Dayco 88472 Engine Coolant Bypass Hose - Block To Thermostat or Pipe To Thermostat

Dayco Small I.D. Heater Hose for Toyota and Lexus

Dayco 88472 is an engine coolant bypass hose built for small I.D. heater hose applications where a direct-fit coolant connection is required. Made from EPDM and finished in black, it is sized with 3/4 in. inside diameter ends and built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications.

Compatible With Toyota Highlander, Lexus ES350, Lexus RX350, Lexus RX450h, Toyota Venza, Toyota RAV4, Toyota Camry, Toyota Sienna, and Toyota Avalon applications listed below, this hose supports pipe-to-thermostat and block-to-thermostat routing. Dayco 88472 is a practical OE-style replacement for cooling system service on select Toyota and Lexus vehicles.

Key Features

• EPDM construction for coolant hose service
• Black finish for a factory-style appearance
• 3/4 in. inside diameter at both ends
• Single I.D. hose design
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC standards
• Dayco Small I.D. Heater Hose product line

Detailed Description

This engine coolant bypass hose is part of Dayco’s Small I.D. Heater Hose line, which covers smaller-diameter coolant routing used in heater and bypass circuits. The EPDM rubber construction is suited for coolant exposure, while the 3/4 in. end sizing and 1 1/8 in. outside diameter dimensions support a secure connection in the specified applications. Dayco 88472 cross-references Toyota 16261-31050 and is also listed with ACDelco 14187S, CARQUEST 19670, Duralast B88472, Gates 19670, Goodyear 63081, and NAPA 11670 for the same application.

Fits 2008-2016 Toyota Highlander, Pipe To Thermostat; Fits 2007-2014 Lexus ES350, Pipe To Thermostat; Fits 2007-2014 Lexus RX350, Pipe To Thermostat; Fits 2010-2014 Lexus RX450h, Pipe To Thermostat; Fits 2009-2014 Toyota Venza, Pipe To Thermostat; Fits 2012 Toyota RAV4, Pipe To Thermostat; Fits 2006-2010 Toyota RAV4, Pipe To Thermostat; Fits 2011 Toyota Camry, Pipe To Thermostat; Fits 2007-2009 Toyota Camry, Pipe To Thermostat; Fits 2011 Toyota RAV4, Block To Thermostat; Fits 2007-2010 Toyota Sienna, Pipe To Thermostat; Fits 2005-2007 Toyota Avalon, Pipe To Thermostat.

Common Problems This Hose Can Address

• Cracked or hardened coolant bypass hose material
• Coolant seepage at a small-diameter heater hose connection
• Heat-related hose deterioration in the engine bay
• Loss of proper coolant routing between pipe and thermostat locations
• Service replacement for worn Toyota and Lexus heater hose assemblies

Installation Notes and Tips

Verify the hose routing, end diameters, and position before installation. This part is listed for pipe-to-thermostat and block-to-thermostat applications, so match the vehicle’s original routing exactly. Inspect adjoining pipes, clamps, and thermostat housing connections for wear or corrosion before installing the new hose.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R3 Class D-1 and SAE J1684 Type EC requirements for coolant hose applications. The material, sizing, and application coverage support direct replacement service on the listed Toyota and Lexus models, including Highlander, Camry, RAV4, and related vehicles.