Do a compression test on each cylinder looking for one that is significantly lower than the others.
big hammer
Oil on the outside of the spark plug is normally a sign of a leaking valve cover gasket. Oil on the spark plug electrode, (plug must be removed to see this oil), is normally a sign of a broken or worn piston ring. A compression test will verify if a ring is worn or broken.
Burnt, bent, broken valvepiston or ring damage,Burnt, bent, broken valvepiston or ring damage,
maybe ring piston broken
You have to disassemble the entire engine, remove the piston and check the rubber ring around that piston.
Seriously worn piston rings and more than likely a broken oil ring.
bent valve, burnt valve, stuck valve, broken piston ring, cracked piston, cracked head, blown head gasket.
The DNJ ring spec. information, printed on each compression ring (located next to the piston ring gap), is installed facing the top of the piston for both the top (#1) and middle (#2) compression piston ring slots. The oil control ring can be installed just like any other oil control ring in the bottom (#3) piston ring slot.
a piston ring is not calibrated. You just slide the new one in place
the knocking is a broken piston rod or piston ring broke it will be from $550-$1k to have it replaced. u need to have it checked out ASAP
The DNJ ring spec. information, printed on each compression ring (located next to the piston ring gap), is installed facing the top of the piston for both the top (#1) and middle (#2) compression piston ring slots. The oil control ring can be installed just like any other oil control ring in the bottom (#3) piston ring slot.
Oil fumes in the crankcase are common. Excessive oil fumes can be an indication of a broken or worn piston ring.