HomeBelts and Cooling > Hoses and PipesDayco 72805 Radiator Coolant Hose - Lower
Part #: 72805

Dayco 72805 Radiator Coolant Hose - Lower

Curved Radiator Hose, Lower
⚙️ 4 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Curved Radiator Hose, Lower
🚗Fitment: BMW, Z4
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Dayco Curved Radiator Hose 72805

The Dayco Curved Radiator Hose 72805 is designed specifically for BMW Z4 models, providing reliable coolant flow and engine temperature regulation. Constructed from durable EPDM material, this radiator coolant hose ensures long-lasting performance under demanding conditions.

  • Made from high-quality EPDM material for heat and chemical resistance
  • Black color with a protective sleeve for added durability
  • Curved single inside diameter hose with 1 7/16 inch inside diameter on both ends
  • Outside diameter of 2 inches on both ends for secure fitment
  • Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Trunk height of 15 1/2 inches for precise fitment

Details on the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose line is engineered to provide a precise fit and reliable coolant transfer for specific vehicle applications. This product line focuses on hoses with curved designs to accommodate complex engine bay layouts, reducing stress and improving coolant flow efficiency. The 72805 part is a single inside diameter hose featuring a protective sleeve to enhance resistance against abrasion and environmental factors.

Product Description and Specifications

This radiator coolant hose is constructed from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. The hose is black and includes a protective sleeve, which helps protect against wear and external damage. Both ends of the hose have an inside diameter of 1 7/16 inches and an outside diameter of 2 inches, ensuring a secure connection to the radiator and engine fittings. The hose complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive cooling systems. With a trunk height of 15 1/2 inches, it fits the BMW Z4 cooling system requirements precisely.

Compatible Applications and Common Issues Addressed

  • Compatible with BMW Z4 models requiring a curved radiator coolant hose
  • Replaces worn or cracked radiator hoses causing coolant leaks
  • Prevents overheating due to compromised coolant flow
  • Addresses hose swelling or softening from heat exposure
  • Eliminates coolant contamination from hose deterioration

Installation Notes and Tips

Ensure the engine is cool before removing the old radiator hose to avoid burns. Inspect hose connections and clamps for corrosion or damage and replace if necessary. When installing the Dayco Curved Radiator Hose 72805, verify that the hose is routed without kinks or twists to maintain proper coolant flow. Tighten clamps securely but avoid over-tightening to prevent hose damage.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 72805 to meet stringent SAE specifications, ensuring durability and performance in automotive cooling systems. The use of EPDM material and protective sleeve enhances the hose's lifespan under typical operating conditions. Warranty details are provided by Dayco and should be confirmed at the time of purchase.

BrandDayco
Part Number72805
PositionCurved Radiator Hose, Lower
MaterialEpdm
ColorBlack
End 1 Inside Diameter1 7/16
End 2 Inside Diameter1 7/16
Contains Heat ShieldN
Contains Protective SleeveY
End 1 Outside Diameter2
End 2 Outside Diameter2
Hose TypeSingle i.d. hose
SAE SpecificationSae j20r4 class d-1, sae j1684 type ec
Trunk Height15 1/2

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2004BMWZ42.5LL6LowerEarly; Curved Radiator Hose
2004BMWZ43.0LL6LowerEarly; Curved Radiator Hose
2003BMWZ42.5LL6LowerCurved Radiator Hose
2003BMWZ43.0LL6LowerCurved Radiator Hose

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.