I'm currently rebuilding my stock motor and I'm sizing up the rings right now. I was wondering, min/max ring end gap is .006-.024 I believe and my question is should I be aiming for the big end of the gap? I was thinking I should shoot for the smaller end of .006 so I'd have the optimum seal per the minimum gap but then I thought, doesn't the ring expand (like all other metals) when it gets heated up? So I was thinking that by going for the bigger gap, I'd have a better "buffer" in case the metal expands too much. Anyone have any knowledge (first hand preferred) about the correct method to size up the ring end gap? Keep in mind, it's a stock rebuild. I'm not going for power increase, turbo, etc. The only thing not stock is it's overbored .5mm due to a cylinder not being round at one spot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 24TEN &raquo;</TD></TR><TR><TD CLASS="quote">I'm currently rebuilding my stock motor and I'm sizing up the rings right now. I was wondering, min/max ring end gap is .006-.024 I believe and my question is should I be aiming for the big end of the gap? I was thinking I should shoot for the smaller end of .006 so I'd have the optimum seal per the minimum gap but then I thought, doesn't the ring expand (like all other metals) when it gets heated up? So I was thinking that by going for the bigger gap, I'd have a better "buffer" in case the metal expands too much. Anyone have any knowledge (first hand preferred) about the correct method to size up the ring end gap? Keep in mind, it's a stock rebuild. I'm not going for power increase, turbo, etc. The only thing not stock is it's overbored .5mm due to a cylinder not being round at one spot.</TD></TR></TABLE>

Hey, they say: the bigger the ring, the louder she sings.

 

what motor is this for??get an oem service manual, but this is what I do for my ring sizings...

your average is going to be .015"(.006+.024/2) so what i usually do after making my averages i add .001"-.002" accordingly

for example my CP rings are all very close to min. spec of .016" but I will be filing them to .018" for the primaries...

follow your oem manual and you dont want to shoot for the minimum stay around the middle and you should be good to go...AND! dont forget to file them inwards and stone the rings as well

 

That's actually where I'm at right now on the first set, a few thousandths under max end gap. I didn't think the motor itself mattered since it's kinda based on technique but since you ask, it's just a D15B8.

I was going by the Chilton's manual and compared the specs to the FSM and guess what? Chilton's listed the end gap as stated above for min/max while the FSM states, .006-.012 with a service limit of .024. So pretty much, I filed them past the ideal gap specs

Off to the dealer I go to order one set of rings for one damn piston


Modified by 24TEN at 10:39 AM 7/19/2008

 

the reason I asked what motor it was for because you always need to double check the service manual for the motor before making any assumptions...just follow the honda manuals those are my bibles...never trust third hand publishing