unscrew two external Torx screws (E10, M6 x 25) -2- on the coolant distributor (cylinder bank 1-3) -1-.





Coolant distributor

2.3. Pull coolant distributor -1- off the coolant pipes -2-.





Coolant distributor and connecting pipes

2.4. Pull coolant pipe -1- off the coolant regulator housing -2-.





Coolant regulator housing

2.5. Unscrew external Torx screw (E10, M6 x 50) -3-.
3. Unscrew three external Torx screws (E10, M6 x 25) -1- on the connecting tube for the coolant pump.





Connecting tube from coolant regulator housing to coolant pump

4. Pull coolant regulator housing down out of the coolant distributor housing.
4.1. Replace the moulded seal -3- between the coolant regulator housing -1- and connecting tube -2-.





Thermostat housing and connecting tube for coolant pump

4.2. Replace O-rings.
5. Carefully clean connections and sealing faces.

Installing housing for coolant regulator

Information

- Grease O-rings, hoses and lines in the cooling system with Kluberplus Gel (Part No. 000.043.205.93).

1. Grease all moulded seals with a light coating of Kluber Plus Gel (Part No.: 000.043.205.93).
2. Push the coolant regulator housing onto the coolant distributor housing connection from below.
2.1. Be careful with the moulded seal -3- between the coolant regulator housing -1- and connecting tube -2- for the coolant pump (risk of severing!).





Thermostat housing and connecting tube for coolant pump

2.2. Fit three external Torx screws (E10, M6 x 25) -1- on the connecting tube for the coolant pump.





Connecting tube from coolant regulator housing to coolant pump

2.3. Fit an external Torx screw (E10, M6 x 50) -3-.





Coolant regulator housing

2.4. Tighten fastening screws.
=> Tightening torque: 13 Nm (9.5 ftlb.)
3. Fit coolant pipe.
3.1. Fit coolant pipe on coolant regulator housing.
3.2. Fit coolant distributor -1- into the coolant pipes -2- from above.





Coolant distributor and connecting pipes

3.3. Secure the coolant distributor -1- with two external Torx screws (E10, M6 x 25) -2-.





Coolant distributor

4. Install coolant regulator cover with coolant regulator.
-> 195519 Remove and install coolant regulator cover 195519 Removing and installing coolant regulator cover.

Subsequent work

1. Raise the engine to installation position and secure it.
-> 1001IN Lowering the engine to complete other work 1001IN Lower the engine to complete other work.
2. Bleed and fill the cooling circuit.
-> 193817 Draining and filling coolant Service and Repair.