OE Quality
60-Day Returns

Dayco 77138GL Engine Coolant Bypass Hose - Left
Reliable Engine Coolant Bypass Hose for Various Vehicles
The Dayco 77138GL engine coolant bypass hose is designed to provide dependable performance in automotive cooling systems. This hose is engineered to maintain proper coolant flow and temperature regulation, essential for vehicle engine health.
- Durable construction for long-lasting service
- Designed as an engine coolant bypass hose
- Part of the Dayco Straight Radiator Hose - H.D. product line
- Compatible with multiple vehicle makes and models requiring a straight radiator hose
- OEM-quality fit and function with part number 77138GL
About the Dayco Straight Radiator Hose - H.D. Product Line
The Straight Radiator Hose - H.D. line from Dayco focuses on heavy-duty radiator hoses designed to withstand demanding engine cooling conditions. This product line emphasizes durability and consistent coolant flow, making it suitable for vehicles that require reliable bypass hose solutions. The 77138GL part is a key component within this line, engineered to meet specific cooling system requirements.
Product Details and Application
The Dayco 77138GL engine coolant bypass hose is constructed to facilitate efficient coolant circulation around the engine, preventing overheating and maintaining optimal operating temperatures. While specific vehicle fitment is broad, this hose is commonly sought for applications involving straight radiator hose replacements in various makes and models. The part number 77138GL ensures compatibility with systems designed for this type of bypass hose.
Common Issues Addressed by This Hose
- Coolant leaks due to worn or cracked bypass hoses
- Engine overheating caused by restricted coolant flow
- Reduced engine performance from improper coolant circulation
- Premature hose failure under high-temperature conditions
- Replacement of deteriorated or damaged radiator bypass hoses
Installation Notes and Tips
When installing the Dayco 77138GL hose, ensure the cooling system is fully drained and the engine is cool to avoid injury. Verify the hose routing matches the original configuration to maintain proper coolant flow. Inspect clamps and adjoining components for wear and replace as necessary to secure a leak-free connection.
Quality Assurance and Warranty
Dayco manufactures the 77138GL hose to meet industry standards for durability and performance. While specific warranty details are not provided, Dayco products typically undergo rigorous quality control to ensure reliability in automotive cooling applications.
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.