Coolant pump [Toyota Dyna Y50]

Removal the coolant pump

1. Drain the coolant.

2. Remove the coolant pump drive belt.

a) Press firmly on the fan pulley drive belt and loosen the pulley mounting nuts.

b) Loosen the pivot bolt and belt tension adjustment bolt; remove the belt.

3. Remove the fan and coolant pump drive pulley.

(Option with viscous coupling in the fan drive)

Unscrew the four nuts securing the viscous coupling to the pulley, remove the fan, coupling housing and pump pulley.

(Option without viscous coupling in the fan drive)

Unscrew the four nuts securing the drive shaft to the pulley, remove the fan, drive shaft (hub) and pump pulley.

4. Remove the coolant pump.

a) Loosen the bolt and disconnect the tension control rod of the coolant pump drive belt from the pump housing.

b) Unscrew the nut, four bolts and remove the pump and gasket.

Checking the coolant pump components

1. Turn the pump shaft by the mounting flange, make sure there is no play in the bearings, and that it rotates freely without jamming. If necessary, replace the pump.



2. Inspect the fan drive viscous coupling. If there is significant damage or silicone fluid leakage, replace the coupling.

Installing a Coolant Pump

1. Install the pump together with a new gasket onto the timing chain drive housing; install the tension control rod for the coolant pump drive belt; secure these parts with a nut and five bolts.

Tightening torques:

• pump housing - 16 Nm;
• tension adjustment rods - 39 Nm

2. Install the pump drive pulley and fan.

The original version is published on the website toyotaman.ru

(Option with viscous coupling in the fan drive)

Secure the liquid pump drive pulley and viscous fan assembly with four nuts.

(Option without viscous coupling in the fan drive)

Secure the liquid pump drive pulley and the fan assembly with its drive shaft (hub) using four nuts.

3. Install and adjust the drive belt.

Adjust the drive belt tension.

4. Fill with coolant (see above).

5. Start the engine and check for leaks.