lil Doobie420 Posted August 23, 2015 Report Share Posted August 23, 2015 when i tested min itvdidnt leak at all jus sayin.. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted August 24, 2015 Report Share Posted August 24, 2015 ^^^ Exactly Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 24, 2015 Report Share Posted August 24, 2015 So my brother came by today and we got to talking about the engine. Pulled the head and think we found my leak.... Looks like the one rings shifted on the domes on install and let the coolant leak past. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 24, 2015 Report Share Posted August 24, 2015 Oh yeah. Really clean the cylinder walls up while you're in there. Coolant makes them glaze pretty quick. Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 24, 2015 Report Share Posted August 24, 2015 So I'm guessing a fresh set of our rings, new crush washers and leak test again? Makes sense why the leak was so slow if this is the case Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 24, 2015 Report Share Posted August 24, 2015 Yep. Take your time and get the head about 1/4" from seating and look between the cylinders and head to make sure the O rings are in place. 1 Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 24, 2015 Report Share Posted August 24, 2015 Will do. I assume this was the whole issue. There was an overheating issue that led us to pulling the head off tonight. It only had a day of riding on it between being built and now. So nothing damaged or torn up. No wonder my soap and water didn't show me any leaks lesson learned though. It will pass a 6 minute test before it runs again even if this isn't 100% the issue and I have to pull it again. I was in a pinch to get it running for a big ride last weekend and did the best I could in the time I had Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted August 24, 2015 Report Share Posted August 24, 2015 If the cylinder got wet, more than likely it got glazed and you should buy a ball hone and deglaze the cylinders, then install new rings. And when installing a cool head, I always install the orings with a little bit of Vasiline. The Vaseline is sticky and does a great job holding the orings in place when you invert the head. I just did this entire job on my buddy's dune ported 89. Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 24, 2015 Report Share Posted August 24, 2015 The cylinders are oily, they look fine. Doesn't look like it burned any of the coolant. I used a little grease to hold the Rings in place but I will use Vaseline next time. All I can think of is they came loose when I worked it down over the studs. We found the burn spot on each o ring where it appears it got pinched between the head and jug Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted August 24, 2015 Report Share Posted August 24, 2015 Any grease is fine. Doesn't have to be Vaseline. Quote Link to comment Share on other sites More sharing options...
willaduncan Posted August 25, 2015 Report Share Posted August 25, 2015 Good Job on finding that leak... Yea strm is right grease is just fine anything like that... Some guys use chap stick... I use grease cause I have tons of it... We spend way too much money on these things to ever think about running them with any type of "acceptable" leak... A leak is a leak it isn't gonna get better Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 28, 2015 Report Share Posted August 28, 2015 Well guys the O-rings came today, got the head on and it passed the leak down with flying colors. Needle never budged. I was in a rush when it got built and admit it was a bad situation but it's been corrected, almost 10 minutes later she's still holding! I'm very happy Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
willaduncan Posted August 28, 2015 Report Share Posted August 28, 2015 Well guys the O-rings came today, got the head on and it passed the leak down with flying colors. Needle never budged. I was in a rush when it got built and admit it was a bad situation but it's been corrected, almost 10 minutes later she's still holding! I'm very happy Sent from my SM-N910V using Tapatalk Sweet! Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 28, 2015 Report Share Posted August 28, 2015 Ended up holding for 17 minutes before I let it off and started assembly. Now it's backfiring when it comes off idle. It looks like it's backfiring left pipe, right pipe, left again etc. Might be way rich but I backed the air screws out half a turn at a time and it still does it Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
bmccormick08 Posted August 28, 2015 Report Share Posted August 28, 2015 I think this coil might be the cause. Going to try stock again Sent from my SM-N910V using Tapatalk Quote Link to comment Share on other sites More sharing options...
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