Has anybody modified a timing cover so that the camshaft timing can be adjusted (advance/retard) without taking the whole timing cover off?
Here are some photos that I found on the net:
K engine:
T engine:
The face of the timing cover is slightly curved, so bolting a plate of aluminium might have issues with oil leaks. From the photos there is a raised edge between the timing cover and the plate. Not sure if it is welded or bolted from the inside of the cover. The raised bit can have a groove so that an o-ring can fit in. Probably the raised edge is so the plate bolts don't stick though to the inside of the timing cover, and hitting the timing gear.