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DAYCO 71320  
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DAYCO 71320 Specifications
Contains Heat ShieldN
Contains Protective SleeveN
End 1 Inside Diameter1 3/16 in.
End 2 Inside Diameter1 7/16 in.
Hose TypeDual I.D. Hose
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height15 1/2 in.

Designed to replace original equipment manufacturer hose, Dayco Molded Radiator and Bypass Hose is built with knitted reinforcement and EPDM construction which provides high strength and resistance to oil, mud, salt, road debris, ozone, coolants, and temperature variations of -40F (-40C) to +257F (+125C) that are required for OEM hose replacements.

Features & Benefits:
  • The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose.
  • Meets SAE J20R4 EC, Class D-1 requirements
Service Tip: Squeeze along the hose and feel for inconsistencies; replace any hose that is soft, spongy or crunchy.
Cooling System Maintenance | Tips & Tools

Without regular maintenance, cooling system components will degrade and fail prematurely, which can lead to costly engine damage. Protect your engine with simple preventative maintenance:

  • Completely drain and flush the system using Cooling System Flush prior to installation. Flushing the system is critical to prevent system contamination and failure.
  • Consider replacing the Thermostat and Radiator Cap as part of routine preventative maintenance. System contamination can cause these parts to degrade and fail over time, which can lead to severe engine damage from overheating.
  • Refill radiator with fresh Coolant / Antifreeze according to the volume and formula specified in your Owner's Manual. Inspect levels and condition every year.
Additional Resources

The Top 8 Reasons Coolant Hoses Fail
Hose Replacement Tips
Alternate/OEM Part Number(s): 52003801, 52003803, 52003946, 52003947, 52028025, 8952002095, 8952002935, 8952003240, 8952003801, H0061444

Warranty Information:
12 Months/12,000 Miles