Type 25 Metal Water Pipe - Oil Cooler To Water Pump - 1986-92 - Waterboxer Engines

This replacement metal coolant pipe locates between the water pump and the oil cooler on 1900cc and 2100cc petrol Waterboxer engines fitted to VW Type 25 / T3 buses from 1985 onwards. It is the rigid link in this section of the cooling circuit, providing a durable, stable connection where rubber hoses alone would be prone to heat and fatigue.

On Waterboxer engines, the oil cooler is water-cooled and depends on a steady supply of coolant from the water pump. This metal pipe carries coolant from the pump to the oil cooler feed, ensuring consistent oil temperature control and reliable engine cooling. Unlike rubber hoses, the metal construction resists swelling, collapse, and degradation over time, making it ideal for this high-heat area of the engine bay.

What this part does and how it works

Coolant exits the water pump and flows through this metal pipe into the oil cooler, where heat is transferred from the engine oil to the coolant. The coolant then continues through the system. A straight, corrosion-free pipe here is essential for unrestricted flow, stable oil temperatures, and long-term engine reliability.

Fitment

• Vehicle: VW Type 25 / T3

• Years: 1985–1992

• Engines: 1900cc & 2100cc petrol Waterboxer

• Application: Water pump to oil cooler feed pipe (metal)

Engine code compatibility

• DG: 1.9 (02/85 – 07/86)

• SP: 1.9 (08/86 – 07/88)

• DJ: 2.1 (01/86 – 07/92)

• MV: 2.1 (08/85 – 07/92)

• SR: 2.1 (08/86 – 07/92)

• SS: 2.1 (08/89 – 05/92)

Fitting requirements (sold separately)

• 2 × 18.5mm hose clips: N10098001

Fitting notes / related parts

• Inspect the rubber hoses at each end and replace if perished

• Ensure the pipe seats fully before tightening the clips

• Check the oil cooler and water pump outlets for corrosion

• Refill with the correct coolant and bleed the system thoroughly after installation

A durable, OE-style metal coolant link pipe that helps maintain reliable oil cooling, consistent coolant flow, and long service life on 1.9 and 2.1 Waterboxer Type 25 / T3 buses.