Diesel car engine Volkswagen Passat B3

How a diesel engine works
In a diesel engine, clean air is sucked into the cylinders and is highly compressed. This causes the temperature in the cylinders to rise above the autoignition temperature of...

Turbocharger
In a turbocharger, two wheels, a turbine wheel and a compressor wheel, are installed on one shaft and are located in housings separated from each other. Exhaust gases are used to...

Adjusting the timing belt tension
Diesel engines, except turbocharged engines with a capacity of 90/110 hp. Remove the upper timing belt cover. Hit the timing belt with a rubber hammer between the camshaft and...

Toothed belt drive
Diesel engines with a capacity of 65-80 hp up to 9/94 1 - bolt, 10 Nm 2 - rear toothed belt protective screen 3 — camshaft gear 4 - Upper toothed belt casing 5 — bolt, 45 Nm 6 —...

Removal and installation the timing belt / adjusting the engine control
The toothed belt should be checked for wear as part of the maintenance and replaced if necessary. On the turbocharged 90/110 hp engine, the toothed belt with tension roller should...

Checking the preheating system/glow plugs
Instructions for the turbocharged diesel engine are given at the end of the section. Caution: A defective preheating system causes difficulties when starting a cold engine,...

Removal and installation glow plugs
Removal Remove the high pressure fuel lines, see below . Unscrew the electrical wires from the glow plugs. Remove the glow plugs. Installation Screw in the glow plugs and tighten...

Diesel engine injection system
1 - sealing ring 2 - control valve For fuel heating system. 3 — return fuel line 4 - locking bracket 5 — fuel supply line 6 - fuel filter Do not mix up the connection points. The...

Checking/replacing the fuel shut-off solenoid valve
Until 9/93 Fuel Shut-Off Solenoid Valve ( 10, see picture ) on the high-pressure fuel pump opens the fuel supply when the ignition is turned on. It is subject to testing when the...

Adjusting the gas thrust
Caution: The gas rod is very sensitive to longitudinal bending, so it must be handled very carefully during installation. One slight longitudinal bend can later lead to breakage...

Adjusting the cold start thrust
Diesel engines, except turbocharged engines The diesel engines of VW PASSAT vehicles are equipped with a cold start aid. The drive rod moves the piston of the injection advance...

Checking and adjusting idle speed/maximum speed
Diesel engines, except turbocharged engines Note: For a direct injection diesel engine, the idle speed and maximum speed do not need to be adjusted, as these parameters are...

Checking the start of the high pressure fuel pump
The start of the injection pump can be checked both with the engine installed and removed from the vehicle. The check on the installed engine is described here. The check requires...

Removal and installation injectors
Injector defects can cause loud knocking in the engine and raise suspicions of bearing damage. If you suspect this, you should switch the engine to idle mode and loosen the union...

Fuel supply in a diesel engine
The fuel system includes a fuel tank, fuel lines, a high-pressure fuel pump (HPFP) with injectors, and a fuel filter. Air is removed from the fuel tank using the ventilation...

Fuel filter — preheating system
In order for the fuel to remain liquid even at low ambient temperatures, it is preheated. This is due to the excess fuel that is normally returned from the high-pressure fuel pump...

Replacing the air filter of a diesel engine
Replace the air filter element every 30,000 km. In high dust conditions, clean and replace the filter element at shorter intervals. Disconnect the crankcase ventilation hose from...

Removal water/replacing fuel filter
To avoid malfunctions during vehicle operation, it is necessary to remove water from the fuel filter every 15,000 km and replace it every 30,000 km. Caution: Make sure that no...

Diagnostics of faults of the injection system of diesel engines
Before detecting a fault based on diagnostics, the following prerequisites must be met: Conditions for starting errors are excluded. There must be fuel in the tank, the engine is...

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