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Post by lcowner on Jun 11, 2011 19:02:38 GMT 1
well i stripped my motor outa frame after the blow up at the isle of man tt and the news is not good  .took head off and rhs piston has disintragated!looks like no damage to lhs at all small end and big end bearings caput .gunna have to split crankcases and see what other damage is done but at the moment im looking at new pistons,con rods,small and big end bearings,and probably new crank or recon one of norbo.couldent take anymore today so i just left it on my bench to strip it maybe next week.dunno wat the cause was but i persume by the state of piston it was no oil but im not sure......will put up piccys wen i stop crying  this is a real pisser................... |
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Post by JonW on Jun 12, 2011 0:06:10 GMT 1
LOL @ Rave, commiserations to RD Nut  |
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Post by lcowner on Jun 12, 2011 8:52:45 GMT 1
lol rave u do make me smile,as 4 my motor well it cud be worse i suppose |
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Post by lcowner on Jun 12, 2011 10:01:08 GMT 1
he he he
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Post by soccersmyth on Jun 12, 2011 11:26:37 GMT 1
Hard luck there Paul.
I have a fairly good 4L0 crank.
Came out of a running bike.
Come and lift it and get it double checked to make sure all is square.
If it'll do you're job,
I'll not rob ya (much)
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Post by lcowner on Jun 12, 2011 12:38:11 GMT 1
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Post by soccersmyth on Jun 12, 2011 12:45:36 GMT 1
Something wrong with that first pic.
All i can see is a reflection of your camera(fone)
2nd pics looks more like a severe overheat due to a serious lack of lube done that.
3 pic thats messy but can be repair at a cost.
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Post by lcowner on Jun 12, 2011 12:51:11 GMT 1
cheers john,im going back to pre-mix after this now fcuk this  |
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Post by lcowner on Jun 12, 2011 15:49:40 GMT 1
so are we all going for lack of oil that caused this??? |
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Post by lcowner on Jun 12, 2011 18:53:46 GMT 1
rave i know wat u mean!!!
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Post by billy on Jun 12, 2011 19:21:51 GMT 1
The piston tang rarely makes an engine blow up. It CAN happen if you're extremely unlucky, but mostly they just get a bit rounded off and won't be in the way. Once rounded off, the risk of the tang jamming the inlet port is absolutely minimal, so IF the tang is responsible, it would most likely be in the very early life of the piston. I don't know what the hell happened to your engine, it's hard to give a diagnosis when you have a blown bigend bearing AND an overheated/blown up piston. What part decided to go pop first? And what was the cause?  You tell me lol.. I'd say it was an overheated piston, but why the bigend went, I don't know. It could also be the bigend that went pop, taking the piston with it. |
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Post by lcowner on Jun 12, 2011 21:23:47 GMT 1
cheers billy
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Post by lcowner on Jun 13, 2011 9:55:46 GMT 1
There looks a hell of a lot of corrosion in there,has the bike been left standing or has the gasket let coolant into the crank and accelerated wear ? dont think so , coolant levels wer ok.looks worse in piccys but not much worse ;D. |
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Post by lcowner on Jun 13, 2011 15:28:49 GMT 1
yeah love em alright,f**kin money pit .if my missus knew how much ive spent and planning on spending now well lets just say she wouldnt talk to me |
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Post by Deleted on Jun 13, 2011 19:12:12 GMT 1
Big end breaks up,
needle rollers floating around the bottom,
then up the transfer ports,
onto the top of the piston-hence the mess on top
big end all sloppy,
then bang!!
Mind you I've just had a few stellas.... ;D
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Post by lcowner on Jun 13, 2011 20:04:18 GMT 1
yeah cheers m8 the other big end is a bit sloppy alright upon further investigation tonight, so i would say ur right .i just have me fingers crossed that the crank isent too bad and wont cost me the price of a new bike!!
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Post by lcowner on Jun 15, 2011 17:10:47 GMT 1
well got crankcases spit this evening,crankcases will need a bit of a clean up(may send for vaporblast me thinks) other than that its a new crank or get my own rebuilt  |
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.took head off and rhs piston has disintragated!looks like no damage to lhs at all small end and big end bearings caput .gunna have to split crankcases and see what other damage is done but at the moment im looking at new pistons,con rods,small and big end bearings,and probably new crank or recon one of norbo.couldent take anymore today so i just left it on my bench to strip it maybe next week.dunno wat the cause was but i persume by the state of piston it was no oil but im not sure......will put up piccys wen i stop crying 
