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Dayco 73030 Radiator Coolant Hose - Lower
| Brand | Dayco 73030 |
|---|---|
| Position | Lower |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 1 9/32 |
| End 2 Inside Diameter | 1 17/32 |
| Contains Heat Shield | N |
| Contains Protective Sleeve | N |
| End 1 Outside Diameter | 1 21/32 |
| End 2 Outside Diameter | 1 15/16 |
| Hose Type | Dual i.d. hose |
| SAE Specification | Sae j20r4 class d-1, sae j1684 type ec |
| Trunk Height | 12 1/2 |
| Product line | Curved Radiator Hose |
| Fits | Buick · 3 vehicles |
Curved hose design. Helps route coolant smoothly through the system.
EPDM construction. Offers dependable flexibility and resistance to heat and coolant.
Dual I.D. hose. Provides two inside diameters for a precise fit.
Curved Lower Radiator Hose for Buick Lucerne
Dayco 73030 is a curved radiator coolant hose built for lower cooling-system routing on select Buick Lucerne applications. It uses EPDM construction and a dual I.D. hose design to match the required connection sizes while maintaining a formed shape for proper fitment.
Fits 2009-2011 Buick Lucerne, lower. This Dayco Curved Radiator Hose is identified by part number 73030 and is specified for the lower radiator hose position on these vehicles.
Key Features
- EPDM rubber construction for coolant-system service
- Black finish
- Curved hose profile for lower radiator routing
- Dual I.D. hose design
- End 1 inside diameter: 1 9/32 in.
- End 2 inside diameter: 1 17/32 in.
- End 1 outside diameter: 1 21/32 in.
- End 2 outside diameter: 1 15/16 in.
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
Product Details
Dayco Curved Radiator Hose 73030 is formed to follow the lower coolant path and maintain the hose shape needed for a clean installation. The EPDM material is commonly used in radiator hose applications because it is suited to hot coolant exposure and everyday engine-bay conditions. For buyers searching for a lower radiator hose for 2009-2011 Buick Lucerne, this part number provides the specified fitment and hose sizing in one application.
The Dayco curved radiator hose line focuses on formed coolant hoses that match vehicle-specific routing and connection geometry. For Buick Lucerne cooling-system service, Dayco 73030 supports the lower hose location with the correct dual inside diameters and a molded curve rather than a universal straight hose.
Common Problems This Hose Can Address
- Cracked or split lower radiator hose
- Coolant leakage at the hose connection points
- Softening or swelling from age and heat exposure
- Incorrect hose shape on a lower radiator hose replacement
- Fitment issues when a formed hose is required for Buick Lucerne cooling service
Installation Notes and Tips
Verify the lower hose routing and connection diameters before installation. Inspect the radiator neck, engine outlet, and clamps for wear or corrosion, and replace damaged sealing surfaces as needed. Confirm the hose is seated fully and routed without twist or contact with nearby components. This part does not list a heat shield or protective sleeve.
Quality Assurance
This hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, supporting its use in radiator coolant applications. Confirm fitment against the vehicle’s lower hose configuration before installation. Part number 73030 is the reference for this Dayco curved radiator hose.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2011 | Buick | Lucerne | 3.9L | V6 | Lower | Curved Radiator Hose |
| 2010 | Buick | Lucerne | 3.9L | V6 | Lower | Curved Radiator Hose |
| 2009 | Buick | Lucerne | 3.9L | V6 | Lower | Curved Radiator Hose |
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