Coolant thermostat, removing and installing

WARNING: This page is about a different variant/trim than selected.

Removing

Drain coolant → Cooling System, Draining and Filling .

NOTE:

All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.
The coolant must be completely drained, otherwise there is a risk that coolant may leak into the intake channels.

Remove intake manifold upper part: → Intake Manifold Upper Section, Removing and Installing .
Remove intake manifold lower part: → Intake Manifold Lower Section, Removing and Installing .

Fig 1: Intake Manifold Lower Section Electrical Harness Connector

GW00029169

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector - arrow -.
Move electrical wiring clear.

Fig 2: Coolant Hoses, Thermostat Housing Bolts & Pipe Connection Bolts

GW00029214

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove coolant hoses - 2 - and - 3 -.
Remove bolt - 1 - and disconnect pipe connection at housing.
Remove bolts - arrows - and remove thermostat housing.

Installing

Installation is in reverse order of removal. Note the following:

NOTE:

Replace gaskets and O-rings.
Secure all hose connections using hose clamps appropriate for the model type .
During installation, all cable ties must be reinstalled at the same location.

Install intake manifold lower part: → Intake Manifold Lower Section, Removing and Installing .
Install intake manifold upper part: → Intake Manifold Upper Section, Removing and Installing .
Fill with coolant. → Filling under Cooling System, Draining and Filling

Tightening torques

Component	Nm
Coolant thermostat housing to cylinder block	8
Coolant pipe to coolant thermostat housing	8