ACDelco 18221L molded branched heater hose in black for coolant and air transfer
ACDelco 18221L molded branched heater hose in black for coolant and air transfer

ACDelco Professional 18221L Molded Heater Hose, Black | GM OE Style, -40°F to 275°F

ACDelco 18221L Molded Heater Hose — engineered for tight engine bays The 18221L hose is built to...
Vendor: ACDelco
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ACDelco 18221L molded branched heater hose in black for coolant and air transfer

ACDelco Professional 18221L Molded Heater Hose, Black | GM OE Style, -40°F to 275°F

£92.01
ACDelco 18221L molded branched heater hose in black for coolant and air transfer

ACDelco Professional 18221L Molded Heater Hose, Black | GM OE Style, -40°F to 275°F

£92.01
Description
Description
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ACDelco 18221L Molded Heater Hose — engineered for tight engine bays

The 18221L hose is built to fit today’s compact engine compartments, delivering a GM OE-style molded shape that blends with original components. A protective sleeve helps preserve the profile and spacing of nearby lines, supporting a clean, secure installation even in crowded areas.

Key design and fit advantages

  • Protective sleeve replicates GM OE design for proper fit and function
  • Installs without buckling, bending out of shape, or straining at connections
  • Has the same core coolant hose features for interchangeable applications
  • Diameter ranges from 1/4" to 1" to accommodate multiple vehicle types
  • Less than 500 part numbers cover more than 1,200 applications to maximize coverage
  • Precise dimensions listed for accurate fit in constrained spaces

Material strength and operating range

Made from a proprietary EPDM rubber blend, the hose remains flexible across temperature swings, helping resist electrochemical degradation that can shorten hose life. It is rated for -40°F to 275°F (-40°C to 135°C), enabling use in coolant, water, and air pathways. Marine applications are approved, expanding where it can be applied. Important: not suitable for fuel or oil transfer.

  • EPDM formulation offers durability and resilience in varied climates
  • Suitable for coolant circuits, heater lines, and air transfer paths
  • Marine-grade approval supports additional installation scenarios

Installation experience and practical use

The molded design is crafted to minimize installation time by reducing the risk of kinking or distortion during routing. In crowded engine bays, its precise shape helps you align hoses quickly with the original routing. This makes it a solid choice for replace-and-refresh projects on compatible GM vehicles.

Whether performing routine maintenance, responding to aging hose symptoms, or updating to a GM OE-style part, this hose provides a reliable, replaceable option. While results vary with vehicle and operating conditions, the 18221L offers a credible balance of fit, flexibility, and coverage for many applications.

FAQ

Q: What applications does the ACDelco 18221L hose support?

A: Compatible with coolant, water, and air systems, with marine approval and GM OE-style fit.

Q: What installation features help during replacement?

A: A protective sleeve, buckling-resistant design, and smooth bends aid straightforward, reliable installation in tight engine bays.

Shipping & Return
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You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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