[Mgs] setting valves after head machining / 1500 MGA

[The Roxter]

Paul Hunt wrote:
> They were to put a bit of bending torque on the rocker shaft to stop it
> twisting in use, and were only under the middle two pedestals of MGBs as a
> modification.  Someone must have taken a lot of material off the head and/or
> block for you to run out of adjustment if the valve seats aren't recessed,
> shimming the rockers would only put those back to where they were so I can't
> see a problem with that if it is the cause.  But whose to say the 'redoer'
> didn't recut the valve seats as well which would add to the issue?  Are you
> sure you have the right cam followers and push-rods?  Are they correctly
> seated?
Just a word of warning here. I once bought a cylinder head off eBay for my 67 Cooper S. Just a few miles down the road, I seriously holed a piston, totally ruining it and requiring an engine-out rebuild. Turned out the head had been decked radically and the compression ratio was over 14 to one. I fixed it by paying a racing shop to grind out the combustion areas on the head so the ratio was 10 to one and by replacing the ruined piston. That was an expensive lesson.

-The Roxter
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