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Post by Ragger rd on Sept 8, 2013 19:49:29 GMT 1
i have just bought a 250 lc motor from local yam dealer,its been sat under a bench for god no how long,i have taken the head off she is on standard bore,but the pistons are stuck and cannot remove the barrels,so any advice would be good,she is going in my hybrid with 350 barrels on her
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Post by simon5264 on Sept 8, 2013 20:04:07 GMT 1
Brake fluid leave over night then that souls do the job
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Post by winnerevo1 on Sept 8, 2013 20:06:56 GMT 1
As above but you can use diesel too, should free it up.
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Post by jollyjoiner on Sept 8, 2013 20:07:58 GMT 1
Or a few squirts of WD40 and then let it soak and then prob some two stroke oil as well
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Post by winnerevo1 on Sept 8, 2013 20:15:38 GMT 1
Diesel is much better than WD40. WD40 doesn't have good penetrating effects, the silicone content is better for protecting against water ingress than freeing off rust/oil/gum deposits.
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Post by Ragger rd on Sept 8, 2013 20:59:33 GMT 1
been using gt 85 all day,will try diesel next,used heat as well to soak the oil down in there
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Post by soccersmyth on Sept 8, 2013 21:21:11 GMT 1
Are you trying to pull the barrels up and off from the piston after lubing ?
Try putting a load of washer under the head studs (to take up the space from the removed head),
and screw the head studs to the barrel.
Then try rocking back and forward (light enough not to open) the big nut on the flywheel side of the crank.
It could be that the bottom ring aint getting any of the lubing and is still well solid.
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Post by steeley on Sept 9, 2013 8:07:10 GMT 1
block up the exhaust port and inlet port and warm some engine oil in a sauce pan then pore on top of the pistons.saw an aircraft engine freed up like that once.
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Post by Ragger rd on Sept 10, 2013 19:25:21 GMT 1
after some major oiling and swearing pistons removed,cheers for your help peoples
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Post by carioca656 on Sept 10, 2013 20:45:03 GMT 1
so how did you get it off in the end then??
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Post by Ragger rd on Sept 10, 2013 20:49:35 GMT 1
Soaked them over the last few days,today heated them block of wood and tapped them free,only took about 2 hours though,but got spare barrels now as have tuned ones to,go on hybrid
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Post by carioca656 on Sept 10, 2013 20:54:24 GMT 1
glad you got it sorted
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Post by carioca656 on Sept 10, 2013 20:54:52 GMT 1
good to know what works sometimes
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Post by Ragger rd on Sept 10, 2013 21:27:34 GMT 1
Lol was a load of work,but worth it,crank is sweet as a nut,
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