Thanks everyone, just read through the whole thing. Very good reminder of what to do / not do before I get my new rings.
Replacing Piston Rings......HELP Please.
Posted 03 January 2015 - 04:34 PM
I do mine 180 degrees of eachother if no spec is given by the ring manufacturer.
Also, a pair of ring pliers would be great , helpful for installing them without breaking them. Practice with the old rings to get used to handling them. While your in there replace bearings , there cheap and tighten up the clearances.
Posted 03 January 2015 - 05:33 PM
They also can't be facing along the length of the crankshaft or at 90 degrees to it. This leaves the top one at either of the four 45 degree angles and the second one 180 to that.
Posted 13 January 2015 - 05:33 PM
They used to use high tension rings, which are generally made of cast iron. This wears the block faster, and since the rings don't go up to the top of the cylinder, it leaves a ridge of unworn metal.
Most engines made after the mid eighties use low tension rings. You can compress th em fairly easily by hand. I forget what they are made of. I want to say CrMo.
The leaks are part of the anti-corrosion system.
1984 Nissan 720, 1988 Nissan Pathfinder