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07-09-2017, 08:11 PM | #1 |
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Join Date: May 2017
Location: Arkansas
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Piston Expanders?
Man, I never heard of this in my life. Since there's eight in a set I guess you installed them and ran with them? I'll see if I can link to ebay:
http://www.ebay.com/itm/Piston-Expan...53.m1438.l2649 |
07-09-2017, 09:02 PM | #2 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: Piston Expanders?
Very interesting, never heard of such a product.
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07-09-2017, 09:12 PM | #3 |
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Join Date: May 2017
Location: Arkansas
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Re: Piston Expanders?
So far, looks like Google never heard of em either.
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07-09-2017, 09:13 PM | #4 |
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Join Date: May 2010
Location: now Kuna, Idaho
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Re: Piston Expanders?
Sounds like you two boys missed out on the good ol' days! These were a common item back in the day.
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07-09-2017, 09:13 PM | #5 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: Piston Expanders?
The instruction sheet is interesting as well! Perfect Circle no less.
Last edited by JSeery; 07-09-2017 at 09:23 PM. |
07-09-2017, 09:27 PM | #6 |
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Re: Piston Expanders?
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07-09-2017, 09:28 PM | #7 |
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Join Date: Nov 2012
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Re: Piston Expanders?
Lean new stuff every day!!! https://docs.google.com/viewer?url=p.../US2341959.pdf
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07-09-2017, 11:18 PM | #8 | |
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Location: East Hartford, Ct
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Re: Piston Expanders?
Quote:
Witnessed and participated in a number of engine 'overhauls' using this method.
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DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES Last edited by 51 MERC-CT; 07-10-2017 at 06:27 AM. |
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07-09-2017, 11:55 PM | #9 |
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Join Date: Sep 2015
Location: Clarkdale, AZ
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Re: Piston Expanders?
Why does the description say "reproduction?"
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07-10-2017, 01:02 AM | #10 |
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Join Date: Apr 2015
Location: Sweden
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Re: Piston Expanders?
Lotīs of ways to "fix" things if labor was cheap.
Grinding pistons to undersize and reusing. Piston ring regroover and steel shims. |
07-10-2017, 02:30 AM | #11 |
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Location: East Hartford, Ct
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Re: Piston Expanders?
Isn't that a question for the seller of the product?
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07-10-2017, 03:22 AM | #12 |
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Re: Piston Expanders?
I had pistons expanded by shot blasting back in the 70/s.
Was a normal everyday job then. |
07-10-2017, 04:13 AM | #13 |
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Re: Piston Expanders?
You canīt get material worn away back again so what you get after knurling is a piston with less lifespan then a new one.
Back when labour was cheap and lack of parts was an issue i can get "fixing" stuff. |
07-10-2017, 06:25 AM | #14 |
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Re: Piston Expanders?
Sure, when an engine is rebuilt new pistons are used but when it is overhauled, knurling the piston extends it's lifespan, at a lesser cost. Call it the cheapest way but that's what people wanted, and it worked.
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07-10-2017, 07:52 AM | #15 |
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Re: Piston Expanders?
Perfect Circle had a knurling attachment for the lathe to knurl the skirts that would work for a while but today the hot setup is have the skirts coated by Swain Tech .
They can build up the skirts a couple of thousands. Sent from my iPhone using Tapatalk |
07-10-2017, 08:07 AM | #16 |
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Re: Piston Expanders?
I had a '70 Triumph 500 in the early 80's that had knurled pistons. I took it apart for other reasons, but it ran fine. First time I had seen them.....Mark
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07-10-2017, 08:52 AM | #17 |
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Re: Piston Expanders?
There were lots of ways to do the cheapest possible service on an engine - to get it back on the road and in the process, spending the least amount of dollars. Dang near every small town had somebody who "rebuilt engines" . . . everything from lawn mowers, to tractors, to cars. People didn't have money to spend and there was a lot of cheap labor available (young 'blue collar' folks) - without XBoxes, Computer Games and Texting to distract that 'cheap labor'. LOL
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07-10-2017, 10:15 AM | #18 |
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Join Date: May 2010
Location: QUICKSBURG VA
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Re: Piston Expanders?
I had a set of original Mopar piston expanders just like these for my 50 Plymouth but I didn't use them when I had the engine apart because the pistons still checked out very close to factory specs.
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07-10-2017, 10:36 AM | #19 |
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Location: Long Island,NY
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Re: Piston Expanders?
I have heard of knurling a piston to decrease the slop but these things I have never seen. So if I read it correctly, they actually expanded the piston, did these thing really work?
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07-10-2017, 11:09 AM | #20 |
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Location: Arkansas
Posts: 611
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Re: Piston Expanders?
I also knew about knurling, and have seen the little tooling parts for it. Then it looks like there was a setup for expanding pistons before you put them in. But these deals are a whole new idea for me.
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