TOYOTA 11328-17040 Timing Belt Cover Gasket

The genuine Toyota 11328-17040 timing belt cover gasket (Gasket, Timing Belt / Gear Cover) provides a precise, reliable seal between the timing case cover and the engine block. Its primary function is to protect the timing drive components from external contamination (dust, mud, water) and to prevent internal oil mist and lubricant from leaking out of the engine block.

Technical Specifications

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number: 11328-17040
• Designation: Timing belt cover gasket (Gasket, Timing Belt / Timing Gear Cover)
• Fitting Position: Engine block front face / timing cover
• Associated Engine Configurations: 4.2 TD (1HD-FT, 1HD-FTE)

Vehicle Compatibility

• Toyota Coaster (B40/B50) 4.2 TD [1999 - 2004] (GASKET, TIMING GEAR OR CHAIN COVER (1HDFT))
• Toyota Land Cruiser 100 (J100) 4.2 TD [1998 - ...] (GASKET, TIMING GEAR OR CHAIN COVER (HDJ100, 1HDFTE))
• Toyota Land Cruiser 70 (J70) 4.2 TD [2001 - 2007] (GASKET, TIMING GEAR OR CHAIN COVER (HDJ70, 1HDFTE))

Technical Description and Failure Symptoms

During engine operation, the timing cover gasket is exposed to continuous thermal and vibrational stress. Over time, the sealing material loses its elasticity and plasticity, becoming hardened and developing microscopic cracks. Typical symptoms of failure include oil seepage or leaks along the mating surface of the cover, as well as dirt and dust accumulation on wet areas. Whenever the timing system is serviced or the timing cover is disassembled, replacing the gasket is essential to ensure an optimal hermetic seal.