8mm (5/16") Blue Silicone Heater Hose

8mm (5/16") blue silicone heater hose (part SILHH08) is a small bore hose for coolant overflow, heater tap feeds and expansion tank lines, and for the tidy signal runs that motorsport and 4WD builds tend to need. Silicone holds its properties through heat cycling where rubber hardens and splits, which is why it is specified on vehicles and plant that cannot afford a coolant failure.

Key features

• Nominal inside diameter 8mm (5/16")
• Meets or exceeds SAE J20R1, Class A
• Temperature range -55°C to +180°C
• High performance silicone with one ply polyester fabric reinforcement
• Ozone resistant and oil splash resistant
• Corrosion resistant and stable through repeated heat cycles
• Sold by the metre
• Not suitable for fuel or oil transfer

Applications

• Coolant overflow and expansion lines
• Heater tap and bypass feeds
• Boost and vacuum signal lines
• 4WD and marine engine bays
• Small engine and generator cooling

Compatibility and fitting

• Sized on inside diameter: 8mm hose fits a 8mm spigot or outlet
• Use a smooth band or T-bolt clamp from the clamp range; silicone is softer than rubber and a perforated band can bite the wall
• For fuel lines use SAE 30R7 fuel hose, not silicone
• Matching silicone clamp kits are in the silicone hose range

Will it take a hose clamp without collapsing?

It will, and it should have one. Silicone is softer than rubber, so use a smooth band or lined clamp rather than a perforated one, and do not over tighten it.

Sizes from 6 mm to 25 mm are in the blue silicone heater hose range.

Dispatched from our Brisbane warehouse. Australia-wide delivery, or collect from the warehouse once your order is confirmed ready.