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Oilybits WVO / SVO Heat Exchange Hose

Product Information

Oilybits WVO, SVO, or Oil Heat Exchange Hose

Following extensive research into Heat Exchangers and having tried a few ourselves (including heated filters, plate heat exchangers and Heat Exchange Hoses like these), we have put together these excellent kits, with Annealed (Flexible) 316 Stainless Steel Capillary, and EPDM Coolant Hose

To see a video of this heat exchanger installed on a Landrover Defender, please scroll to the bottom....

Features / Benefits:

  • Simple to install
  • Simple to service or repair in the field
  • Extremely Versatile, can be cut to any length and bent around obstacles without special tools
  • Wide oil flow path, enables high flow even whilst coolant is still heating

Components Included:

  • 3/8"OD 316 Stainless Steel Capillary, for ultimate chemical resistance
  • EPDM Car Heater Hose, high quality hose for Ethylene Glycol coolants
  • 2x Nylon '66' Tees, Tefen brand
  • 2x 19mm-10mm Motorsport Grade Silicone Reducing Sleeves, tooled specifically for Oilybits
  • 8x High Torque Steel Clamps prevent drive screw slipping and associated leaks

The advantage of a Heat Exchange Hose is that, apart from the space occupied by the capillary, its coolant path is full bore along its length, therefore if your vehicle has a weak coolant pump, then it will not cause a restriction which would otherwise prevent it from heating oil effectively, unlike plate type heat exchangers which create a lot of resistance due to their narrow flow path

Designed for use in vehicles to heat fuel prior to it entering the fuel pump, the hose can be used to completely replace the entire fuel line from your fuel tank/s to your engine (ideal for protecting them from in-transit freezing in extreme conditions), or be used on a twin tank system downstream of a Pollak Fuel Tank Selector Valve to heat both Diesel and WVO/SVO/Bio Diesel to make both fuels thinner, thus more readily combustible, and increase your fuel efficiency, it will also prolong the life of your injectors which can fail if fuel if oil of too high a viscosity is pumped into them.

Our own experience of using this system on a 1.9 Peugeot XLD Saloon (Non Turbo) was that we attained 50 mpg on Diesel or WVO - 10% above the maximum efficiency stated by the manufacturer!

The Oilybits Heat Exchange Hose is flexible enough to bend lightly through your chassis from tank to engine due to the internal fuel pipe being made from an annealed (softened) 316 Stainless Steel, once in position, the tubes are cut to the desired length, the ends are terminated by tees, and a silicone reducing bush which enables the 3/8"OD 316 Stainess Steel Tube to exit the end of the 3/4" Nylon Tee. The hose ends are held on to the inserts by High Torque Hose Clamps - not Jubilee Clips which could damage hoses and strip their own drive threads during installation, leading to loosening and leaks after installation. Such leaks would be impossible to cure in the field without replacement clamps

The Oilybits Heat Exchange Hose is supplied with coolant by fitting inline to your heater matrix coolant supply hose (usually 3/4"/19mm ID) or other permanently flowing coolant hose, as close to the exit from the engine as possible. Once the Heat Exchange Hose is flooded, the coolant flows around the Stainless Steel innner pipe running through the entire length of the hose, and heat is rapidly conducted through the Stainless Tube wall heating the fuel inside it. The temperature of your coolant is likely to be around 85 celcius or higher, therefore ample to warm the fuel to the optimum temperature of 70+ celcius for combustion. When using on a twin tank Vegetable Oil System starting on Diesel, once your engine has reached its normal operating temperature - shown by the temperature gauge displaying "Normal" or with the needle in the green band, you can then (by means of a Fuel Selector Valve) select the Vegetable Oil source, automatically isolating the diesel line. You may find it useful to install a Pipe Clamp Thermometer to display the temperature of the Heat Exchange Hose, as some in-car temperature gauges only display temperature in green and red bands, not by degrees celcius

Hose reducing adaptors are available to reduce 3/8"ID (10mm) Fuel Hose to 5/16"OD (8mm) HERE

Hose reducing adaptors are available to reduce 3/4"ID (19mm) Coolant Hose to 5/8"OD (16mm) HERE

Additional lengths of EPDM Coolant Hose (per 1m) are available HERE or in the options below

Steel Spiral Reinforced, Clear PU Lined PVC, WVO / Bio Diesel hose in 3/8"ID (10mm) and 5/16"OD (8mm) is available HERE

Insulation jacket for the coolant hose can be found in the options below, this should be slid over the coolant hose during assembly to avoid splitting it

Specification
Coolant Tube Inner Diameter 19.0 mm
Coolant Tube Outer Diameter 27.5 mm
Coolant Tube Material Black EPDM, Cloth Reinforced, 110 Celcius Max Temp
Oil Tube Inner Diameter 8.00 mm
Oil Tube Outer Diameter 9.52 mm
Oil Tube Material 316 Stainless Steel (Annealed - Flexible)
Reducing Sleeve Material Motorsport Grade Silicone, 5mm Wall Thickness, 180 Celcius Max Temp
Tee Material Food Grade Nylon 66, 110 Celcius Max Temp
Active Percentage Entire hose is heated throughout
Length Various - Trim to final size
Oil Inlet / Outlet Fittings 3/8" OD Annealed 316 Stainless Steel Tube - Pushes directly into 3/8"ID Fuel Hose
Coolant Inlet / Outlet Fittings Nylon Hose Tails for 3/4" (19 mm) ID Coolant Hose
Maximum Assembly Pressure 5 Bar / 70 PSI (Suitable for all vehicle coolant systems)
Maximum Assembly Temperature 110 Celcius
High Torque Clamps Included 2x 20-22mm (Silicone Reducer to Steel Tube) 2x 29-31mm (Silicone Reducer to Tee) 4x 26-28mm (Coolant Hose to Tee)

Fittings detail

Showing 3/8"/10mmID Steel Reinforced PU Lined PVC Fuel Tube attached (not included)

We recommend using a mild solution of washing up liquid & water to aid the slipping of hose over the hose tails and the passing of the Stainless Tube through the Silicone reducer. If you need to make tight bends then a budget 10mm pipe bender will facilitate this, these can be found in the product options below

We are also able to supply the same exchanger with a 10mmOD Nylon capillary (7mmID), this is obviously much more flexible but does not conduct the heat so well, a longer length exchanger may therefore be required to gain the required level of heat transfer. Please email if Nylon is required, price is the same as the Stainless version

To monitor the temperature of the coolant in the Heat Exchanger we recommend the use of a Pipe Clamp Thermomer (not included)

To see how this heat exchaner is installed please view the following video.... particularly useful if you are converting a Landrover Defender, but the principle is the same for all vehicles

Product Options:

100 cm (£41.25)
125 cm (£43.75)
150 cm (£46.25)
175 cm (£48.75)
200 cm (£51.25)
300 cm (£61.25)
PARTS - Clamp 20-22 (Each) (£1.08)
PARTS - Clamp 26-28 (Each) (£1.08)
PARTS - Clamp 29-31 (Each) (£1.08)
PARTS - EPDM Hose (Meter) (£3.75)
PARTS - Insulation (2 Meters) (£3.33)
PARTS - Nylon Tube (Meter) (£2.67)
PARTS - SS316 Tube (Meter) (£2.67)
PARTS - Silicone Sleeve (Each) (£7.71)
PARTS - Tee Nylon 66 (Each) (£1.08)
TOOL - Pipe Bender (£8.33)

Product Code: HX002

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