TOYOTA 17278-17010 Turbocharger to Exhaust Manifold Gasket

The genuine Toyota OEM turbocharger gasket with part number 17278-17010 provides a gas-tight seal at the mating surface between the exhaust manifold and the turbocharger turbine housing. The gasket plays a critical role in optimal turbocharger system operation by preventing high-pressure, hot exhaust gases from escaping before driving the turbine wheel. It is engineered specifically for Toyota's 4.2-liter inline-six diesel engine families (1HZ, 1HD-FT, 1HD-FTE), guaranteeing an exact fit and factory-standard durability.

Technical Features and Functions

• Part Type: Exhaust manifold to turbocharger gasket (Gasket, Turbo to Exhaust Manifold)
• Manufacturer: Toyota (Genuine OEM part)
• Material: High-temperature and high-pressure resistant metal alloy engineered to withstand continuous thermal cycling and vibration
• Installation Position: Between the exhaust manifold and the turbine inlet
• Design: High-strength, blowout-resistant construction to maintain a hermetic seal under extreme operating temperatures

Significance and Symptoms of Wear

The exhaust-side turbo gasket operates continuously under extreme thermal and mechanical loads. Aging, damage, or blowout of the gasket leads to direct exhaust leakage, reducing the exhaust gas energy reaching the turbocharger turbine. As a result, boost pressure buildup is delayed (increased turbo lag), engine power drops, and fuel consumption increases.

Common symptoms of failure include:

• Sharp whistling or hissing noise from the engine compartment during acceleration
• Visible soot accumulation around the turbocharger and exhaust manifold mating flange
• Noticeable exhaust odor in the engine bay or entering the cabin through the ventilation system
• Loss of boost pressure and reduced engine responsiveness in the low-to-mid RPM range

Vehicle Compatibility

• Toyota Coaster (B40/B50) 4.2 D [1995 – 1996] (Engine code: 1HZ)
• Toyota Coaster (B40/B50) 4.2 TD [1999 – 2004] (Engine code: 1HDFT)
• Toyota Land Cruiser 100 (J100) 4.2 TD [1998 – 2002] (Chassis code: HDJ101, Engine code: 1HDFTE)
• Toyota Land Cruiser 70 (J70) 4.2 TD [2001 – 2007] (Chassis code: HDJ70, Engine code: 1HDFTE)
• Toyota Land Cruiser 80 (J80) 4.2 TD [1995 – 2001] (Chassis code: HDJ80, Engine code: 1HDFT)