Archie J. Lopez wrote:
> 
> have you folks heard about the condition which causes burning of the
> valves due to loose valve guides, caused by "poor octane" ratings in the
> fuel being made today? I cannot beleive that a Machine shop cant STOP all
> guides from getting loose with design, or rollpins or taper pins. You can
> make a 21 inch gun breech gas proof in any condition whats so hard about
> an 85 mm bore under much less compression? Can you clear up my
> understanding of the problem?
> 
> Archie   at dukbush@aa.net

Hello Archie.

How many miles you got on the heads? EVERY VW with 50K can use a valve job, 
with new guides.

I'm sure your VW sees a lot more use than your 21" gun. If you fire your gun 
as much as your VW, how long would it last and stay tight?

Douglas