I'm sorry to say that I can't think of any scenario that would cause
that problem that doesn't involve pulling at least the head. It
sounds to me like either something is wrong with the cam / tappet or
the valve is recessing deeply in to the head or the head of the valve
is ready to come off. The straightedge across the valves seems to
largely rule out the last two scenarios. Best case is that something
fell into the tappet, the pushrod is sitting on top of it, and it can
easily be removed without further disassembly.
- Tony Drews
At 12:37 PM 4/3/2010, npaul72464@aol.com wrote:
> Hi All,
>
>I'm in the midst of adjusting the valves on my 1958 TR3A and have run into a
>snag. They all adjusted fine till I got to #8 where there is no gap and no
>turning of the screw will give me any. I checked compression (for some
>reason) and there's 150 PSI in all 4 cylinders. I pulled the rocker shaft and
>the rocker and push rod look normal compared with all the others. I put a
>straight edge across all the valve springs and they're all the same height.
>
>Any insights would be much appreciated.
>
>Ned Paulsen
>Webster, NY
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