SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder Gasoline direct injection engine, 2.0 liter turbo 4V, mechanics | Engine cooling | Components of the cooling system

Thermostat at bypass

Thermostat at bypass - installation diagram

1 -

Clip

2 -	Lower element on the case

3 -	Work element

4 -

Spring

5 -

O-ring

6 -	Upper element on the case

Checking the thermostat at bypass:

–	Removing the work element → Item

–	Heating the work element in a bath of coolant.

Opening begins: ca. 75 °C

Opening begins: ca. 85 °C

Opening stroke: ca. 5 mm

Position for fitting the thermostat at bypass:

Thermostat at bypass for the gear oil cooling circuit:

The arrow on the lower element on the case points to the heating heat exchange.

Thermostat at bypass for the turbo-charger cooling circuit:

The arrow on the lower element of the case points to the coolant circulation pump -V50-.

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