Coolant Thermostat

WARNING: This page is about a different car, the 2010 Volkswagen Jetta and 2009 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

T Bar and Socket 10 mm 3185
Refractometer T10007
Hex Ball Socket T10058
Torque Wrench (5-50 Nm) V.A.G 1331
Drip Tray for VAS 6100 VAS 6208
Hose Clip Pliers 6362

Removing

-- Drain the coolant. Refer to DRAINING AND FILLING .

-- Remove the throttle valve control module -J338-. Refer to INTAKE MANIFOLD AND ATTACHMENTS OVERVIEW .

-- Remove the coolant hose from the connecting piece.

-- Loosen the bolts -4- for the connecting piece -3- using the T bar and socket 10 mm 3185, and remove using the hex ball socket T10058. Remove the connecting piece -3- with the coolant thermostat -1-.

Fig 1: Identifying Coolant Thermostat, Connecting Piece And Bolts

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Rotate the coolant thermostat -1- 90° (1/4) to the left and remove it from the connecting piece -3-.

Installing

Install in reverse order of removal. When doing this note the following:

Always replace seals, sealing rings and O-rings.

-- Lubricate the new O-ring -2- with coolant.

Fig 2: Identifying Coolant Thermostat, Connecting Piece And Bolts

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Insert the coolant thermostat -1- into the connecting piece -3- and turn it 90° (1/4) turn to the right.

NOTE:

The clip of the thermostat must be positioned at approximately a right angle.

-- Position the connecting piece -3- with the coolant thermostat -1- to the cylinder block.

-- Tighten the bolts -4- using the T bar and socket 10 mm 3185.

Tightening specification: 15 Nm.

-- Install the coolant hose to the connecting piece.

-- Install the throttle valve control module. Refer to INTAKE MANIFOLD AND ATTACHMENTS OVERVIEW .

-- Fill with coolant. Refer to DRAINING AND FILLING .