Normal piston have 2 compression rings and a 3 piece oil ring. Some aftermarket rings have a 2 piece zero-zap second compression ring to reduce blow-by.
The engine will be losing compression, and possibly burning oil. Check each cylinder to determine the compression. The loss could also be caused by a valve problem.
Low Compression usually means that the cylinder rings are worn. You should also do a leak down of each cylinder. That will pinpoint which cylinder/s are bad. Also,possible poor seating of valves or improper valve seat contact.
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.
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.
Add an ounce of engine oil in each cylinder on top of the piston and turn over a couple of times with the plugs out to lube and seal the rings.
Each piston will normally have 3 rings. If it is a V6 or I6 it will have 18 rings. A V8 will have 24 rings.
Is the oil lever OK ? Also get a compression check in each cylinder to see if one of the piston rings have worn out.
Sounds like when the engine was put together that the rings on the pistons are lined up wrong. There are 3 rings on each piston and they should 90 degrees apart, that should give you max compression.
Do a compression test on each cylinder looking for one that is significantly lower than the others.
Gently.Answer:Once the piston is removed from the bore the ring or rings are exposed. Each ring will have a gap or split in one place as it goes around the piston. This gap is spread open and the ring lifted off the piston.If you need to reuse these rings or the pistons they are for you use a special tool.If you don't care gloves are recommended and fingers will do the job.Careful! The rings can break when flexed like this and create flying sharp steel pieces!
Valve guides and/or valve seals can be worn. Allows oil to get into the combustion chamber.Oil consumption and smoking are signs of either bad piston rings or bad valve guides/valve seals.A compression check on each cylinder can help determine which.
Do a wet test. Remove all the spark plugs, disconnect coil wire from cap and ground it, remove fuel pump fuse or relay, squirt some motor oil into each cylinder and do another compression test. If there is substantially more compression in those previously low cylinders you probably have worn piston rings. If there is little change you probably have valve problems.