The only thing that keeps the valves out of the pistons are the springs. The valves can't hit a spark plug, only the piston can. Something came apart inside and smashed the spark plugs. If your valve springs broke or wore out, the valves could hit the piston and then the piston chunks might have been able to hit the spark plugs. To have it happen on one cylinder sure. For it to happen on multiple cylinders....that is just nuts.
If you have a bad brake booster, the last few cylinders run lean and the pistons blow apart.
aka Mike D.----->Bio Page KDřGWY
“He who goes unarmed in paradise had better be sure that that is where he is.”—James Thurber
"Its better to be thought a fool rather than to speak up and remove all doubt." - Lincoln
pride is ego, the word I had lost was dignity. The quality or state of being worthy of esteem or respect.
Ptarmigan build thread - 95FZJ80