Maintain reliable cooling system performance in your Nissan Patrol with this Genuine Nissan Bypass Hose, designed specifically for GQ Y60 models fitted with the TB42S engine. This OEM hose sits directly under the thermostat housing and forms part of the engine’s coolant bypass circuit, ensuring proper coolant circulation during warm-up and stable engine operating temperatures.

Over time, bypass hoses in this location commonly harden, crack, or split due to constant heat cycling, coolant exposure, and engine vibration. A failed hose can lead to coolant leaks, rapid fluid loss, overheating, and potential engine damage if not replaced promptly.

Manufactured to Nissan’s original specifications, this direct-fit replacement hose ensures correct coolant flow, secure sealing, and long-lasting durability in demanding on-road and off-road conditions.

Features & Benefits

• Genuine Nissan OEM bypass hose for precise fitment and reliability
• Designed specifically for Nissan Patrol GQ Y60 TB42S engines
• Located under the thermostat housing in the coolant bypass circuit
• Maintains correct coolant circulation during engine warm-up
• Helps prevent overheating and coolant loss
• Durable rubber construction for heat and pressure resistance
• Resistant to coolant, oil vapour, and engine bay contaminants
• Direct replacement with no modifications required
• Ideal for cooling system repairs and preventative maintenance

Vehicle Fitment

Suitable for:

• Nissan Patrol GQ Y60 – TB42S engine

Please confirm compatibility before purchase or contact us with your VIN for assistance, as cooling hose configurations may vary between carburettor and EFI variants.

Common Signs of a Worn Bypass Hose

• Coolant leaks under thermostat housing area
• Cracks, swelling, or soft spots in hose rubber
• Engine running hotter than normal
• Visible coolant residue around housing or block
• Sudden coolant loss without obvious radiator leak

Replacing a worn bypass hose helps maintain stable engine temperatures, prevents overheating, and ensures reliable cooling system performance in all driving conditions.