SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder Injection engine (Autogas) | Engine lubrication | Parts of lubrication system | Oil pressure and oil pressure switch: checking

Oil pressure and oil pressure switch: checking

Consult the equivalence table for tools and equipment according to applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Oil pressure tester -V.A.G 1342-

t	Pressure tester -V.A.G 1527 B-

t	Auxiliary cable kit -V.A.G 1594 C-

Test prerequisites

l	Engine oil level, OK

l	Engine oil temperature: at least 80 °C (the cooler fan must have run once)

Note

Checking operation of and servicing visual and acoustic oil pressure gauge Current flow diagrams, → Vehicle diagnostic, testing and information system VAS 5051„Functional and component selection“.

Checking sequence

–	Remove the oil pressure switch -F1-, and screw it into the tester.

–	Screw the tester into the oil filter bracket, in place of the oil pressure switch.

–	Connect the brown wire of the tester to earth (-).

–	Connect the voltage tester -V.A.G 1527 B- with the auxiliary cables from the measuring tool set -V.A.G 1594 C- to positive of battery (+) and to the oil pressure switch. LED should not light up.

–	If the LED lights up, replace the 1.4 bar oil pressure switch -F1-.

If the LED does not light up:

–	Start the engine and increase the revolutions: The LED must light-up between 1.2 - 1.6 bar. If this is not the case, replace the oil pressure switch.

–	Increase engine speed further. At 2,000 rpm and an oil temperature of 80°C, the oil must have a min. pressure 2.7 ... of 4.5 bar.

At higher engine speeds, the oil pressure must not exceed 7.0 bar.

If the specifications are not met:

–	Check if the strainer in the oil suction pipe is dirty → Item.

Note

Insufficient oil pressure may also be caused by mechanical faults, e.g. damaged bearings.

If a fault is found:

–	Renew oil pump → Chapter.

If specification is exceeded:

–	Check oil channels.

–	If necessary, replace oil filter bracket with pressure relief valve.

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