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piston removal question
Posted: Mon Sep 06, 2010 2:26 pm
by big-b
I'm trying to pull the head off my superhawk and the pistons seem to be stuck right at the bottom. The pistons move with some light tapping, (been soaking in kroil for a while now). I can lift the head up so the pistons slide almost all the way out the bottom but then they seem to stop. Someone told me sometimes the rings hang up on the bottom of the cylinder head and will break when you finally get it out. What am i missing?
Brian
Posted: Mon Sep 06, 2010 7:43 pm
by davomoto
Brian, it seems you are referring to the cylinder , not the head. The head houses the valves and cams, the cylinder houses the pistons. I would try sliding it all the way down, and giving it a good jerk upwards. Repeat as necessary, and it should slide apart. Sounds like your rings at least are shot anyway, so I wouldn't be concerned about further damaging them.
Posted: Mon Sep 06, 2010 7:51 pm
by big-b
Ya i meant the cylinder, the head is already off. I'll give it a good yank tomorrow and see what happens.
Brian
Posted: Mon Sep 06, 2010 8:35 pm
by LOUD MOUSE
Ya do want to be careful as the pistons exit the sleeves.
If they CANT/don't come streight out ya can/may/will crack the bottom of the sleeve.
If ya have the 180 crank work each piston out at a time. .......lm
big-b wrote:Ya i meant the cylinder, the head is already off. I'll give it a good yank tomorrow and see what happens.
Brian
Posted: Wed Sep 22, 2010 12:28 pm
by shooter_bighorn@yahoo.com
ive got same problem i can get one piston out of sleeve but other one hangs up dont wanna beat on it but i get full travel up and down with piston in the bore but one side will not come out of the jug can i take the motor and use a block of wood and tap it with a hammer or to risky?????
stuck piston
Posted: Wed Sep 29, 2010 1:29 am
by bikedoctor99
tapping the piston with wood and hammer should be ok. you should rotate the motor so you can spray more kroil between the bottom of the piston and cylinder, also cut or fit a block of wood between the bottom of the cylinder and case to support the cylinder-set the cylinder at a position that will allow the crank to rotate as the piston moves downward. at this time i would let the kroil work over night. reset the motor to upright. when you tap firmly onto the piston, use a soft wood(pine 1 1/2" square will do the trick)you may have to be a bit forceful. good luck!!