VW MK4 Golf Jetta GLI GTI TT 337 1.8T Cast Aluminum Coolant Flange Upgrade Kits

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VW MK4 Golf Jetta GLI GTI TT 337 1.8T Cast Aluminum Coolant Flange Upgrade Kits

This is a complete kit of all the parts that commonly fail to cause coolant leaks on 1.8T engines. Replace these plastic parts with these Aluminum Cast parts for years of trouble-free use.


Mates to all the factory hoses for a perfect OEM fitment. Includes new O-Rings and FREE Hardware to change out when swapping in your new Cast Aluminum parts.

Kit Includes:

  • Cooling Hose Flange, Mk4 1.8T (Cast Aluminum)
  • Coolant T-Fitting, Mk4 1.8T (Cast Aluminum)
  • Thermostat Housing Cover, Mk4 1.8T / 2.0L (Cast Aluminum)
  • Water Distribution Pipe, Mk4 1.8T / 2.0L (Cast Aluminum)
  • 1 x Paper Gasket For Head Flange
  • 1 x Rubber O-Ring For Block Flange
  • 1 x Coolant Temperature Sensor O-Ring
  • 1 x Coolant Retaining Clip
  • 2 x Screws + 2 x Washers
  • Parts are also available by themselves.
Fits: 2000-2005 Mk4 Golf/Jetta 1.8T, 2000-2002 Audi TT


Fitment for the 2000+ 1.8T Automatic Transmission will require the removal of the adapter plate on the head of the engine where the flange with the coolant temperature sensor sits.

Does not fit ANY New Beetles
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