Diesel car engine Volkswagen Passat B3

Working principle of diesel engine
In a diesel engine, clean air is sucked into the cylinders and compressed there. Due to this, the temperature in the cylinders rises above the auto-ignition temperature of diesel...

Turbocharger
In the turbocharger, two wheels, turbine and compressor, are installed on one shaft, which are located in housings separated from each other. The exhaust gases are used to drive...

Toothed belt tension adjustment
Diesel engines other than 90/110 hp gas turbine supercharged engine Remove upper toothed belt cover. Hit the timing belt with a rubber mallet between the camshaft and injection...

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

Removal and installation of a gear belt / adjustment of management of the engine
The toothed belt must be checked for wear as part of maintenance and replaced if necessary. The 90/110 hp supercharged engine has the toothed belt with tensioner must be replaced...

Checking the preheating system / glow plugs
Supercharged diesel engine instructions are at the end of this section. Attention: A defect in the preheating system causes difficulties when starting a cold engine, especially at...

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

Diesel 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 connections. The direction...

Checking / replacing the fuel cutoff solenoid valve
Until 9/93 Fuel cut off solenoid valve ( 10 see picture ) on the injection pump opens the fuel supply when the ignition is switched on. It must be checked when the engine does not...

Throttle adjustment
Attention: Throttle thrust is very sensitive to buckling, so it must be handled with great care during installation. One slight buckling can later lead to breakage while driving....

Cold start pull adjustment
Diesel engines other than supercharged VW PASSAT diesel engines are equipped with a cold start aid. Using the drive rod, the injection advance piston in the high pressure fuel...

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

Checking the start of delivery of the high pressure fuel pump
The start of injection pump supply can be checked both on the installed and removed engine from the vehicle. This describes the test on the installed engine. For verification, a...

Removal and installation of nozzles
Defective injectors can cause heavy knocking in the engine and raise the suspicion of damaged bearings. With such suspicions, the engine should be switched to idle mode and the...

Fuel supply in a diesel engine
The power supply system includes a fuel tank, fuel lines, a high pressure fuel pump (injection pump) with injectors, as well as a fuel filter. The air from the fuel tank is...

Fuel Filter — Preheating System
In order for the fuel to remain liquid even at low ambient temperatures, it is preheated. This is due to excess fuel which is normally returned from the high pressure fuel pump to...

Replacing the diesel engine air filter
Replace the air filter element every 30,000 km. In case of high dust content, it is necessary to clean and replace the filter element at shorter intervals. Disconnect the...

Water removal / fuel filter replacement
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. Attention: Make sure that...

Diagnostics of malfunctions of the injection system of diesel engines
The following prerequisites must be met before fault diagnosis can be used to detect faults: Error conditions during start-up are excluded. There should be fuel in the tank, the...

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