robert0762 Posted May 18, 2012 Report Share Posted May 18, 2012 This is the second time it has happened and both times its been on the left cylinder. I do know how to correctly install the o-rings. I use plenty of grease to keep them seated . I also torque to the correct specs. in proper order and don't over tighten. My set up is 4 mill mx port . Domes cut by same guy who did port job . Site sponsor here. Chariot head 21 cc domes running a 50/50 mix. Jetting is a tad rich but very close. No signs of deto. The viton o-ring on the left cylinder will get a thinspot in it and allow water into the cylinder this has happened twice since I have had these higher compression domes. Prob bout six months apart. I'm gonna try it one more time then if it does it again I know I def got a prob somewhere. Any suggestions on where to look Possible things that may be causing this ? Quote Link to comment Share on other sites More sharing options...
toytech Posted May 18, 2012 Report Share Posted May 18, 2012 did you check the cylinder decks when installed to make sure they match and are not warped? Quote Link to comment Share on other sites More sharing options...
robert0762 Posted May 18, 2012 Author Report Share Posted May 18, 2012 (edited) Bump Edited May 18, 2012 by robert0762 Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted May 18, 2012 Report Share Posted May 18, 2012 X-2 on checking flatness of cyl. , might want to double check head. Did you use same dome in left side both times? Quote Link to comment Share on other sites More sharing options...
hp2000 Posted May 18, 2012 Report Share Posted May 18, 2012 What brand head? Quote Link to comment Share on other sites More sharing options...
robert0762 Posted May 19, 2012 Author Report Share Posted May 19, 2012 (edited) X-2 on checking flatness of cyl. , might want to double check head. Did you use same dome in left side both times? Yes. But other domes no problem Edited May 19, 2012 by robert0762 Quote Link to comment Share on other sites More sharing options...
robert0762 Posted May 19, 2012 Author Report Share Posted May 19, 2012 What brand head? Chariot Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted May 19, 2012 Report Share Posted May 19, 2012 X-2 on checking flatness of cyl. , might want to double check head. Did you use same dome in left side both times? Yes. But other domes no problem If I'm understanding this, problem seems to be with that dome. Quote Link to comment Share on other sites More sharing options...
ClayAiken Posted May 19, 2012 Report Share Posted May 19, 2012 Put the old domes back in? If im reading this right. Quote Link to comment Share on other sites More sharing options...
shakar Posted May 20, 2012 Report Share Posted May 20, 2012 put alil sealer on the oring that keep blowing,but id check the deck with a straight edge first off.also check to see if the domes has a lil dent or blem.... goodluck Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted May 22, 2012 Report Share Posted May 22, 2012 If the old domes don't blow head o-rings, then its a problem with the new domes and not the flatness of the cylinder decks. I would bet the farm on it, that whoever cut your squish band, has the angle negative to the piston crown angle, instead of postitive. I've seen this before. Double check the angle of the domes and piston crown with a machinist plate protractor. Quote Link to comment Share on other sites More sharing options...
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