INFINAUTO Heater Hose Connector 3/4 in to 5/8 in — 2-Pack OEM-Style Reinforced Hard Plastic, Includes Metal Clamps

INFINAUTO HVAC Heater Hose Connector is a direct-fit replacement fitting that joins a 3/4" hard tube to a 5/8" heater hose on many Ford and Lincoln trucks and vans.

If your vehicle is showing coolant seepage around the heater core hoses or the old plastic connector has become brittle, this OEM-style INFINAUTO connector restores a reliable seal and coolant routing. Manufactured from reinforced hard plastic and supplied with metal clamps, the two-pack matches OE numbers such as E69Z18D434B/800404 and fits a wide range of Ford and Lincoln models from the late 1980s through 2011. The part is designed to be swapped in without extensive modification and helps prevent leaks that affect cabin heating and engine cooling performance.

Which vehicles and model years will this connector fit?

This connector covers many Ford and Lincoln platforms where the factory used the 3/4" tube to 5/8" hose junction. Always verify your OE part number or physical connector dimensions before ordering to ensure compatibility.

• Fits: Ford Excursion 2000; Expedition 1997–2007; Ranger 1987–1989.
• F-Series: F-150 1987–2008, F-250 1987–2000, F-350 1987–1993.
• Econoline/Club Wagon/E-Series: E-150/E-250/E-350 1999–2011 variants and E-450/E-550 Super Duty units.
• Lincoln models: Aviator 2003–2005, LS 2001–2002, Navigator 1998–2007.

How does this connector restore heater hose performance?

The connector provides a secure junction between the metal heater tube and the rubber heater hose, maintaining coolant flow through the heater core. Replacing a cracked or flattened connector prevents coolant loss and restores proper heat transfer to the cabin without needing a major HVAC overhaul.

• Re-establishes sealed coolant routing to and from the heater core.
• Reduces risk of coolant leaks that can lower heating efficiency.
• Supplied metal clamps lock hoses to the connector for a firm connection.
• Replaces brittle OEM plastic with durable hard plastic construction.

What tools and steps are required for installation?

Installation is straightforward for anyone comfortable with basic cooling-system work. You may need to drain some coolant or clamp hoses to limit spills, and in some cases the old connector must be cut off if it is seized to the hose.

• Drain or clamp coolant lines to minimize fluid loss.
• Remove the old connector—cutting may be necessary if corroded or stuck.
• Push new connector onto tube and hose, then tighten the supplied metal clamps.
• Refill coolant and bleed air from the system per factory procedure.

Why replace both connectors and when should you consider new hoses?

Shipping two connectors and clamps encourages replacing both sides to maintain balanced performance and avoid future failures. If hoses show cracking, soft spots, or heavy swelling, swap them at the same time to prevent repeat repairs and ensure long-term leak-free service.

• Package includes two connectors and two metal clamps for both heater lines.
• Replace hoses if they are older than a few years or show visible damage.
• Changing both sides cuts labor time and reduces chances of a second failure soon after.

Who is this for: Technicians, DIY mechanics, and fleet owners seeking an economical, OE-style replacement for heater hose junctions on compatible Ford and Lincoln models. Choose this INFINAUTO kit when you need a reliable connector that matches OE fitment numbers, comes with clamps, and installs with common hand tools to stop coolant leaks and restore heater operation.