We remove the viscous fan clutch and coolant pump for replacement or repair

To make it more convenient to work, we remove the engine radiator and fan casing, as indicated in the article "How to remove the engine radiator UAZ-3151, -31512, -31514, -31519"

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

We unscrew the two bolts securing the coolant pump pulleys with a 12 key for several turns

Saw through the unscrewed bolts with a hacksaw

Hold the bolts with a screwdriver so that they do not rotate

The viscous coupling nut has a left-hand thread, so we unscrew the nut clockwise and turn it counterclockwise

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

We unscrew the viscous coupling nut with a 32 wrench, holding the pulleys from turning

If it is not possible to remove the nut, we apply sharp blows with a hammer on the key in the direction of unscrewing

Remove the viscous fan coupling from the coolant pump shaft

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

Using a 13 wrench, unscrew the four nuts securing the fan impeller to the viscous coupling

Remove the impeller

Install the impeller on the new viscous coupling

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519

Using pliers, unscrew the bolt rods and screw new ones in their place

Installing the viscous coupling by hand-tightening the nut

Tighten the nut with thin-nosed pliers

It is not necessary to tighten the viscous coupling nut with a wrench when installing it, since it self-tightens when the engine is started

Replacing the coolant pump

We remove the radiator of the cooling system, as described in the article "How to remove the radiator of the UAZ-3151, -31512, -31514, -31519 engine"

Remove the viscous fan as above

We remove the auxiliary drive belts, as indicated in the article "How to replace the drive belt for UAZ-3151, -31512, -31514, -31519 units"

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519

Using a 12 key, unscrew the bolts securing the coolant pump pulleys

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519How to replace the fan viscous coupling and coolant pump UAZ-3151, -31512, -31514, -31519

Remove the washer, outer and inner pump pulleys

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

Loosen the hose clamps with pliers

Disconnect the heating hose from the pump

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519

Remove the tee together with the hoses

Unscrew the bolt securing the bar to the generator

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

Using a 13 wrench, unscrew the nut securing the adjusting bar to the block and remove the bar from the stud

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

With a 13 key, unscrew the five nuts securing the pump to the cylinder block, and remove the pump

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519

Use a 10 key to unscrew the bolt securing the pump cover

How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, -31514, -31519How to replace the viscous fan coupling and coolant pump UAZ-3151, -31512, - 31514, -31519

Carefully tapping with a copper hammer, remove the pump cover with gasket

We clean the cylinder block and pump from the remnants of old gaskets

Apply a thin layer of sealant to the new gaskets on both sides

We assemble and install the pump in reverse order