[4sd911]

How much clearance should be between the valve guide and valve stem?
This is what I measured, these heads have 30,000 miles on them they are from a 2.7 CIS. Exhaust valves only measured at this point.

Ex. valve ------ stem ------- guide up/down ---- guide side ways
1 ------------- 0.351 ---------- 0.355 --------------- 0.354
2 ------------- 0.352 ---------- 0.355 --------------- 0.355
3 ------------- 0.351 ---------- 0.356 --------------- 0.354
4 ------------- 0.351 ---------- 0.356 --------------- 0.354
5 ------------- 0.351 ---------- 0.357 --------------- 0.354
6 ------------- 0.352 ---------- 0.356 --------------- 0.354

I'm using a dial caliper that measures to .001, for inside the guide I am using spring loaded T handle type then measure that with the dial caliper. I can see that there is some wear. Should these guides be replaced?