1997 FORD F25. THIS WAS THE SECOND SPARK PLUG TO BLOW OUT OF HEAD. FIRST REPAIR COST $450.00, THIS TIME IT COST ME MY TRUCK, 2 CAMERAS, GPS, LAPTOP COMPUTER AND SEVERAL OTHER ITEMS AS THE TRUCK COUGHT ON FIRE WHEN SPARK PLUG HIT FUEL INECTION RAIL AN STARTED A FUEL FIRE THAT BURNT THE TRUCK TO GROUND. TOTAL LOSS. BURNED MY HANDS TRYING TO SAVE ITEMS IN CAB. HAD A FIRE EXTINGUISHER, BUT HIGH PRESSURE FUEL LINES SPRAYED FIRE TO FAST. MY GIRL FRIEND, HER DOG, AND I HAD 30 SECONDS TO GET OUT. IN 2 MINUTES THE CAB WAS ENGULFED IN FLAMES. I WILL BE DISMANTLING THIS ENGINE AS I AM A MECHANIC AND MACHINIST AND PLAN TO PROVE THERE WERE NOT ENOUGH THREADS SECURING SPARK PLUGS IN THEE ALUMIN UM HEADS. THERE WERE STANDARDS OUTLINED FOR MACHINING THREADS.*AK