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How to change engine thermostat on VW GOLF III (1H1) – replacement guide
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Recommended replacement interval for the part category Thermostat : 50000 km
Important!
This replacement procedure can be used for:
VW GOLF III (1H1) 1.9 D, VW GOLF III (1H1) 1.9 TD, GTD, VW GOLF III (1H1) 1.9 TDI, VW GOLF III (1H1) 1.6, VW GOLF III (1H1) 1.8, VW GOLF III (1H1) 1.8, VW GOLF III (1H1) 1.8 Syncro (1HX1), VW GOLF III (1H1) 2.0, VW GOLF III (1H1) 1.6, VW GOLF III (1H1) 2.0 Syncro (1HX1), VW GOLF III (1H1) 1.9 TDI Syncro (1HX1), VW GOLF III (1H1) 1.9 TDI, VW GOLF III (1H1) 1.9 SDI … View more
The steps may slightly vary depending on the car design.
VW GOLF III (1H1) 1.9 D, VW GOLF III (1H1) 1.9 TD, GTD, VW GOLF III (1H1) 1.9 TDI, VW GOLF III (1H1) 1.6, VW GOLF III (1H1) 1.8, VW GOLF III (1H1) 1.8, VW GOLF III (1H1) 1.8 Syncro (1HX1), VW GOLF III (1H1) 2.0, VW GOLF III (1H1) 1.6, VW GOLF III (1H1) 2.0 Syncro (1HX1), VW GOLF III (1H1) 1.9 TDI Syncro (1HX1), VW GOLF III (1H1) 1.9 TDI, VW GOLF III (1H1) 1.9 SDI … View more
The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle
All the parts you need to replace – Thermostat for GOLF III (1H1) and other VW models
Alternative products

Torque wrench
Drive socket # 7
Drive socket # 10
Drive socket # 13
Ratchet wrench
Fluid container
Funnel
Fender cover
Replacement: engine thermostat – VW GOLF III (1H1). Tip from AUTODOC:
- Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
- Please note: all work on the car – VW GOLF III (1H1) – should be done with the engine switched off.
Carry out replacement in the following order:
- Step 1Open the hood.Step 2Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.Step 3
Unscrew the coolant reservoir cap. - Step 4
Prepare a container for fluids. - Step 5
Loosen the coolant hose clamp. Use a drive socket #7. Use a ratchet wrench. - Step 6
Detach the coolant hose. - Step 7
Drain the coolant from the engine.Replacement: engine thermostat – VW GOLF III (1H1). Tip:Caution! The coolant can be very hot.Wear gloves to prevent contact with hot liquid.All work should be done with the engine stopped.Wait until the coolant has completely flowed out of the drain hole. - Step 8
Unscrew the thermostat housing fasteners. Use a drive socket #13. Use a ratchet wrench. - Step 9
Remove the thermostat housing.AUTODOC recommends:Replacement: engine thermostat – VW GOLF III (1H1). Do not use excessive force when removing the part as this may damage it. - Step 10
Remove the thermostat.AUTODOC recommends:Replacement: engine thermostat – VW GOLF III (1H1). Do not use excessive force when removing the part as this may damage it.Caution! Coolant may leak out of the coolant lines and thermostat housing. - Step 11
Install a new thermostat.Replacement: engine thermostat – VW GOLF III (1H1). Tip:When installing, do not use excessive force to avoid damage to the part. - Step 12
Install the thermostat housing. - Step 13
Tighten the thermostat housing fasteners. Use a drive socket #10. Use a torque wrench. Tighten it to 13 nm torque. - Step 14
Attach the coolant hose.
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