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Old 08-21-2008, 01:20 PM
Don Meyer's Avatar
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new pistons/rods

Can rods be pressed on new pistons cold w/o problems or do they have to be heated. How do you do it?

Thanks Don Meyer

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Old 08-21-2008, 03:42 PM
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I believe they need to be heated,take them to a shop and have it done properly,its not that expensive.
Guy
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Old 08-21-2008, 03:49 PM
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I believe heating is the prefered method now. Long ago when i actually did machine work (early 70's) we would press them in. I dont think they do them that way now.

Chet
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Old 08-21-2008, 04:19 PM
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new pistons/rods

my machinist has a tool that allows him to add or remove them without heating , he's done several and had no problems .i know he's had it over twelve years .
never seen him put rod pins in refridgerator first either .
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Old 08-22-2008, 04:54 AM
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installation

There is a tool that supports the rods for doing them cold..IMO I don't like it, to much of a chance of cracking a piston. I know they say you can't using that tool but i think different.

Thats not a high dollar item at a shop. I charge like $25.00 a set to hang them if the rods are clean and ready to go.

Keith
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Old 08-22-2008, 05:39 AM
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Thanks for the replies. My engine builder was going to try to do it cold, but you all have convinced me that they need to be take them to a mach shop.

thanks - I always get good answers here.
Don
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Old 08-22-2008, 01:51 PM
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I called several mach shops & they say they never saw pistons/rods like mine.
My rod floats on the pin & the pin is a interference fit on the piston.

Neither mach shop had facilities to heat pistons only the rod.

Can I heat the piston w/a torch & press the pin thru?

Don
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Old 08-22-2008, 07:40 PM
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What kind of pistons and rods do you have? Pins that press in the piston is a new one on me.
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Old 08-23-2008, 07:26 AM
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They are from a Corvair.......Don
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Old 08-23-2008, 12:00 PM
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rods

Silly us,,i guess we all were thinking small block chevy..

I have never seen that either. You will need to find a shop that is skilled enough to mic the pin, bore gage the piston pin bore and figure out the fit. Then come up with a way to shrink the pin (aka dry ice) or warm the piston enough for assembly.

If you run out of options in your area PM me. I might be able to help you out.

Keith
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