ContiTech 63073 Molded Bypass & Heater Hose Engine Coolant Hose

The ContiTech 63073 is a precision-molded bypass and heater hose engineered to transfer glycol-based coolants to and from the heater core, through bypass circuits to the radiator, and across other components in the vehicle coolant system. Molded to match original equipment routing, this hose installs cleanly without cutting or kinking, delivering a reliable, leak-free fit.

Key Features:

• Dual-function design serves as both a molded bypass hose and HVAC heater hose
• Meets or exceeds SAE 20R3EC Class D1 and Class D2 specifications as well as many OE specifications
• Resistant to Electrochemical Degradation (ECR) for long service life in modern coolant systems
• Wide operating temperature range: -40°F to 275°F (-40°C to 135°C)
• End 1 Inside Diameter: 0.750 in. | End 2 Inside Diameter: 0.625 in.
• Constructed from high-grade rubber compound offering resistance to heat, oil, and underhood environments
• Pre-molded shape ensures proper routing and eliminates the need for bending or trimming

ContiTech molded heater hoses are a trusted OE-quality replacement solution, combining durable materials with exact-fit engineering for straightforward installation and dependable coolant system performance.