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Post by 190mech on Sept 12, 2018 17:53:40 GMT -5
How many motors modded do we see that more than doubles its capacity?Very few!Dig out that patch,sand,prep and patch it again!  |
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Post by AtariGuy on Sept 12, 2018 18:38:59 GMT -5
How many motors modded do we see that more than doubles its capacity?Very few!Dig out that patch,sand,prep and patch it again! This post - by 190mech - was the first post on the 190th page! Coincidence? |
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Post by 90GTVert on Sept 12, 2018 18:42:31 GMT -5
That blows, literally. I going to guess that the epoxy is from opening up the case/breaking thru and making room for the oversize crank ? Clarification. Before trenching. This is with the cases cut for larger bore/stroke though.  After. It's the actual trenched area where the leaks are. The large chunk is all internal, just to shape that area to flow more smoothly toward the transfers.  |
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Post by 90GTVert on Sept 12, 2018 18:49:47 GMT -5
How many motors modded do we see that more than doubles its capacity?Very few!Dig out that patch,sand,prep and patch it again! That's the plan. Just wasn't excited to learn that I'll be tearing the engine totally apart after I just put it together again. It happens. I've had so many cases filled like this without much trouble. First one I've added that big puddle of JB inside to, and I thought that would likely be an issue if anything was. |
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Post by gsx600racer on Sept 12, 2018 19:28:03 GMT -5
How many motors modded do we see that more than doubles its capacity?Very few!Dig out that patch,sand,prep and patch it again! That's the plan. Just wasn't excited to learn that I'll be tearing the engine totally apart after I just put it together again. It happens. I've had so many cases filled like this without much trouble. First one I've added that big puddle of JB inside to, and I thought that would likely be an issue if anything was. Might be possible that some engine bits could of been pushed/jammed into that area knocking the jb weld loose. |
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Post by 90GTVert on Sept 13, 2018 5:51:22 GMT -5
Got up at 4AM cause I couldn't sleep. Did some quick errands while normal people slept and then took the cases apart. At least nothing looked bad inside. I was afraid the cases could be cracking or something.  Cut through a little more while digging out with a carbide burr.  Done and refilled.  |
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Post by aeroxbud on Sept 13, 2018 6:02:04 GMT -5
Fingers crossed it test ok this time.
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Post by ryan_ott on Sept 13, 2018 10:04:55 GMT -5
Well at least you know there are no needle bearing bits left over...
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Post by 90GTVert on Sept 13, 2018 10:09:10 GMT -5
I was pretty confident without this, but nothing is in there. Didn't take the crank all the way out, because the exposed bearing still seemed about like new. I was gonna replace them since I had to have it apart and it has 1,000 miles on them plus the failure, but it didn't seem like any point.
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Post by 90GTVert on Sept 13, 2018 15:57:34 GMT -5
Waiting on everything to cure again. Let the JB cure enough to smooth the inside and that I thought it could take heating the case, then reassembled and changed gear oil. Gear oil was darker with a little more debris on the drain plug than I'd like, but I've had no symptoms so I'm leaving it for now. Maybe whenever I change tires I'll change the oil again and see how it looks unless something makes me think it needs attention sooner.  |
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Post by gsx600racer on Sept 13, 2018 16:02:24 GMT -5
Well at least you know there are no needle bearing bits left over... I second this thought. Having peace of mind is nice to have when you're aways from home.  |
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Post by 90GTVert on Sept 14, 2018 17:45:26 GMT -5
I'm gonna have a lot of "peace of mind" by the time this is done. I thought it was just the large top section that was leaking. Wrong. Top is now sealed, but it's clear the lower section is an issue.  I made up a new plug wire with MSD dual crimp terminals and Moroso Ultra 40 wire. Figured if I have more logos I have more HP. One of the old ends was no longer clicking or giving me any assurance that it was well connected when pressed on. Tested fine for resistance, but I didn't like wondering if it was a good connection each time.  |
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Post by 90GTVert on Sept 15, 2018 17:46:47 GMT -5
It's all back together again after digging out and refilling the lower section and just failed another pressure test. Looks like it's leaking on the top edge again. Not 100% sure it's just the lower section because they're so close together.
I've been cleaning with alcohol and letting that dry before application. It's roughed up. Not sure what else to do. Did a really brief search for adhesion promoter for JB Weld, but they don't mention anything but detergent/degreaser. Never had this problem before and all of my builds have cases filled this way.
I had been trying to hustle (as much as you can when JB and sealants need cure time) because the forecasters got it way wrong for the weekend. It was 80 and breezy here today. I think 15-20MPH winds at the beach and cloudy. Was supposed to be a wash out with at least 35-45MPH winds. Once it failed the leak test though, I just dropped the tools and went in the house. I thought maybe I could get it in the scoot tonight and if I was really lucky make an attempt at the show tomorrow. No chance now. Wouldn't be cured till everyone was heading home from the show.
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Post by 190mech on Sept 15, 2018 19:00:18 GMT -5
Acetone is the go-to for clean prep,,when you dug out the old epoxy a few posts back it appears to show a hairline crack in that area,or is that just a scratch?Even if it was a crack I'd just add some more epoxy as it doesnt extend into the cyl flange or bearing seat..
PS;How do you pressure check an engine with an exhaust power valve?You cant!!!
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Post by 90GTVert on Sept 15, 2018 19:06:29 GMT -5
Could have been a crack in the JB in the lower part that extended from the top part. That was dug out. Didn't see it in the cases. The part on the case that you can see I don't think was a crack.
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