Four Seasons 38642 A/C Orifice Tube - Front

Four Seasons 38642 Orifice Tube Overview

Four Seasons 38642 is a standard A/C orifice tube for automotive HVAC systems that use a fixed flow restrictor. With a yellow body and a .062 in. orifice diameter, it helps regulate refrigerant flow through the evaporator circuit for consistent cooling performance. This Orifice Tube line is a direct-fit service part for a wide range of Audi, Volvo, Buick, Chevrolet, GMC, Pontiac, Cadillac, Oldsmobile, and Volkswagen applications.

Key Features

• Brand: Four Seasons Orifice Tube line
• Part number: 38642
• Yellow color identification for service reference
• Standard style A/C orifice tube
• .062 in. orifice diameter
• Designed for expansion device service in automotive HVAC systems
• Cross-reference example: Monroe Shocks & Struts 182261

Detailed Description

The Four Seasons 38642 orifice tube is used in A/C systems that meter refrigerant through a fixed restriction rather than a thermal expansion valve. Its .062 in. opening and standard construction make it a practical replacement when servicing the evaporator feed on vehicles such as the Audi A4, Audi A6, Volvo S40, Volvo V50, Chevrolet Malibu, and Pontiac Grand Am. The part number 38642 is also referenced across multiple aftermarket catalogs for the same application.

Four Seasons identifies this part for normal climate use under 105°F, with a severe-duty option noted for hotter conditions. The product line is built for vehicles that require an orifice tube style expansion device, including many 1990s through 2013 import and domestic platforms.

Vehicle Fitment

• Fits 2008-2013 Volvo C30, N/A
• Fits 2006-2013 Volvo C70, N/A
• Fits 1998-2004 Volvo C70, N/A
• Fits 2005-2011 Volvo S40, N/A
• Fits 2005-2011 Volvo V50, N/A
• Fits 2009-2010 Audi A6, N/A
• Fits 1995-2004 Audi A6, N/A
• Fits 2009-2010 Audi A6 Quattro, N/A
• Fits 1995-2004 Audi A6 Quattro, N/A
• Fits 1996-2009 Audi A4, N/A
• Fits 2009 Audi A4 Quattro, N/A
• Fits 1996-2004 Audi A4 Quattro, N/A
• Fits 2001-2005 Audi Allroad Quattro, N/A
• Fits 2000-2005 Buick LeSabre, N/A
• Fits 2002-2005 Chevrolet Astro, Front
• Fits 2004-2005 Chevrolet Classic, N/A
• Fits 2001-2005 GMC Safari, Front
• Fits 2004-2005 Pontiac Bonneville, N/A
• Fits 1999-2005 Pontiac Grand Am, N/A
• Fits 1998-2005 Volkswagen Passat, N/A

What It Helps Address

• Restricted or uneven refrigerant flow in an A/C system
• Poor cooling performance from a worn or contaminated orifice tube
• Service replacement during evaporator or condenser repairs
• HVAC diagnosis on Audi A4, Audi A6, Volvo S40, and related applications
• Restoration of proper A/C metering in fixed-orifice systems

Installation Notes

Verify the vehicle uses an orifice tube style A/C system before installation. Match the replacement to the original tube style and climate guidance noted by Four Seasons: standard use under 105°F, with a severe-duty option recommended for hotter climates. Confirm the application against the vehicle’s HVAC layout, especially on Audi and Volvo models where fitment varies by year and platform.

Quality Assurance

Four Seasons supplies HVAC service parts across a broad range of OE-style applications, and this 38642 orifice tube is cataloged for direct replacement use in confirmed fitments. The part number 38642 is listed with multiple cross-reference numbers in the aftermarket for the same application.