Keep engine coolant moving where the heating system needs it with the Dayco Molded Heater Hose, part number 87312. It is listed for many models, among them the 1989-1991 and 1998-2000 Chevrolet Tracker (L4-1.6L), 1988-1991 and 1994-1995 and 1997-2000 Pontiac Firefly (L3-1.0L) and 1990-1993 Toyota Land Cruiser (L6-4.0L, L6-4.5L). It is a direct-fit replacement for the listed applications.
This molded hose carries engine coolant between components of the heating circuit. Depending on the application, it is cataloged for the heater-to-engine, heater-to-pipe, throttle-body-to-engine, heater outlet, intake-manifold-to-heater, or auxiliary heater to auxiliary heater pipe position.
Signs that a heater hose may need replacing include coolant seeping from the hose or its ends, a hose that feels soft, swollen or cracked, a dropping coolant level, or reduced cabin heat. These symptoms can have other causes, so inspect the cooling system before you replace parts. If the original hose is worn or leaking, 87312 replaces it. The listed applications use one hose, except the 1990-1993 Toyota Land Cruiser 4.0L or 4.5L, which calls for two.
See the Buyer's Guide tab for application details.
Interchange: 14287S · 16021M · 18424 · 18466 · 63255 · 4529 · 63256 · 10424 · 10466 · 303312
This part cross-references / interchanges with the following part numbers:
What does this HVAC heater hose do?
It carries engine coolant between components of the heating circuit, such as the engine and heater. The exact position depends on the vehicle.
What size is the Dayco 87312?
Both ends have a 0.50 in inside diameter, and the hose has a 12 in centerline length.
How many hoses does my vehicle need?
It is sold as a single hose. The listed applications use one, except the 1990-1993 Toyota Land Cruiser 4.0L or 4.5L, which calls for two.
Which positions is this hose cataloged for?
Depending on the vehicle: heater to engine, heater to pipe, throttle body to engine, heater outlet, intake manifold to heater, or auxiliary heater to auxiliary heater pipe.
What are signs a heater hose may need replacing?
Coolant seepage, a soft, swollen or cracked hose, a dropping coolant level, or reduced cabin heat may indicate a worn hose. Inspect the cooling system to confirm the cause first.
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.
