Kevlar Bottom Hose with Heater BN4-BJ8

Hand-made in the UK from Kevlar-reinforced rubber. This bottom radiator hose suits Austin Healey BN4 to BJ8 models where a bottom hose with heater take-off is required. The reinforced rubber is chosen to cope better with temperature fluctuations than standard hoses, and the heater take-off is re-engineered with a brass fixing to reinforce a common weak point at the small pipe joint.

Key Benefits

• UK made – produced from Kevlar-reinforced rubber (K suffix).
• Heater take-off version – for cooling layouts that feed heater plumbing from the bottom hose.
• Brass-reinforced heater joint – strengthens the small pipe connection where leaks can develop.
• Chosen for durability – designed to cope better with temperature fluctuations than standard hoses.

Will this fit my car?

Fits: Austin Healey BN4, BN6, BN7, BT7, BJ7 and BJ8 where the cooling layout uses a bottom hose with heater take-off.

Excludes: BN1 and BN2. Not suitable for BN4-BJ8 cars that use the no heater take-off bottom hose configuration. Not suitable for non-standard cooling conversions that change hose routing or connection sizes.

What’s Included

• 1 × Bottom radiator hose with heater take-off (Kevlar-reinforced rubber)

Which hose clips can be used?

Main radiator hose ends:

• Jubilee type radiator hose clip (wide adjustment range)
• O.E. double wire radiator hose clip (more original look)

Heater take-off joint (1/2 inch):

• Jubilee type 1/2 inch heater hose clip
• O.E. double wire 1/2 inch heater hose clip

Also Available

• Top Hose: CHT111K
• Bottom Hose: CHT113K
• Castrol Anti-Freeze: LUB250

Fitting notes and limitations

• Confirm the car uses the heater take-off bottom hose configuration before ordering.
• Inspect radiator and engine spigots for corrosion or pitting that can prevent sealing.
• Check the heater take-off connection and ensure the hose is fully seated before tightening the 1/2 inch clip.
• Tighten clips evenly and recheck after the first full heat cycle.