Volkswagen Workshop Service and Repair Manuals > Golf Mk5 > Power unit | 4-cylinder diesel engine (2.0 l engine, 2-valve, TDI) | Engine cooling | Parts of cooling system

Removing and installing thermostat

Special tools and workshop equipment required

t	Refractometer -T10007-

t	Drip tray -V.A.G 1306-

t	Spring-type clip pliers -VAS 5024 A-

t	Cooling system charging unit -VAS 6096-

t	Adapter -V.A.G 1274/8-

t	Torque wrench -V.A.G 1331-

Removing

Note

Always renew seals and gaskets.

–	Drain coolant → Chapter.

–	Remove alternator → Electrical system; Rep. Gr.27.

–	Pull coolant hose off connection.

–	Remove securing bolts -1- of connection -2- and remove connection -2- with thermostat -4-.

–	Turn thermostat -4-¹/₄ turn (90°) to left and remove it from connection -2-.

Installing

Installation is carried out in reverse order, note the following:

–	Moisten new O-ring -3- with coolant.

–	Insert thermostat -4- into connection -2- and turn ¹/₄ turn (90 °) to right.

Note

The brace on the thermostat must be almost vertical.

–	Insert connection -2- with thermostat -4- in cylinder block.

–	Tighten securing bolts -1- to 15 Nm.

–	Fill coolant system with coolant → Chapter.

Volkswagen Workshop Service and Repair Manuals