Next the 410.....
KB356 which I told the machinist to hone for 3 1/2-4 thou skirt clearance, he said huh??
Being tuned in as I am to my motors perfomance I decided to do a leak down on it and found 22% on all cylinders.....
so I get into the motor and pop some valves out[due to hearing air leak out the pipes during the test] and find all the out of the package ferrea valves were out of round...owner of the shop says I ran it too lean, BUT the mix was not that lean..I mean stainless distortion point is like 2200* and the pistons melt at over 1200* so...nope to being too lean, it was a valve manufacture issue.
Well...then I get to the drivers side and find 3,5,7 all had the beginings of scuff but didn't smear or ruin the skirts and barely scrathed the upper exhaust side of the cylinder which is odd being I'm running the same oil I have in every other engine of mine for yrs now, the same oil petty driving experience runs in all their cup cars...
Even funnier is when I dropped the no.1 piston rod on my foot and then onto the shop floor...I dead blowed the skirt back into shape and installed it.....well guess what?
The no.1 piston is the only piston not to scuff on that bank....
I'll be sticking a bore gauge in it and see where it really is, then a hone, new rings, re grind on the exhaust valves and back together it go's.