1677352 3.15 mm Valve Adjusting Shim for Volvo FH12

What does a valve adjusting shim do?

This valve adjusting shim is a precision-ground component designed to bring valve clearance in diesel engines to the exact tolerance required by the manufacturer. It functions by adding specific thickness between the rocker arm or cam follower and the valve, ensuring the valve seats fully during every engine cycle. This precision is critical for maintaining engine timing and compression levels in heavy-duty applications.

Compatible vehicles and engines

This specific shim is compatible with Volvo FH12 vehicles equipped with D12D engines. It serves as a reliable replacement for original components, helping to prevent compression loss and ensuring the longevity of the valve seating face. For accurate fitment, always verify the thickness against the requirements of the specific engine code.

Installation and maintenance

When installing this shim, ensure that the contact surfaces are thoroughly cleaned and lightly lubricated to prevent scoring upon initial start-up. Technicians should measure each valve individually rather than assuming uniform clearance across all cylinders. It is recommended to check clearances at the intervals specified by the manufacturer to prevent premature wear of the valve train components.

Troubleshooting and selection

Proper maintenance of the valve train involves regular inspection of these shims to ensure they have not deformed or shifted due to high-pressure operation. Maintaining correct clearance helps prevent side loading on the valve stem and ensures smooth engine operation under heavy loads.

OE cross-reference

1300 05 024 (Valve Adjusting Shim Engine Valve) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 1677352.