>OK ... now just what the %$#^^*&$%##$^ does "on rock" mean ... can it
>actually be defined??
>
On the rock refers to the procedure used by very frustrated shadetree TR
mechanics when they just can't get those %$#^^*&$%##$^ valves adjusted. In a
pique of fury, the head is torn from the offending engine, the valves
snapped from their mounting, hurled into a pile on large flat rock and
pounded to twisted mass of steel with a second rock. Anger assuaged, the
would be mechanic can now take the innoperative vehicle to a professional TR
service to have new valves installed and, in the process, properly adjusted.
Caution is advised when using this method of valve adjustment not to get
your fingers "between the rocks" as damage, both directly to fingers and
collaterally to anything within striking range, may be considerable.
cheers
Scott
PS. a few misinformed individuals seem to think that "on the rock" refers to
the crank position when the exhaust valve of the cylinder in question are
just about to close and the intake valve of the same cylinder are just in
the process of opening, hence both rocker arms are applying pressure to the
valves. The cylinder 360 crank degrees (180 cam degrees) from the cylinder
"on the rock" will thus be on the opposite side (non lifting) of the cam and
both its valves will be fully seated. As any true TR mechanic who has used
the true "on the rock" method will clearly recognize, this latter definition
is obviously utter poppycock and will not produce nearly as effective a
result.
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