Installing piston rings, quick help please

[DrMango]

Hey guys I have my new OEM rings to go on my OEM pistons. They are STD size rings and pistons as I didnt need the bore honed. He just ran the hone through for a good cross hatch.

1. Do I need to check the rings for the gap, or would they just be ready to go at their current gap and no trimming needed?

2. Is there an up on OEM rings? I have been reading that there is typically a dot or writting indicating up on the ring. I see 2 letters on the rings. There is an "s" and an "r". Safe to assume that is indicating up?

Thanks

Kyle

[mcfly]

should be 2 ductile iron, 2 thin oil control and one wavy oil control.

two top rings will have marks up. I would check ring gaps.
You must also space the gaps around the pistons properly. page en106 in gtr manual. adobe page 123

[DrMango]

Thanks McFly. I went home to grab my laptop which I forgot today. Thats why I didnt have my manual. I found it in the manual a few minutes ago.

Kyle

[rb-racer]

page 126 - en109 has the piston ring gap specs as well

[DrMango]

Ive been installing the oil scrapper rings now and they are pretty tight fit to get the 3rd ring in that groove. Is the normal? the other 2 compression rings are nice fit with the feeler gauge readings

Kyle

[DrMango]

sweet life I live lol. Over filed one of the 2nd compression rings to .60 mm

Damnit now I need new ring

Kyle

[mcfly]

thats not the end of the word if you had a engine running lots of nitrous or boost :p

[DrMango]

but in my case at 15 psi I better get a new one right?

Kyle

[DrMango]

One last question.

Out of the box brand new, the top compression ring came in at .38mm and the manual states that the gaps need to be .24-.34mm. Is that a big deal to be that much over? Didn't have the bore honed or anything. He just ran it through for a cross hatch. Measured bore and its like 77.89 mm on my calipers

Kyle

[rb-racer]

what does your piston measure out to?

[DrMango]

From memory it was something like 77.6 ish but I can recheck when Im at the garage its in this morning

Kyle