Removal and installation the cooling system manifold (BMW 7 Series E38)

Models with M60 engine

1. Remove the intake manifold (see chapter Engine).

2. Remove the engine crankcase guard.

3. Drain the coolant (see chapter Vehicle settings and routine maintenance).



4. Disconnect the remote temperature gauge (1) and ECM temperature sensor (2, white) connectors. Disconnect the ground wire (3), common to all coils, in the area of the rear lifting eye (4) of the engine.

5. To facilitate access to the cooling system manifold, remove the water valve.



6. Disconnect all cooling system pipes from the manifold.



7. Unscrew the manifold mounting bolts and remove it.



8. Installation is carried out in the reverse order. Clean the mating surfaces, replace the gaskets and sealing rings.

Models with M73 engine

1. Remove both cylinder head covers.

2. Remove the engine crankcase guard.

3. Remove the heat shields from the left side of the front axle beam.

4. Unscrew the coolant drain plugs on the left side of the cylinder block. Drain the coolant (see chapter Vehicle settings and routine maintenance).



5. Mark the crankshaft position sensor connectors, press the lock and disconnect the connectors. Release the transmission wiring harness retaining clip on the rear of the cylinder head and remove the harness.





6. Loosen the clamps and disconnect the hose from the rear of the coolant pipe and from the rear of the cylinder head.







7. Loosen the clamps (1-3) securing the coolant pipes to the end of the heater and disconnect the hoses.



8. Remove the screw.



9. Remove the bolts (1) on both cylinder heads.





10. Remove the cooling system manifold.



11. Installation is carried out in the reverse order. Clean the mating surfaces (1) of the rear of the cylinder heads and the cooling system manifold, replace the gaskets and sealing ring (2).