Engine Heater Core Bypass Kit With Aluminum Fittings For 5/8 And 3/4 Inch Hoses

When a heater core develops leaks, clogs, or fails to deliver warm cabin air, this aluminum engine heater core bypass kit provides a direct pathway for coolant to circulate straight back to the engine block. By temporarily diverting flow away from the problematic chamber, the kit maintains optimal operating temperatures while allowing the cooling system to function under load. Engineered with corrosion-resistant aluminum fittings, it reliably handles thermal stress and connects securely to standard 5/8-inch or 3/4-inch rubber hoses found on most domestic and import vehicles.

Practical Uses & Installation Advice

• Streamlined Cooling Flushes: Bypassing the restricted heater chamber lets fresh coolant circulate faster, clearing residual sediment and old antifreeze efficiently.
• Diameter Confirmation: Verify your upper and lower heater hoses measure exactly 5/8" or 3/4" before trimming clamps to guarantee a leak-free seal.
• Air Bleeding Protocol: After installing the kit, idle the engine and periodically squeeze the hoses until the thermostat opens to fully evacuate trapped air pockets.

Technical Specifications

• Core Construction: Machined aluminum alloy with reinforced connection ports
• Hose Compatibility: Fits 5/8-inch and 3/4-inch internal diameters
• Finish: Silver metal barbs paired with black mounting hardware
• Shipped Dimensions: 15 × 9 × 5 cm
• Unit Weight: 245 grams

Package includes:

• 1 × Engine Heater Core Bypass Kit

Installation Reminders: Never open a pressurized cooling system while the engine is hot. Allow full cool-down, wear protective gloves, and verify clamp torque after the first drive cycle to prevent sudden coolant loss.

Hardware documentation and fitment guidelines are provided in English. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.