need more information on valves and guides

[twigworker]

Although several folks tried to help, I never did get a definitve answer on the issue of the distance from the upper head surface to the valve stem tip with a decent seat being present.

As some might recall, this is a late TR3 head that had the heck machine out of the valves seats. As a result some of the valve stems stick up nearly to the stratosphere.

As a work around I have decided to just install new seat inserts and grind them to spec and try to keep them all about the same depth. That should give me a pretty workable tip height, but before I do that I have to deal with the guides.

The factory manual goes into great detail about stem to guide clearances and spring heights, but it says nothing, at least that I can find, about the installed guide height.

This head has it's guides pressed in all over the place. One is so high that the spring keeper bashed into it and the push rod was bent. I dare say that NONE of them are the same.

Does anybody have the spec for the guide installed height?

As usual, any help will be appreciated. Jack

 

[Deleted member 8987]

The machine shop tells me there is no installed stem height with adjustable valves, installed spring height is what you need to know.
Outer spring fitted length is 1.560". You don't need to know inner, as you won't be able to measure it without removing the outer spring. 38# pressure, fitted, inner is 33#
Dave

 

[TR3driver]

Should be the same as the TR4:

 

[TR3driver]

BTW, this is the manual information on the valve seats (which they call inserts). As you can see, it matches what I told you : flush with the surface.