Keep hot coolant moving through the heater and bypass circuit with the Dayco Engine Coolant Bypass Hose / HVAC Heater Hose 87312, a pre-formed molded hose cataloged for the listed applications — including the 1993-1994 Chevrolet Corvette [V8-5.7L], 1998-2000 Chevrolet Metro [L3-1.0L], 1989-1993 Geo Tracker [L4-1.6L], 1991-1992 Mercedes-Benz 190E [L6-2.6L] and 1990-1992 Toyota Land Cruiser [L6-4.0L]. See the Buyer's Guide tab for the full list of 30 applications.
Molded to a set shape, it carries engine coolant through the heater and bypass path and is designed to replace an original hose that has hardened, cracked, swelled, or started to seep with age. This part is listed under both names — coolant bypass hose and HVAC heater hose.
Quantity needed varies by engine — most listed applications use one, while the Toyota Land Cruiser uses two. Manufacturer part number 87312.
This part cross-references / interchanges with the following part numbers:
What is the Dayco 87312?
It's a molded coolant bypass / HVAC heater hose that carries engine coolant through the heater and bypass circuit. It is listed under both names.
What size is this hose?
It has a 0.50 in inside diameter at both ends and a 12 in centerline length. It is a single molded hose.
Will it fit my vehicle?
It's cataloged for 30 applications, including the Chevrolet Corvette [V8-5.7L], Geo Metro [L3-1.0L] and Tracker [L4-1.6L], and Toyota Land Cruiser. Check the Buyer's Guide tab for your year and engine.
How many do I need?
Quantity varies by engine. Most listed applications use one, while the 1990-1993 Toyota Land Cruiser uses two. Confirm the count for your engine in the Buyer's Guide.
What are signs this hose may need replacing?
Common signs include coolant seepage or leaks, a hardened, cracked, or swollen hose, or a bulge near the ends. If a failed hose is the cause, this replaces it.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
