Home » Chevy LS Engine Heater Core Bypass Hose, Thickened EPDM Rubber

Chevy LS Engine Heater Core Bypass Hose, Thickened EPDM Rubber

SKU: 1005010007964187-black
Color
€28,51
-38% €45,62 €28,51

Upgrade and simplify your Chevy LS engine cooling system with the Chevy LS Engine Heater Core Bypass Hose in thickened EPDM rubber. This custom-molded U-shaped bypass hose is designed to install on the LS water pump and loop the heater hose lines, giving you a reliable coolant bypass when you don’t need heater operation, during maintenance, or while diagnosing the cooling system. Built for GM Chevrolet and Pontiac all LS and LT series engines from 98-up, it accommodates both 5/8" and 3/4" heater ports for a secure, leak-free fit.

The thickened EPDM rubber construction delivers excellent resistance to oil, coolant, and fuels, while remaining easy to clean and long-lasting under engine bay conditions. The hose ends are molded to accommodate a 5/8" port on one side and a 3/4" port on the other, ensuring a straightforward installation on compatible LS Gen 3/4/5 engines.

Benefits & Tips

  • Simple installation with a dedicated U-shaped design that reliably routes coolant away from the heater core, reducing flow restrictions and potential leaks during maintenance.
  • Durable, oil- and coolant-resistant EPDM material stands up to the harsh conditions of the engine bay while remaining flexible enough for easy positioning.
  • Versatile use for diagnostic work or heater-core service on 98-up LS, LT Gen 3/4/5 engines with 5/8" and 3/4" heater ports—replacing a brittle or worn bypass hose with a single, reliable part.

Product specifications

  • Material: Thickened EPDM Rubber
  • Finish: Oil, Coolant and Fuel-Resistant
  • Origin: Mainland China
  • Hose ends ID: One end 5/8", other end 3/4"
  • Application: For GM Chevrolet Pontiac all LS, LT series 98-up LS LT GEN 3 4 5 Engine with 5/8" and 3/4" heater supply and return ports
  • Package includes: 1 x "U" hose, 2 x Stainless steel clamps

Package includes:

  • 1 x "U" hose
  • 2 x Stainless steel clamps

Warnings/Reminders

  • Ensure the engine and cooling system are completely cool before installation.
  • Verify port sizes: one end is 5/8" and the other is 3/4" to match your LS LT Gen 3/4/5 engine.
  • Use the included stainless steel clamps for a secure, leak-free seal.
  • Check that the bypass hose routing does not interfere with other hoses or components in the engine bay.

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