A valve shim is a disc of hardened metal of precisely calibrated height used to adjust the clearance between the back side of the cam-lobe and the valve on which it operates where the cam-lobe operates directly on the valve without an intermediate rocker arm.
The shim sits on top of the bucket which itself sits on top the valve-stem and moves up and down within a machined bore. While hydraulically self-adjusting valves are sometimes used for their lack of required adjustment they do not work well in engines capable of high RPMs. In situations like these shims are most often used.
Valve Clearance Shim - E4D-27255
Dimensions - 27 mm x 2.55 mm
To suit Nissan and Toyotaengines, further specific application information as follows:
Make – Nissan Engine model - CG13DE
Make – Nissan Engine model - GA16DE
Make – Toyota Engine model - 1UZ-FE
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