025-121-073E VW Vanagon Coolant Hose - 1.9L Wasserboxer 83-85

Coolant Hose – 025-121-073E

The 025-121-073E is a precision-molded coolant hose designed specifically for the early water-cooled Volkswagen Vanagon equipped with the 1.9L Wasserboxer engine. This hose is a critical component in the cooling circuit, responsible for maintaining the flow of antifreeze between the engine's coolant distributor and the cylinder heads. In the 1.9L cooling system, maintaining structural integrity is paramount to preventing air pockets and overheating—common issues that can lead to costly cylinder head seal failures.

Constructed from heavy-duty, fiber-reinforced EPDM rubber, the 025-121-073E is engineered to withstand the unique pressure requirements of the rear-engine cooling layout. It is resistant to heat, ozone, and chemical degradation from engine oil and coolant additives. Replacing aging or soft hoses with this factory-spec unit ensures that your cooling system remains pressurized and efficient, protecting your engine during long hauls and high-temperature operating conditions.

Detailed Vehicle Compatibility

VW Vanagon (1.9L):

• 1982, 1983, 1984, 1985

Engine Fitment Codes:

• DF (1.9L): 08/1982 - 07/1985

• DG (1.9L): 09/1982 - 07/1985

• DH (1.9L): 01/1983 - 06/1985

• EY (1.9L): 10/1984 - 07/1985

• GW (1.9L): 11/1983 - 07/1984

Product Highlights & Features

• Application Specific: Molded to the exact factory dimensions required to clear the 1.9L engine's intake and exhaust components without kinking.

• Reinforced Durability: Built with internal fiber braiding to prevent ballooning and bursts under the high-pressure conditions typical of the Vanagon cooling system.

• Long-Term Reliability: Resists hardening and cracking caused by constant thermal cycling, ensuring a long service life and a reliable seal.

Technical Specifications

• Part Number: 025-121-073E

• Material: Fiber-Reinforced EPDM Rubber

• Engine Type: 1.9L Wasserboxer (Flat-Four)

• Application: Engine Cooling System

Installation & Maintenance Tips

• Inspect Plastic Flanges: When replacing this hose, carefully inspect the plastic coolant flanges for warping or cracks. These early plastic parts often become brittle and are a common source of secondary leaks.

• Proper Sealing: Ensure the metal or plastic mating surfaces are completely clean of old rubber residue or corrosion before installing the new hose. A clean surface is essential for a leak-free fit.

• Bleeding the System: The 1.9L Vanagon system is sensitive to air. After installation, perform a full cooling system bleed using the radiator bleeder screw to ensure no air is trapped in the cylinder heads.

• Clamp Placement: Position the hose clamps approximately 1/4 inch from the end of the hose to ensure they are seated behind the flange barb for maximum security.

025121073E