I would adjust them as stated in Ted's description. Don't worry about hot or
cold at this point. The 275 cam likes the adjustment to be pretty close or
you will notice how the car runs. Once the engine warms up, check the valve
clearances and readjust to the specs given in his instructions. I have one
of these cams in my Midget and speak from first hand experience. I believe
Larry Macy has the same cam in his Midget and can give his .02 as well.
Dan
Dan Dwelley
(207) 941-5855
Dan.Dwelley@ps.ge.com
"The intuitive mind is a sacred gift and the rational mind is a faithful
servant. We have created a society that honors the servant and has forgotten
the gift."
- Albert Einstein.
-----Original Message-----
From ckotting at wideopenwest.com [mailto:ckotting@wideopenwest.com]
Sent: Thursday, March 20, 2003 7:14 AM
To: spridgets@autox.team.net
Subject: RE: Cold vs. Hot valve lash
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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