8-valve car engine cooling system Volkswagen Passat B4

Features of the cooling system
The engines use a liquid cooling system with forced circulation. The cooling system includes an aluminum radiator, expansion tank, water pump, thermostat and electric fan. The...

Replacing the coolant
During operation, the coolant does not require replacement. Only an annual check of the fluid level is necessary. If it is necessary to replace the coolant, perform the following...

Removal, disassembly and assembly of the water pump
To remove and install the water pump, drain the fluid from the cooling system. Disconnect the wire from the negative terminal of the battery. Remove the generator. Disconnect the...

Checking the cooling system
To check the tightness of the system, install the VW 1274 testing device on the expansion tank. Using the device, create excess pressure of 1 kgf/cm² in the cooling system. If the...

Features of the lubrication system
All engine models have a pressure lubrication system. Oil is sucked from the engine crankcase through the mesh filter of the oil receiver and is pumped by the gear oil pump into...

Removal, disassembly, inspection of technical condition and assembly of the oil pump
Unscrew the two bolts securing the oil pump cover to the housing. Separate the cover from the housing. Remove the drive shaft and the drive gear of the oil pump. Wash the pump...

Maintenance of the lubrication system
Check the oil level of the lubrication system every 500 km of the vehicle's mileage or before a long trip. Check on a cold engine or a few minutes after stopping the engine,...

This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian

Passat B6 Passat B5 Passat B4

Passat B3 Passat B2