Type 25 Water Hose Bundle Kit 1.9 DG 1986-92

This replacement rubber coolant hose connects the thermostat housing to the left-side metal water pump pipe on 1900cc and 2100cc petrol Waterboxer engines fitted to VW Type 25 / T3 buses from 1985 onwards.
On RHD models, the left-hand side is the passenger side.

This hose is a critical link in the main cooling circuit, carrying coolant from the thermostat into the metal pipe that feeds the water pump circuit. Any failure here can quickly lead to coolant loss, poor circulation, and overheating, making this hose an essential service item on ageing Waterboxer engines.

Manufactured from high-quality NBR fabric-reinforced rubber, this hose is precisely formed to the original factory shape and specification, ensuring correct routing, secure sealing, and long-term reliability under heat and pressure.

What this hose does and how it works

Coolant exits the thermostat housing and flows through this hose into the metal water pump pipe. The thermostat regulates flow based on engine temperature—restricting circulation during warm-up and allowing full flow once operating temperature is reached. A sound hose here ensures accurate thermostat operation, consistent coolant circulation, and stable engine temperatures.

Fitment

• Vehicle: VW Type 25 / T3

• Years: 1985–1991

• Engines: 1900cc & 2100cc petrol Waterboxer

• Location (RHD): Left side / Passenger side

• Application: Thermostat housing to metal water pump pipe

Engine code compatibility

• DG: 1.9 (08/85 – 07/92)

• DF: 1.9 (08/85 – 07/87)

• SP: 1.9 (08/85 – 07/89)

• MV: 2.1 (08/85 – 07/92)

• DJ: 2.1 (08/85 – 07/92)

• SR: 2.1 (08/85 – 07/92)

• SS: 2.1 (08/85 – 07/92)

Measurements

• Outer diameter: 44mm

• Inner diameter: 38mm

• Length: 95mm

Quality

• NBR fabric-reinforced rubber

• OE-correct moulded profile

• Designed to resist heat, pressure, and coolant exposure

Fitting requirements (sold separately)

• 2 × 47mm hose clips: N0164091

Fitting notes

• Always renew hose clips to ensure even clamping

• Inspect the thermostat outlet and metal pipe for corrosion

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

An essential cooling system hose for maintaining reliable coolant circulation, correct thermostat function, and long engine life on 1.9 and 2.1 Waterboxer Type 25 / T3 buses.

Replacement rubber water hose which is located between the hose junction and the thermostat housing on all Type 25 or T3 vans with 1900cc and 2100cc petrol engines from 1985 to the end of production

Quality: Good quality

Fitting:

2 x 32mm clips, see part number N0164041

Applications:

VW Type 25 or T3: 1985 – 1992

Replacement rubber water hose that connects to the upper inlet of the radiator on Type 25 or T3 buses fitted with petrol and diesel engines.

Quality: Good quality

Fitment:

• Diesel engines from chassis 24-F-060 001 onwards
• Petrol engines from chassis 24-G-000 001 onwards

Measurements:

• 660mm long
• 30mm ID on the small end
• 37mm ID on the wider end

Fitting:

1x 47mm clip, see part number N0164091

1x 40mm clip, see part number N0164101

Applications:

VW Type 25 or T3: 1983 – 1992

Replacement rubber water hose that connects the lower radiator outlet to the lower radiator return on all Type 25 or T3 buses from 1985 onwards.

Quality: Good quality

Measurements: 28mm ID + 33mm ID

Fitting:

 1x 47mm clip, see part number N0164091

1x 40mm clip, see part number N0164101

Measurements: 28mm ID + 33mm ID

Applications:

VW Type 25 or T3: 1985 – 1992

Water hose as used for the small pipe on the expansion tank 7mm x 2.5mm use as required.

Note: Sold per metre, cut to length.

Ensure leak-free coolant circulation in your VW T25 with this replacement rubber water hose, which connects the left-hand side cylinder head to the T-piece in the cooling system.

Designed for all 1.9 and 2.1 watercooled engines from 1986 to 1992, this hose is manufactured from durable, heat-resistant rubber and provides a precise fit for the following engine codes:

• EY, SP, DJ, MV, SR, and SS

This hose is a vital component of the cooling system and is prone to age-related cracking and softening. Replacing it during maintenance or engine work will help prevent overheating and coolant loss.

Fitment:

• VW Type 25 / T3 Bus: 1986–1992

• Engine Codes: EY, SP, DJ, MV, SR, SS

• Position: From left-hand cylinder head to T-piece

Quality: Good quality reproduction
Quantity: Sold each

Fitting Requires:

• 32mm hose clip – part number N0164041

• 14mm hose clip – part number N10254901

May Also Need:

• T-piece connector

• Coolant

• Additional water hoses or full hose kit

This replacement rubber coolant hose connects the water expansion (header) tank to the T-piece / bleed pipe on 1900cc and 2100cc petrol Waterboxer engines fitted to VW Type 25 buses from 1985 onwards. It is a vital part of the cooling system’s bleed and pressure control circuit, helping maintain stable coolant levels and efficient air removal.

On Waterboxer engines, the expansion tank manages coolant expansion as temperatures rise and provides a high point for air to be purged from the system. This hose allows coolant and trapped air to flow correctly between the expansion tank and the bleed circuit. If this hose becomes hard, cracked, or swollen, it can lead to coolant loss, poor bleeding, and overheating issues.

Manufactured from high-quality NBR fabric-reinforced rubber, this hose is moulded to the exact original shape and specification, ensuring a perfect fit, correct routing, and long service life even under constant heat and pressure.

What this hose does and how it works

As the engine warms up, coolant expands and excess pressure is managed via the expansion tank. This hose allows coolant and air to move between the tank and the bleed circuit, ensuring the system remains properly pressurised and free of air pockets. A sound hose here is essential for correct coolant circulation and stable engine temperatures.

Fitment

• Vehicle: VW Type 25 / T3

• Years: 1985–1991

• Engines: 1900cc & 2100cc petrol Waterboxer

• Application: Expansion (header) tank to T-piece / bleed pipe

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)

Quality

• NBR fabric-reinforced rubber

• OE-correct moulded profile

• Designed for long service life

Fitting requirements (sold separately)

• 2 × 23mm hose clips: N0164021

Fitting notes

• Always replace hose clips to ensure even clamping

• Inspect the expansion tank and T-piece for cracks or corrosion

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

An essential cooling system hose that helps keep your Waterboxer cooling system properly bled, leak-free, and operating at the correct pressure.

Replacement rubber water hose that connects the right cylinder head to the water distributor on all Type 25 or T3 buses except Syncro, from 10/1986 onwards fitted with 1900cc and 2100cc petrol engines

Quality: Good quality

Fitment: For use on models from Chassis 24-H-022 956 on

For the earlier one year only version from 08/1985 – 09/1986, see part number 251121130A

Fitting: 2x 32mm clips to fit, see part number N0164041

Applications:

VW Type 25 or T3: 1986 – 1992

This replacement rubber water hose connects the expansion tank to the metal water pump hose (025121081G) on all VW Type 25 (T3) Buses with 1900cc waterboxer engines built from 1985 onwards. It features the correct take-off connection to the carburettor, making it essential for maintaining your cooling system’s proper circulation and preventing overheating.

Manufactured to a good quality standard, this hose is designed to withstand heat, pressure, and coolant exposure, just like the original. It follows the factory routing and shape to ensure a clean, reliable fit with no modification required.

If your original hose is cracked, perished, or leaking, replacing it restores dependable coolant flow from the expansion tank to the water pump and maintains proper coolant return to the carburettor pre-heat circuit.

Fitting Notes:

• Includes take-off spout to connect to the carburettor

• You will also need the following clamps (sold separately):
  • 1 x 19mm clip (N0164011)
  • 1 x 27mm clip (N0164031)
  • 1 x 32mm clip (N0164041)

• Always fit with new clamps and check for leaks after installation

Applications:

• VW Type 25 / T3 Bus: 1985–1992 with 1900cc waterboxer engine

Quantity: Sold each
Quality: Good quality aftermarket replacement

Ensure reliable coolant flow with this replacement rubber water return hose, designed for all VW Type 25 / T3 Buses fitted with 1900cc and 2100cc Waterboxer engines.

This hose connects the coolant return line to the thermostat housing, playing a crucial role in maintaining engine temperature and proper circulation. Made from high-quality rubber, it resists pressure and heat, making it ideal for both daily use and restoration projects.

A perfect fit for 1.9 and 2.1 Waterboxer cooling systems, this hose is a must-replace item when servicing or refreshing the cooling system to avoid leaks or collapses under pressure.

Fitment:

• VW Type 25 / T3: 1983–1992

  • Engines: 1900cc (DG, DF, etc.) and 2100cc (DJ, MV, etc.) Waterboxer

  • Location: Return pipe to thermostat housing

Quality: Good quality rubber construction
Quantity: Sold each

Fitting Requires:

• 2 x 47mm hose clamps – Part number N0164091

May Also Need:

• Coolant thermostat housing gasket

• Fresh coolant

• Other coolant hoses or pipe sections if system is being serviced

Hose, return pipe to radiator from junction housing, 38 x 150mm, manual & auto models (chassis >24H022956)

Water hose / connector – Various uses:

Between pipe from Water-pump to block, behind pulley, 83-92.

Between thermostat housing to cyl-head, 83-85

Between header tank and T-piece (Lower) 4/83-85

This rubber water hose connects the front of the carburettor to the right-hand side of the intake manifold on all VW Type 25 (T3) Transporters fitted with 1900cc Waterboxer petrol engines (DG code), produced from February 1985 to July 1992. It forms part of the cooling and automatic choke circuit, circulating warm coolant between the intake manifold and carburettor to assist with fuel vaporisation and smoother cold starts.

Manufactured from high-quality rubber reinforced with a fabric lining, this hose offers excellent resistance to heat, pressure, and coolant chemicals. It maintains flexibility while providing a snug, leak-free connection between components — ensuring consistent engine performance and preventing coolant loss.

This replacement is designed to match the original Volkswagen specification, making it a perfect fit for both stock restorations and reliable daily drivers. Over time, the original hoses can become brittle or cracked, so replacing them is an important part of cooling system maintenance on Waterboxer engines.

Fitting Notes:

• Fits: VW Transporter T25 / T3 (1985–1992)

• Engine: 1.9 DG (Waterboxer petrol)

• Position: Front of carburettor to right side of intake manifold

• Function: Coolant hose (automatic choke to intake manifold)

• Material: Rubber with fabric lining

• Quality: OEM-style reproduction

• Cooling Hose: Intake manifold to engine

This coolant matrix heater hose is a direct replacement for the front feed hose that connects to the heater matrix under the dashboard on all VW Type 25 (T3) Buses equipped with 1.9 and 2.1 Waterboxer engines.

Designed to handle the high-temperature and pressure demands of the Waterboxer cooling system, this hose ensures proper coolant flow from the engine to the front heater matrix, providing efficient cabin heating even in colder weather. A deteriorated or leaking hose can lead to poor heating performance and potential coolant loss — replacing it with this high-quality reproduction helps maintain both reliability and comfort.

Manufactured from durable reinforced rubber, this hose resists cracking, swelling, and softening caused by coolant and heat exposure. It’s designed to fit perfectly within the tight confines under the T25 dashboard and follows the factory routing for an easy installation.

Fitment:

• VW Type 25 (T3) 1983–1992

• Engines: 1.9 Waterboxer (DG, DF, DH) & 2.1 Waterboxer (DJ, MV, SR, SS)

• Location: Front feed hose at heater matrix end (under dashboard)

Fitting Notes:
For best results, check the return hose from the heater matrix at the same time and replace if showing signs of wear or leakage. New hose clips or clamps are also recommended when fitting.

This coolant return hose connects the heater matrix to the coolant connector on all Volkswagen Type 25 (T3) Buses fitted with 1.9 and 2.1 Waterboxer petrol engines and 1600cc Diesel engines with CS engine codes.

Located under the dashboard at the heater matrix end, this hose forms part of the front heating circuit, returning coolant from the heater core back into the main cooling system. Over time, these hoses can become brittle or cracked due to constant exposure to heat and coolant pressure—leading to leaks or reduced heater performance.

This replacement hose is manufactured from high-quality, heat-resistant rubber and moulded to the correct shape for a perfect fit in the tight confines beneath the dash. It restores proper coolant flow through the heater system, ensuring efficient cabin heating and reliable cooling performance.

Features:

• Coolant return hose from heater matrix to connector

• Fits at heater matrix end (under dashboard)

• High-quality, heat-resistant rubber construction

• Correct shape and length for easy installation

• Direct replacement for original VW hose

Applications:

• VW Type 25 (T3) Bus: 1979–1992

  • 1.9 & 2.1 Waterboxer petrol engines

  • 1600cc Diesel engines (CS engine code only)

Fitting Notes:

• Fits front return line at heater matrix end under dashboard

• Does not fit JX or KY diesel engines

• Always inspect and replace both feed and return hoses for best results

This engine coolant hose connects the water port on the left-hand side of the inlet manifold (passenger side on RHD models) to the thermostat housing on 1.9 petrol Waterboxer engines fitted to Type 25 / T3 buses. It is a direct replacement hose, formed to the exact original shape and specification for correct routing, sealing, and long service life.

On 1.9 Waterboxer engines, this hose is a key link in the cooling circuit, allowing coolant to flow between the inlet manifold water passage and the thermostat housing. The thermostat then regulates coolant flow based on engine temperature, ensuring the engine warms up quickly and maintains a stable operating temperature. Any weakness or leakage in this hose can lead to coolant loss, poor temperature control, and potential overheating.

Manufactured from high-quality NBR fabric-reinforced rubber, this hose is designed to withstand:

• Continuous exposure to heat and coolant

• Internal pressure from the cooling system

• Engine movement and vibration

The reinforced construction and correct moulded shape ensure a perfect fit, proper clearance around surrounding components, and long-term reliability—ideal for both daily use and restored vehicles.

What this hose does and how it works

Coolant exits the inlet manifold via the water port and flows through this hose to the thermostat housing. When the engine is cold, the thermostat restricts flow to help the engine reach operating temperature quickly. As the engine warms up, the thermostat opens and allows full circulation to the radiator. A sound hose here is essential for accurate thermostat operation and consistent cooling performance.

Fitment

• Vehicle: Type 25 / T3

• Years: 1982–1992

• Engine: 1900cc petrol Waterboxer

• Location (RHD): Left-hand side of inlet manifold = Passenger side

Engine code compatibility

• DG: 1.9 (01/83 – 07/85)

• SP: 1.9 (08/86 – 07/89)

• DF: 1.9 (08/82 – 07/92)

• EY: 1.9 (10/84 – 07/89)

Fitting notes / related parts

• Always check hose clips and replace if corroded or weakened

• Inspect the thermostat housing and manifold outlet for corrosion

• Recommended to replace during cooling system servicing or when renewing the thermostat

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

A critical cooling system hose, manufactured to OE shape and quality, helping keep your 1.9 Waterboxer engine running at the correct temperature and leak-free.

Feed hose from the engine bay to heater valve for all T25/T3 vans with a 1.9 + 2.1 petrol engines and 1.6 turbo diesel models.

3357mm long

Return hose from the heater matrix to engine for all T25/T3 vans with a 1.9 + 2.1 petrol engines and 1.6 turbo diesel models.

3820mm long