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Replace a Leaking Heater Hose

Save money on your next heater hose repair by replacing just the leaky hose instead of the whole assembly. All you need is a rotary tool and a new hose.

By the DIY experts of The Family Handyman Magazine

Cut out the leaking piece

Leaky, crimped-on heater hoses can be replaced with new, expensive assemblies. But you can replace just the leaky section for a fraction of the price. It's simple and cheap to do with a short matching length of hose and a new worm-drive clamp. (You should reuse the factory spring clamp, but you can't reuse the old crimp ring.) Check with a local auto parts store to locate replacement molded hose sections. Or bring in the leaking section and see if the staff can visually match it to a stock hose for another vehicle.

If you can't find the proper molded hose, slide a reshaping coil over a straight section of hose and bend it to the proper angle for your application. The coil will maintain the angle and prevent the hose from collapsing at the bend.

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Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

    • 4-in-1 screwdriver
    • Hacksaw
    • Rags

You'll also need a rotary tool with a cutoff wheel.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

    • Heater hose
    • Worm-drive clamp
    • Reshaping coil

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Replace a Leaking Heater Hose

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