G1 Water Hose - Metal Pipe To Cylinder Head - 1.6 (EG), 1.8 (DX)

This coolant hose connects the metal coolant circulation pipe to the cylinder head coolant flange located above the gearbox on early VW 1.6 and 1.8 water-cooled engines. It is a critical link in the cooling system, carrying hot coolant away from the cylinder head and back into the main cooling circuit to regulate engine temperature.

Over time, original hoses often harden, crack, or swell due to heat cycling and coolant exposure—leading to leaks in a hard-to-spot area above the gearbox. Replacing this hose restores cooling system integrity and helps prevent overheating and coolant loss.

What the part does and how it works

Coolant exits the cylinder head via the outlet flange and passes through this hose into the rigid metal pipe that runs along the engine/gearbox area. From there, coolant continues through the system toward the radiator and heater circuit. Because this hose sits close to heat sources and is under constant pressure, it must be both flexible and durable—exactly what this original-spec replacement is designed to provide.

Construction & quality

• Material: NBR fabric-reinforced rubber

• Excellent resistance to heat, pressure, and modern coolants

• Precision-formed to the original factory shape

• Designed for a secure, leak-free fit without stressing adjoining pipes or flanges

Fitment details

• Position: Metal coolant pipe to cylinder head flange (above gearbox)

• Engine sizes: 1.6 – 1.8 water-cooled petrol engines

Compatible vehicles

• VW Golf Mk1 (1979–1983)

• VW Golf Mk1 Cabriolet (1979–1993)

• VW Scirocco (1979–1992)

• VW Jetta Mk1

Engine codes supported

• EG – 1.6

• JJ – 1.8

• DX – 1.8

• KT – 1.8

Recommended related parts

When replacing this hose, it’s good practice to check:

• Cylinder head coolant flange seal

• Metal coolant pipe condition (corrosion or pitting)

• Hose clips / clamps

• Fresh coolant/antifreeze