Elements of the water pump of the M30 engine
1 - water pump;
2 - flange;
3 - retaining ring;
4 - bearing;
5 - hex bolt;
6 - spring washer;
7 - pump housing;
8 - gasket;
9 - stuffing box;
10 - safety ring;
11 - impeller;
12 - pump repair kit.
Withdrawal
Drain the coolant.
Remove poly V-belt.
Remove the radiator.
Loosen the poly V-belt pulley bolts. In this case, you need to hold the pulley by putting a belt on it so that it does not turn. Remove the poly V-belt pulley from the hub.
Remove the four water pump mounting bolts. On 6-cylinder petrol engines, nuts are used instead of bolts.
Screw two M6 threaded bolts into the threaded holes (arrows), and thus press the water pump away from the engine. Make sure the pump is not warped. In a diesel engine, the threaded holes for pushing the pump are located vertically.
Installation
Loosen the screws used to push the pump, replace the water pump O-ring and lubricate the new O-ring with silicone grease or petroleum jelly.
Install the pump with a new gasket and tighten the bolts evenly. The tightening torque is determined by the thread diameter of the bolts: M6 threaded bolts - 10 Nm, M8 bolts - 20 Nm.
Install the pulley and tighten the four bolts of its fastening to 10 Nm.
Install the V-ribbed belt and tension it.
Install a heatsink with a fan.
Pour coolant into the cooling system and bleed air.
Warm up the engine and check the tightness of the hose connections and the water pump.
M70 series engine water pump - removal and installation
The water pump is located on the front of the engine.
Withdrawal
Drain the coolant.
Remove the fan. To do this, while holding the belt pulley with a tool, unscrew the union nut (1). When installing, tighten the nut to 30 Nm.
Attention: The nut has a left-hand thread.
Remove the fan from the shaft.
Remove the water pump drive belt.
Unscrew the damper from its hub.
Holding the drive wheel with the old V-belt, unscrew the four bolts.
Disconnect water hoses. Loosen the pump mounting bolts.
Screw in the three bolts as shown in the figure and press the pump away from the engine block.
Leaky, noisy pump should be replaced
Installation
Installation is made in sequence, return to removal.