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Post by captincvmn on Jan 13, 2021 20:00:35 GMT -5
Odd. Something had to have entered or something internal tried to exit.
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Post by 808ministroke on Jan 26, 2021 8:30:20 GMT -5
Well I've narrowed it down to 99% sure that the metal pieces came from the screen on the Stack. I did try and even managed to get the old rang out without breakingPut on the New ring but it is not gonna fly. It feels weird when kicking it almost making a off sound I'm guessing there's something up with the crank or crank case in a spot where I'm not able to get to it I guess the only thing to do now is to tear it down? I did notice there was quite a lot of horizontal play with the Rod although I don't see how little pieces getting sucked in would have ruined the conrod so to speakUnless there's a damage area on the Bering I just can't see. So somebody please tell me the easiest way for a noob to disassemble this crankcase and reuse the bearings if possible as well asAnything else additional I'm going to need besides the tools to do this job of disassembling hopefully solving the problem and re constructing bottom end....
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Post by aeroxbud on Jan 26, 2021 9:51:52 GMT -5
You will need a flywheel puller, and a Crankcase Splitter/Separating Tool as a minimum. Heat gun makes it easier too. A sealant like Honda/Yamabond. New seals for the crank. To be honest, if in doubt I would just replace the crank bearings for how much they cost. I hope it's not to bad when you get it apart.
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Post by repherence2 on Jan 26, 2021 16:26:47 GMT -5
808ministroke,
You might as well put new bearings and new seals.
Did you remove the engine from the frame and flush out the crankcase with brakleen? There is probably some shards of metal in the main bearings or in the big end bearing of the con rod.
Did you rotate the crank after you cleaned up the metal pieces, prior to installing the new ring? Did the crank spin freely with no binding as you rotated it?
...or did you just change the piston ring and slap it back together?
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Post by 808ministroke on Jan 26, 2021 19:08:38 GMT -5
I did not take engine off of frame and flush it upside down which is what I'm planning on doing soon I did however check the rotation of the crank Before putting The cylinder back on I do have brand new seals already And I agree if I rebuild the bottom end to use new bearings seeing as they're not that expensive As for the tools I have the Fly wheel puller However no case Splitter and I am curious if I were to split the case wouldn't the bearings come off connected to the arms of the crank?? So would I need some special tool for removing those bearings? The way these cases are builtYou cannot see below the crank from the mouth of the case
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Post by 808ministroke on Jan 27, 2021 0:26:54 GMT -5
I dismantled the case from the frame took off this cylinder and the piston is well is time I cleaned it with brake cleaner and although I can't see any debris it seems as though the damage is definitely done and almost certainly a crank bearing lucky for me I found AK splitter that someone will sell to me for 40 bucks and the picture above shows how and where it was get stuck at especially after I sprayed the blade brake cleaner... Just hoping I can get away with new bearings and seals and not be required a tire new piston
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Post by 808ministroke on Jan 27, 2021 0:30:23 GMT -5
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Post by 190mech on Jan 27, 2021 5:12:57 GMT -5
Does the new ring fit the groove without binding anywhere?How about a pic of the piston where the old ring was stuck in the groove,,Heating the case near the main bearing with a heat gun(or propane torch) will make it easier to get apart..Remember a crank is easily bent out of true during removal and installation,so leave the hammers on the bench!
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Post by aeroxbud on Jan 27, 2021 5:24:41 GMT -5
You will need a bearing puller to get the bearings off the crank without damaging it.
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Post by captincvmn on Jan 27, 2021 5:37:26 GMT -5
Sounds Australian
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Post by aeroxbud on Jan 27, 2021 7:21:00 GMT -5
It is. It's a big chain motoring store.
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Post by yambw’s on Jan 27, 2021 8:57:24 GMT -5
Super cheap auto is epic! Wish we had them
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Post by 808ministroke on Jan 27, 2021 15:55:41 GMT -5
This is the piston with the new ring its seats fine but it doesn't rotate around the whole Groove of the piston the picture is of the very worst spot on the bottom of facing exhaust port where the sticking is occurring I am holding the ring inside the groove with my hand trying to 4 set out on that part I'm guessing this may not work however I'm not sure is long is the ring is in the groove in correctly position and is able to extruder out a tiny bit Would this work in theory?? How about in real life?
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Post by 190mech on Jan 27, 2021 19:00:47 GMT -5
Its likely some of the piston was squashed into the ring groove making it tight there,a sharp razor knife can be used to trim the high spots down in the ring groove to free it up,,
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Post by 808ministroke on Jan 28, 2021 2:05:10 GMT -5
Its likely some of the piston was squashed into the ring groove making it tight there,a sharp razor knife can be used to trim the high spots down in the ring groove to free it up,, Exactly my plan... So 1st question when you split a case to the bearings always stay it connected to the case halves or do they always stay connected to the crank or is it on a case by case basis lol. 2nd question when you guys say Honda bond with ultra great RTV silicone Be an adequate replacement? Unrelated but I always thought that long case never had a 3rd support bearing in that all the ones that had the 3rd support bring were short caseIs my assumption completely wrong does that even matter or is belsize more appropriate way to determine?
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