Radiator outlet hose OE LR144560 Water tank coolant hose for Land Rover Traction battery cooling pipe

Product Description:

Radiator coolant water hose

OE NO.: LR144560

Applicable vehicle type: For Land Rover

Radiator coolant hoses (also known as radiator hoses) are rubber hoses in a vehicle's cooling system that connect the radiator to the engine. They are used to circulate engine coolant (antifreeze) throughout the cooling system. Typically composed of inner and outer rubber layers (the inner layer being coolant-resistant synthetic rubber, the outer layer being anti-aging rubber material) along with a reinforcement layer, they offer excellent flexibility and pressure resistance. Common radiator hoses are categorized into upper and lower hoses: the upper hose connects to the engine's inlet port at one end and the radiator's upper chamber at the other, forming an engine “bottom-in, top-out” and radiator “top-in, bottom-out” cooling water circulation loop. Some vehicles also feature additional coolant hoses, such as heater hoses (connecting the radiator to the heater core for cabin heating), though their basic structure and function remain similar.

Over time, radiator coolant hoses may develop various faults. If not addressed promptly, these issues can lead to coolant leaks, engine overheating, or even severe damage. Common failure modes include:

• Coolant Leakage: Leaks may occur when hoses age or fittings loosen. Typical signs include coolant dripping from hose surfaces or joints, or coolant stains on the ground. Leaks reduce coolant levels, potentially causing engine overheating due to insufficient fluid. Inspect hoses for leaks if you notice abnormal coolant consumption or green, yellow, or orange fluid stains on the ground.
• Hose Bulging or Blistering: Prolonged exposure to high temperatures and aging can degrade the internal structure of rubber hoses, causing bulging or softened areas on the surface. Hose bulging is a dangerous sign indicating damage to the inner rubber layer. If it ruptures, it can lead to coolant leakage or hose collapse. Bulging typically occurs at bends or areas compressed by clamps. Replace damaged hoses immediately.
• Hose Cracks: Rubber gradually cracks due to UV exposure, ozone, and temperature fluctuations. Fine cracks may appear on the outer layer of coolant hoses, potentially causing coolant leakage. Stress concentration at bends and clamp locations makes these areas particularly prone to cracking. Replace hoses with visible cracks, even minor ones, to prevent expansion and leakage.
• Hose Loosening or Detachment: As hoses age, the rubber may become loose or lose elasticity, compromising the seal between the hose and its fitting. Under pressure or vacuum conditions generated during engine operation, the hose may loosen or detach from the fitting, causing coolant leakage and engine overheating. If any signs of loosening at the fitting are observed, the hose should be tightened or replaced promptly.
• Hose Collapse: The lower radiator hose, connected to the water pump inlet, experiences vacuum suction during pump operation. If the internal reinforcement spring deteriorates or breaks, the hose may collapse under vacuum pressure, obstructing coolant flow. This prevents proper coolant circulation, causing rapid engine temperature rise. Collapsed hoses typically become more noticeable during high-speed driving or high-RPM operation and may return to normal after engine cooldown. If hose collapse is detected, the hose must be replaced to prevent cooling system failure.
• Hose Overheating Damage:When cooling system malfunctions occur (e.g., thermostat failure causing excessive water temperature), coolant temperatures may abnormally rise beyond the hose's tolerance limit, leading to overheating damage. Overheated hoses become brittle and cracked on the surface, potentially rupturing under high temperatures. Additionally, prolonged operation in high-temperature environments accelerates hose aging.
• Hose Aging and Hardening: Rubber naturally degrades over time, manifesting as hose hardening and loss of flexibility. Aged hoses are prone to cracking or brittle fracture during temperature fluctuations. Regular inspection and replacement of coolant hoses according to the vehicle manufacturer's maintenance manual is generally recommended, as rubber gradually deteriorates and loses performance even if hoses appear visually intact.

Among the above issues, coolant leaks and hose cracking/bulging are the most common problems. If any of these abnormalities are detected in the hoses, prompt repair or replacement is essential to prevent severe consequences such as coolant loss and engine overheating.

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