Crash -
They do loosen when hot. As the hot metal expands, the
pushrods stay relatively cooler than the block and head. As
the distance between the camshaft and the rocker shaft
increases, the length of the pushrods increases less, making
the valves looser.
However, that being said, I'd just set them at factory "hot"
spec, even though the engine is cold. At the first start
up, you've got to run it for at least 30 minutes to get the
cam and tappets bedded in together (assuming you're using
new ones), which is going to make the valve lash change
anyway.
You're not going to do any damage in 30 minutes of running,
and you're going to have to readjust the valves after that
initial bed-in anyway, and the engine will be at operating
temp at that point. So just figure that things will be a
bit rough at first, and do a complete valve lash - balance
carbs - set mixture after that first run-in.
At least that's how I've always done it.
> I don't think so, do you think they will looser when hot?
> Maybe add ..02?
> Crash
>
> Chris:
>
> minus .02
>
>
>
>
> Cap'n. Bob
>
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