MTFCA Forum

Doing some valve work on my 26 and found these spacers between the top of the spring and the block. I do not believe these are factory and curious on their intended purpose. Thanks!

If they are not original equipment, they are probably valve spring shims intended to the extend the life of used springs by restoring original spring tension. Another possibility is that the engine has a performance cam installed and the shims were installed to allow the valves to better follow the more radical cam profile, especially at higher RPM.

Increases valve spring pressure. Commonly done on modern engines to maintain valve spring pressure after a valve job. Good original springs or new ones should be used. No additional spacer is needed for a T motor, even with a lower valve seat.