Removing piston from rod?
Removing piston from rod?
Just got in from the shop where I dropped of my pistons to get new rod bolts installed. They have to remove the pistons obviously, and he said they're going to shatter cause the LT1 pistons are so cheap.
I was not aware that it was such a high probability. I thought if you had good equipment, knowledge and were careful, you can remove them without shattering the piston, although in some cases I know it happens. He said 90% chance they're going to break though.
Am I wrong for worrying?
[autostream]http://autostream.com/camaroz28/?page_type=firebirdplayerthumbnail&framepage=1690& transactionid=1315333749-691417789&posted_by=raroz28_www.camaroz28.com&yout ube_video_id=B4e7PNzbTzY[/autostream]
I'm just a little annoyed because I bought a whole new set of pistons simply because mine had so much carbon on them, now I'm hearing these cherry pistons are going to shatter anyway.
I was not aware that it was such a high probability. I thought if you had good equipment, knowledge and were careful, you can remove them without shattering the piston, although in some cases I know it happens. He said 90% chance they're going to break though.
Am I wrong for worrying?
[autostream]http://autostream.com/camaroz28/?page_type=firebirdplayerthumbnail&framepage=1690& transactionid=1315333749-691417789&posted_by=raroz28_www.camaroz28.com&yout ube_video_id=B4e7PNzbTzY[/autostream]
I'm just a little annoyed because I bought a whole new set of pistons simply because mine had so much carbon on them, now I'm hearing these cherry pistons are going to shatter anyway.
Re: Removing piston from rod?
They're probably going to press the old ones off and if they don't have the exact right cradle to set the piston in they might break them (they'll probably get a little galled anyway), but they will put the new ones together differently, probably put the rods in an oven so they can expand the small end and assemble them gently. Not to worry.
Re: Removing piston from rod?
They're probably going to press the old ones off and if they don't have the exact right cradle to set the piston in they might break them (they'll probably get a little galled anyway), but they will put the new ones together differently, probably put the rods in an oven so they can expand the small end and assemble them gently. Not to worry.
110 for reconditioning
30 for piston pin reconditioning
48 for piston r&r
60 for arp rod bolts
Re: Removing piston from rod?
We have pressed some on and off, We have atool made and it is still tricky. However a Good machine shop should have a rod heater. It heats the pin end of the rod and the rod slides right in. Its a lot less stress on the rod and piston this way
Re: Removing piston from rod?
Yeah, I don't see how any "professional" shop couldn't.
Also the video posted by the OP shows an old generation of pin removal tooling that stresses the piston when removing the pin and highly increases the likelihood of breaking it, the tooling I used cradles the bottom side of the rod small end and I can with a great level of success press pins out on cast pistons multiple times without the risk of breakage.
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dbusch22
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Oct 31, 2016 11:09 AM



