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Dayco 87785 HVAC Heater Hose - Heater Outlet or Heater To Engine
| Brand | Dayco 87785 |
|---|---|
| Position | Heater Outlet |
| Color | Black |
| End 1 Inside Diameter | 5/8 |
| End 2 Inside Diameter | 5/8 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R3 Class D-1, SAE J1684 Type EC |
| Trunk Height | 17 |
| Product line | Small I.D. Heater Hose |
| Fits | Buick and Pontiac · 22 vehicles |
EPDM construction. Built for dependable HVAC hose performance.
Single I.D. hose. Provides a consistent 5/8-inch flow path.
SAE J20R3 Class D-1. Meets recognized hose performance standards.
Cross-references ACDelco 16251M, ACDelco 18249L and CARQUEST 19097 for the same application. See all 14.
Dayco Small I.D. Heater Hose for HVAC Service
Dayco 87785 is a small inside diameter heater hose built for heater circuit service in select Buick, Pontiac, and Honda applications. Made from EPDM and finished in black, it uses a 5/8 in. inside diameter at both ends for a direct replacement style connection in heater outlet and heater-to-engine routing.
The Dayco Small I.D. Heater Hose line focuses on heater hose applications that require consistent coolant transfer through compact routing. Part number 87785 is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC, supporting the material and performance requirements commonly used in HVAC heater hose service.
Key Features
- EPDM construction for heater hose use
- Black finish for a clean OE-style appearance
- 5/8 in. inside diameter at both ends
- Single I.D. hose design for small-diameter routing
- Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
- Compatible with heater outlet and heater-to-engine positions
Fitment Details
- Fits 2000-2005 Buick LeSabre, Heater Outlet.
- Fits 2000-2005 Buick Park Avenue, Heater Outlet.
- Fits 2000-2005 Pontiac Bonneville, Heater Outlet.
- Fits 1996-1999 Buick Riviera, Heater To Engine.
For buyers searching for a heater hose for 2000-2005 Buick LeSabre heater outlet service or a 1996-1999 Buick Riviera heater-to-engine hose, Dayco 87785 matches the listed applications. It also cross-references ACDelco 16251M and Gates 19097 for the same application.
What It Is Used For
- Replacing a cracked or heat-aged heater hose
- Restoring coolant flow between the engine and heater circuit
- Addressing leaks at small-diameter heater hose connections
- Servicing heater outlet routing on Buick LeSabre, Park Avenue, and Pontiac Bonneville
- Servicing heater-to-engine routing on Buick Riviera
Installation Notes and Quality
Verify the hose routing, inside diameter, and connection points before installation. This hose uses a 5/8 in. I.D. at both ends and does not include a heat shield or protective sleeve. Dayco identifies this hose under part number 87785 for the listed HVAC heater hose applications.
Dayco specifies this hose to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater hose service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2005 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2005 | Pontiac | Bonneville | 3.8L | V6 | Heater Outlet | Small I.D. Heater Hose |
| 2004 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2004 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2004 | Pontiac | Bonneville | 3.8L | V6 | Heater Outlet | Small I.D. Heater Hose |
| 2003 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2003 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2003 | Pontiac | Bonneville | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2002 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2002 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2002 | Pontiac | Bonneville | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2001 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2001 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2001 | Pontiac | Bonneville | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2000 | Buick | LeSabre | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2000 | Buick | Park Avenue | — | — | Heater Outlet | Small I.D. Heater Hose |
| 2000 | Pontiac | Bonneville | — | — | Heater Outlet | Small I.D. Heater Hose |
| 1999 | Buick | Riviera | — | — | Heater To Engine | Small I.D. Heater Hose |
| 1998 | Buick | Riviera | — | — | Heater To Engine | Small I.D. Heater Hose |
| 1997 | Buick | Riviera | — | — | Heater To Engine | Small I.D. Heater Hose |
| 1996 | Buick | Riviera | — | — | Heater To Engine | Small I.D. Heater Hose |
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