There's some truth in the "one-way" theory -- the cylinder bore can have
developed a raised ridge where the piston rings don't touch (top and/or bottom
of the stroke). If there's a ridge, and that's easy to determine just by
feeling with your fingernail for a "bump", then rent or buy a "ridge reamer" to
take it off and the piston should come out easily.
However, I suspect your problem has a LOT to do with the interesting statement
you made about the con rod still being stuck to the crank. The crank shaft is
a rather substantial piece of metal, and it won't allow much movement of the
piston if the rod is seized. You may want to stop hammering on the piston and
concentrate on getting the con. rod off of the crank.
Tom Waling
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From: gspens[SMTP:gspens@interactivemediaworks.com]
Sent: Wednesday, November 17, 1999 2:31 PM
To: triumphs@autox.team.net
Subject: TR6 piston removal
Is there any truth to this:
I'm trying to free a stuck piston from an old TR6 block. I soaked
it and now am sledging it from the top (side actually the block is on
it's side) with a piece of wood (hitting the wood with hammer, which in
turn hits the piston). A mechanic friend of mine says, "you can't do
that, the piston will only come out one way". Well as the connecting
rod is still attached and quite rusted to the crank, it seems I have to
hit the crown to push the piston "down" to get it out. Am I doing the
impossible? does te pistion have to go "up" to be removed?
Thanks
Graham Spencer
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