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Shortening Chromoly push rods
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notorious KGB
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PostPosted: Fri Mar 16, 2012 12:22 am    Post subject: Shortening Chromoly push rods Reply with quote

Has anyone tried to shorten chromoly pushrods that were purchased already cut and assembled to length from CB performance?
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mark tucker
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PostPosted: Fri Mar 16, 2012 8:33 am    Post subject: Reply with quote

it depends on how much they need shortning.if you have a lathe you can cut them down almost to the id and pull the ends out if there is enough room.but dont cut into the end shank.
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notorious KGB
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PostPosted: Fri Mar 16, 2012 9:18 am    Post subject: Reply with quote

Once cut I could press them until they seat again. Or use a type of soft mallet maybe?
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the2ndcashboy
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PostPosted: Fri Mar 16, 2012 9:27 am    Post subject: Reply with quote

Unless you need to cut them down a lot (.250"~) you are probably going to have a hard time getting the old tips out using the undercut method. Those tips are pressed in there pretty tight.
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Dale M.
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PostPosted: Fri Mar 16, 2012 9:46 am    Post subject: Reply with quote

notorious KGB wrote:
Once cut I could press them until they seat again. Or use a type of soft mallet maybe?


I use two old lifters one as a base (on anvil or solid steel object) and one as a protector from hammer blows with a real "steel" hammer..... Soft mallet is not going to be much help...

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notorious KGB
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PostPosted: Fri Mar 16, 2012 9:56 am    Post subject: Reply with quote

sure just watch I dont bend them. I have machining skills, suppose I machine them as discussed earlier ,then file the rest of the tube to the OD of the insert. Without taking it out , just push it till it bottoms. Being carefull not to damage the insert OD badly other than light file marks. Maybe
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UK Luke 72
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PostPosted: Fri Mar 16, 2012 9:58 am    Post subject: Reply with quote

Not sure about CroMo's but with stock pr's you can pein them just slightly around the circumference just below the end and the will eventually work loose
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ap_sand
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PostPosted: Fri Mar 16, 2012 12:06 pm    Post subject: Reply with quote

After figuring out exactly how long they needed to be (didn't want to do it twice), I used a fiber reinforced cutoff wheel in a dremel.

Marked the location of the cut line with tape and with the rod clamped in a vice carefully cut deeper at the line until through the wall. Nibbled out a line to the underside of the tip then used the corner of a chisel to spread the ring enough to fall off.

Tapped the end in between two old lifters.
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notorious KGB
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PostPosted: Fri Mar 16, 2012 2:29 pm    Post subject: Reply with quote

Great. You see I got some CB 044 mags that have CR's lower than I want. Cutting them down is going to make my Push Rods long. As is they are a little long due to the swivel feet.

Thanks everybody, hoping it was not to difficult to modify for what I will have to do.
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