So I’m just about finished with my valve adjustment and repair of cam oil feed line, when I noticed something.
According to an article on cams, the drive sprockets I have are not good. They are the middle one in the attached picture, and the article states: “ The Middle one is the one to watch out for as it tends to slip causing valves to get bent for as it does not have as many teeth and the teeth it has are spaced wider so have even less tooth to tooth contact. I have not been able to trace out a number for this from the Jaguar parts book. It seems to show up in the 1969 model year engines. Jaguar stopped using it after a very brief time and went to the four bolt configuration. If you have the scalloped 2 bolt ones on your engine, throw them away and replace them with the round ones.
So… how serious is this? Is it as bad as it sounds? Should i do something immediately or is this something that can be done later.
Also, what’s involved in replacing these?
Thanks for any input.