Diesel engine cooling system VW Transporter T3

Description of the design of the engine cooling system
Attention! In models up to 3.85, the cooler pipes are partly made of steel. When rusting, they must be noticed in the workshop for plastic ones. (1) cooling pump. (2) preheat...

Connection diagram of the cooling system hoses
Note: The arrows show the passing direction. (1) expansion tank. (2) refill tank. (3) cylinder head flange. (4) cooling pump with regulator. (5) circulation pump. (6) oil...

Antifreeze — general information
Attention! Antifreeze G11 protects the coolant from freezing, reduces corrosion and lime deposits and, in addition, increases the boiling point of water. Other concentrates that...

Coolant replacement
The cooler is replaced only after the repair of the cooling system, in which the cooler is drained. If, during the repair, the cylinder head, its gasket, radiator, heat exchanger...

Radiator — design description
1) 1st stage fan thermostat, switch-on temperature 92-98 degrees, switch-off temperature - 88-93 degrees. 2) 2nd stage fan thermostat, switch-on temperature 100-105 degrees,...

Dismantling and installation of the radiator
Dismantling Remove the radiator grille by putting 5 slotted screws in a vertical position and remove the grille, drain the coolant and assemble it. Disconnect lower radiator hose,...

Dismantling and installation of the valve-regulator
Dismantling Drain the water and collect it. Unscrew the cover on the side of the cooling pump, pull out the regulator valve. Installation Replace seal, install regulator, refill...

Checking the Regulator Valve
If the regulator valve does not open, the motor may overheat. If the thermostat is permanently open, the engine cannot reach its operating temperature. Drain coolant. Remove the...

Dismantling and installation of the cooling pump
Dismantling Drain and collect coolant. Remove the coolant pump V-belt. Remove alternator, see " Dismantling and installation of the generator ". Remove the generator mount....

Dismantling and installation of the temperature indicator sensor
The sensor is located on the flange above the flywheel, see also fig. 19-212. Disconnect battery from "masses". Remove the cable from the sensor, unscrew the sensor. When...

Installing and dismantling the fan thermostat and checking it
The radiator has two thermostats that control the electric fan. Thermostat 1 is located at the top, thermostat 2 at the bottom. The thermostat 1 turns on at a temperature of 93-98...

Dismantling and installation of the cooling pump V-belt, belt tension
Dismantling Remove the 3 bolts on the coolant pump pulley. Remove pulley halves and V-belt. To ensure that the pulley does not rotate when the bolts are loosened, insert and...

Coolant circulation pump
The turbodiesel cooling system includes an additional (see arrow) circulation pump. (19-406) the pump turns on after the engine is turned off and the coolant temperature is above...

Engine cooling system 1.7 liters
There is a hole on the front side of the cylinder head of the 1.7l engine, and the bracket for the injectors screwed to the block has a protrusion in this place, see arrows. As a...

Table of malfunctions of the cooling system
Table of malfunctions of the cooling system Fault: The temperature gauge warning flashes when the engine is overheated.

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Transporter T4 Transporter T3