Oil Passing By Rings

Mike Pearson · 11-26-2007, 10:37 PM

Rick,

You should have 15 lbs of drag on the piston with the oil rings installed. If you can install the piston without a ring compressor you have the wrong rings. Install the piston in the bore up side down and attach a fish scale to the large end of the rod and pull the assembly up the bore and read the resistance in pounds. You should have about 15 to 18 lbs. Anything less and you will get oil past the rings. Once you find a good set of expanders keep them and only replace the rails on the oil ring when you are freshening your engine

Mike

11-26-2007, 10:37 PM	#9
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,459 Likes: 620 Liked 1,946 Times in 587 Posts	Re: Oil Passing By Rings Rick, You should have 15 lbs of drag on the piston with the oil rings installed. If you can install the piston without a ring compressor you have the wrong rings. Install the piston in the bore up side down and attach a fish scale to the large end of the rod and pull the assembly up the bore and read the resistance in pounds. You should have about 15 to 18 lbs. Anything less and you will get oil past the rings. Once you find a good set of expanders keep them and only replace the rails on the oil ring when you are freshening your engine Mike __________________ Mike Pearson 2485 SS