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Post by 90GTVert on May 26, 2019 18:42:03 GMT -5
I was posting that as you posted, John. I did cut the outer wall of the o-ring area. Looks like I went way conservative on the fit. So it sounds like you're saying this ring is the gasket or am I misunderstanding that? Right now, the stuff that was faced was all done together, so the outer edge and the inside are level, just with this ring sticking out ATM.
"have the gasket ring thickness even with the water jacket outer sealing O-ring flange"
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Post by 190mech on May 26, 2019 19:05:49 GMT -5
Here is a poor drawing of what I'm trying to say,,We are dumpimg the inner O-ring and adding a much wider sealing ring made from metel instead of rubber,,Still think some O-rings need to be used on the thru studs..
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Post by 90GTVert on May 26, 2019 19:58:49 GMT -5
Gotcha. The whole time I've thought of this as a filler so a regular flat gasket could be used.
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Post by 90GTVert on May 27, 2019 0:25:36 GMT -5
Still think some O-rings need to be used on the thru studs.. That's gonna be a problem as-is. I made up a piece that matches the ID and OD of the stud passage closely and drilled a 6mm hole through it. That will let a 6mm bolt pass through without a bunch of play, and provide a clamping surface on the top that wouldn't get in the way of trying to make a cut hopefully. An M6x1.0 cap screw has a head just barely larger. Then I made up a piece to bolt that down to that can be held in the chuck. I can't spin it all the way around because the lathe is too small, but it looks like I can rotate it enough to use the rotary tool to cut a groove. I will have to cut the head of the bolt down to match the other pieces first though. Maybe the easier way would be to pop the spacer out and grind it real quick, but I wanna see if this flies. This is a lot of effort for a cylinder kit that I don't think I can replace now. We may solve a problem... that affects only me... for a limited time. lol I guess this is where you have to take it as a learning experience to make it make sense.
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Post by 190mech on May 27, 2019 4:18:01 GMT -5
I'm worried about most of the sealing ring being cut away for the O-ring seat,could a seal be used on the head nut washer instead?If water crept down the stud,would it leak out anywhere,or the base gasket would seal it??
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Post by 90GTVert on May 27, 2019 6:12:05 GMT -5
These are full ported cases, so 2 studs are open to the crankcase at the bottom. I use Permatex Form-A-Gasket 2 there. I do actually use a base gasket on this setup and it is coated with Threebond 1184. Both of those are OK for coolant. How well they actually work if coolant gets in there; I don't know. McMaster has sealing washers rated up to 500F in 1/4", actual 0.265" ID, 1" OD for $3.41 each, so about $20 worth of washers with shipping. I didn't even know there was such a thing till now.
Seems like it would be most effective to stop it before it gets into the stud passage if possible though. I can cut the head of the bolt down and try to see where it would actually cut the groove.
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Post by 90GTVert on May 27, 2019 6:51:03 GMT -5
It's pretty much going to be back to the original situation of roughly a 1mm wall (maybe 0.040-0.050") between the combustion chamber and the o-ring.
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Post by 190mech on May 27, 2019 8:06:51 GMT -5
Check out stat-o-seal if you want to buy a sealing washer; McMaster-Carr has them I make my own with a flat washer and o-ring; Washer should be slightly thinner than the o-ring for proper squash...
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Post by 90GTVert on May 27, 2019 9:46:01 GMT -5
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Post by oldgeek on May 27, 2019 9:51:35 GMT -5
LC!
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Post by 90GTVert on May 27, 2019 11:37:06 GMT -5
LC! You know what the worst part is? It works. This would be so much easier if it didn't make a better setup when it was together so I could just toss it all and go back to AC with no regrets. lol
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Post by aeroxbud on May 27, 2019 11:41:32 GMT -5
Go liquid cooled they said. It will be more reliable they said. 😡 That's a good tip 190mech they don't do stat-o-seal in the U.K. I have used Dowty Washers, which is the same idea.
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Post by 90GTVert on May 27, 2019 15:35:07 GMT -5
I rode the TMAX for a bit and then I was gonna get the engine out of T2 before I have to cook burgers. Came home and pulled the hose off of the water pump and there was a loud pop and then coolant all over me. Usually I'll crack the cap first, but I wasn't thinking. Went in and got cleaned up so I can start cooking in a few. Today has been one of those days. Had a bird hit me in the foot when I was riding and bounce off lifelessly. People all over the place so I couldn't even ride very fast because of so many blind turns with bicycles or fishermen. Actually saw a scooter in the swamp... and he was pulled over right on one of the sharpest curves standing and taking pics on the opposite side of the road as his scooter. I found Harleys on the way home and couldn't even mess with them because they could barely do basic maneuvers and then pulled into the first bar they saw. Well, 3 of 4 pulled in. 1 sat in the road just past the entrance having no idea what to do to get in there, as if Harleys can't be pushed backwards or turned around while another bike (or scoot) sits back to give you room. A bunch of people going well under the speed limit. I honestly don't think I've ever had so much stuff slow me down in a short 3 hour ride.
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Post by 190mech on May 27, 2019 15:43:37 GMT -5
It's a Holiday!Lots of folks have the day off,they do what they want,some like drinking and riding Harleys!!
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Post by pitobread on May 27, 2019 16:18:44 GMT -5
I am wondering if there just isn't enough gasket crush leading to failure. You want about 18% protrusion for proper seal on an o-ring.
Also those gaskets look like the ones from my Stage6 modular race kits. They use those fancy green rubber on them. Perhaps a better quality gasket?
I would also copper coat both faces, just because. That stuff is magical.
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