Did not set ring end gap on kb107!!!
I BUILT MY 318 and neglected to set my end gap on my kb107s! the motor has about 7000 miles on it now. runs great, is there failure lurking soon??? Please help!
If it's really done 7000 miles you should be fine as long as it never overheats.
I would recommend taking the heads off to inspect the bores and check the pistons for damage to the top ring lands just in case.
if they fail. it is pretty nasty.
The ring ends touch and have no room to expand except to deflect up or down causing the ring lands to break off and get smooshed into the spark plugs, breaking them off too. The spark plugs then deposit their ceramic core into the bore which basically doesn't burn from the combustion heat and just stays in there until it ruins your bores.
while this happens there are little pieces of piston exiting through your car's exhaust, if you're lucky like I was they won't ruin your valve seats.
This all happened to me with KB399 pistons, but it wasn't caused by tight ring gaps, it was caused by detonation (loose distributor. way too much advance)
But in the event of a piston/ring failure the damage is basically going to be identical, regardless of the cause.
I'd also recommend not giving the motor a hard time (try to avoid prolonged wide open throttle.)