My 1HDT is currently out on the stand for a refresh. I checked the valves and all were quite tight. Exhaust were mostly around .30mm and intake were .10-.12mm for the most part. Not particularly surprising at 200k miles and likely never touched. Since they all need to be adjusted I plan on just removing the cam, doing the math, shuffle a few/order the rest, and replacing them all at once.
My question is: What should I aim for? The wide end of the spectrum or dead in the middle? I assume these tend to tighten up with age like most shim valves.
My question is: What should I aim for? The wide end of the spectrum or dead in the middle? I assume these tend to tighten up with age like most shim valves.