Installing new rings

[grain_ya]

I'm trying to put my engine back together now. At the piston stage. My pistons are the ones with the anti-spin piece in line with the wrist pin. The piston rings that came out of the engine didnt have the 45* bevel at the ends of the intermediate ring. The new rings do. This ring is giving me problems with going into the cylinder. Not sure if I need a different (bigger) gap. Anyone have any experience to share with me?

 

First picture is of the old rings. Second is new rings.

[JFP in PA]

Welcome to RennTech 

 

What is the end gap of the ring in question when inserted alone into the cylinder bore at a depth of about 1 inch below the deck?

[grain_ya]

The new 45* ring has a .032 gap and the old n on beveled ring is .018

[JFP in PA]

2 hours ago, grain_ya said:

The new 45* ring has a .032 gap and the old n on beveled ring is .018

 0.032 is more than a little lose for this bore size, the old rings are closer to correct. 

 

To make sure I understand where you are, you cannot get the piston into the bore with the new rings on it, correct?  If so, what kind of ring compressor are you using?  And where did you source the replacement rings from?

[grain_ya]

Yes, the intermediate ring keeps getting stuck it seems when trying to insert into cylinder. Using the blue tube type ring compressor. I believe I got the rings from autoatlanta. They do say 02-05 carrera on them. Jake raby also said i needed the ones with the 45* bevel on the intermediate ring. Strange how the motor didnt have rings with a 45* bevel in them when I took it apart

 

[grain_ya]

I bought a 96mm tapered piston compressor, so maybe that will help this

[grain_ya]

Although it seems I'm talking to myself here, i found that i measured the wrong ring in the post above. the .018 gap ring that I posted was for the top ring. I measured the intermediate ring and found its gap to be .116.... So with a size of the dowel in the piston of .097, - the intermediate ring would have a gap of around .018 to .019. The question is that the 45* bevel will need to be ground off....

 

My question is do i grind off both sides of the bevel or what.. any ideas?

[JFP in PA]

28 minutes ago, grain_ya said:

Although it seems I'm talking to myself here, i found that i measured the wrong ring in the post above. the .018 gap ring that I posted was for the top ring. I measured the intermediate ring and found its gap to be .116.... So with a size of the dowel in the piston of .097, - the intermediate ring would have a gap of around .018 to .019. The question is that the 45* bevel will need to be ground off....

 

My question is do i grind off both sides of the bevel or what.. any ideas?

 

You need to take equal amounts of both sides of the gap to obtain the final clearance.  We use a Total Seal unit to do this:

 

 

But you can use a simpler hand tool like this to get to the same place: