Maintain proper engine coolant circulation with this Genuine Nissan Bypass “Question Mark” Hose, designed specifically for Nissan Patrol GQ Y60 models fitted with TB42S and TB42E engines. This OEM coolant bypass hose routes engine coolant between key components to ensure stable engine temperature control and consistent cooling system performance.

Over time, rubber coolant hoses can become hard, brittle, swollen, or cracked due to heat cycles, age, and constant exposure to coolant pressure. A failing bypass hose can lead to coolant leaks, air entering the cooling system, overheating, and reduced engine reliability, particularly under towing or off-road conditions.

Manufactured to genuine Nissan specifications, this direct-fit replacement restores correct coolant flow routing and sealing integrity, helping maintain reliable engine temperature control and long-term cooling system performance.

Features

• Genuine Nissan OEM part
• Suits Nissan Patrol GQ Y60 with TB42S and TB42E engines
• “Question mark” shaped coolant bypass hose
• Manufactured to factory Nissan specifications
• High-quality heat and coolant resistant rubber construction
• Designed for correct coolant flow routing and sealing
• Direct fit replacement, no modifications required
• Ideal for cooling system servicing and hose replacement

Benefits

• Maintains proper engine coolant circulation
• Helps prevent coolant leaks and overheating
• Restores factory cooling system performance
• Reduces risk of air pockets in cooling system
• Improves long-term engine reliability
• Withstands heat, pressure, and vibration
• OEM quality for accurate fitment and durability

Vehicle Fitment

Suitable for:

• Nissan Patrol GQ Y60 with TB42S carburettor engine
• Nissan Patrol GQ Y60 with TB42E EFI engine

Please confirm compatibility prior to purchase or contact us with your VIN to ensure correct fitment.

Common Signs of Wear

• Coolant leaks near thermostat or bypass hose area
• Cracks, splits, or brittleness in rubber hose
• Swelling or soft spots in hose body
• Engine overheating or fluctuating temperature
• Coolant smell from engine bay
• Visible coolant residue or staining
• Hose collapse under suction or pressure

Replacing a worn coolant bypass hose is essential for maintaining a sealed cooling system and ensuring stable engine temperatures in your Nissan Patrol GQ.