TRW Engine MK-9H Engine Valve Spring Retainer

Engine Valve Spring Retainer for Porsche and Volkswagen

TRW Engine MK-9H is an engine valve spring retainer built for applications that use a 9 mm valve stem diameter and a 3-notch/3-hole retainer design. It is listed for select Porsche 911, Porsche 944, Porsche 924, Volkswagen Vanagon, and Volkswagen Beetle applications, making it a fitment-specific choice for engine hardware service.

Key Features

• Engine valve spring retainer for valve train service
• Valve stem diameter: 9 mm
• 3 notches / holes number
• TRW Engine part number MK-9H
• Cross-reference part number: 616 105 411 00

Detailed Fitment and Application

Use TRW Engine MK-9H when servicing engines that require a 9 mm valve stem diameter retainer with the specified notch pattern. This part number is listed for 1970-1971 Porsche 911, 1975-1977 Volkswagen Beetle, 1980-1991 Volkswagen Vanagon, 1980-1994 Porsche 911, 1983-1989 Porsche 944, and 1987-1988 Porsche 924 applications. For buyers searching for Porsche 911 valve spring retainer, Volkswagen Vanagon engine hardware, or Porsche 944 valve train components, MK-9H provides a direct fitment reference by engine specification.

This part cross-references 616 105 411 00 for the same application.

Common Repair Uses

• Replacing a worn or damaged valve spring retainer during cylinder head service
• Restoring correct valve spring location in a 9 mm valve stem setup
• Addressing valve train noise or instability caused by retainer wear
• Supporting engine rebuild work on Porsche 911, Porsche 944, Porsche 924, and Volkswagen air-cooled or Vanagon applications

Installation Notes and Tips

Confirm the valve stem diameter is 9 mm before ordering. Match the 3-notch/3-hole retainer design to the original engine specification and verify all valve train components for wear before assembly. Because fitment varies by engine configuration, compare the part number and application details against the vehicle’s service information before installation.

Quality Assurance

TRW Engine parts are specified for application-based replacement, and MK-9H is cataloged with exact dimensional and fitment data to support accurate ordering for Porsche and Volkswagen engine service.