Heater hose internal diameter

[parisian62]

Is the internal diameter of heater hose for a grey 3/8"?

Thanks
Stewart

[Harv]

Stu,

The FB/EK Warmaride copper heater pipes are 16mm (5/8”) outside diameter. ½” heater hose will fit, but is very difficult to get in place (and doesn’t fill the firewall grommets very well). 5/8” heater hose is a much better option. To help ease the heater hoses on to the heater pipes and nipples, ensure the copper pipes and brass nipples are clean. Use a small smear of liquid dishwashing detergent to lubricate the copper pipes and brass nipples. Dip the heater hose ends into a coffee mug of hot water for half a minute to soften them up before sliding them on.

Cheers,
Harv

[parisian62]

Oooops 5/8..

Thanks andrew