piston pin problem - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech piston pin problem

Print Thread

piston pin problem #1358756 12/24/12 11:59 PM 12/24/12 11:59 PM
Joined: Mar 2004 Posts: 300 St.Louis ,Mo. 7 72sat OP enthusiast
72sat OP enthusiast 7 Joined: Mar 2004 Posts: 300 St.Louis ,Mo.	I have some ford pistons that I want to put in a 440 block, that is bored .040 over. my problem is, the piston pin (1.040) is smaller than connecting rod pin hole (1.094).the pistons does not have pin locks. what would be the easiest way to put this togather.

Re: piston pin problem [Re: 72sat] #1358757 12/25/12 12:27 AM 12/25/12 12:27 AM
Joined: Aug 2011 Posts: 2,871 Pattison Texas CSK master
CSK master Joined: Aug 2011 Posts: 2,871 Pattison Texas	YOU would have to get the piston honed to fit the larger mopar pin 1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5

Re: piston pin problem [Re: CSK] #1358758 12/25/12 03:36 AM 12/25/12 03:36 AM
Joined: Nov 2009 Posts: 3,082 St. Paul , Mn. tubtar master
tubtar master Joined: Nov 2009 Posts: 3,082 St. Paul , Mn.	You could re-bush the small end of the rod and hone to fit. I did this on a set of 440 rods that went on a Boss 429 crank which was de-stroked. I am struggling to remember if it was a 1.04 or .990 pin I had for this deal. It was an odd ball collection of parts , but it did work.

Re: piston pin problem [Re: tubtar] #1358759 12/25/12 05:16 PM 12/25/12 05:16 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Just rebush the rods if the pins are floating, if pressed pins the pistons need machining to fit the bigger pins. R.

Re: piston pin problem [Re: 72sat] #1358760 12/25/12 05:44 PM 12/25/12 05:44 PM
Joined: Dec 2006 Posts: 2,118 Byron, NY W.I.N. Racing top fuel
W.I.N. Racing top fuel Joined: Dec 2006 Posts: 2,118 Byron, NY	Buy the correct pistons '01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd

Re: piston pin problem [Re: W.I.N. Racing] #1358761 12/25/12 05:59 PM 12/25/12 05:59 PM
Joined: Feb 2011 Posts: 1,454 Glendora Ca. J Just-a-dart pro stock
Just-a-dart pro stock J Joined: Feb 2011 Posts: 1,454 Glendora Ca.	Quote: Buy the correct pistons Are the valve reliefs in the right location?? etc. Last edited by Just-a-dart; 12/27/12 07:40 PM. "Just a Bracket car dressed up like a streetcar"

Re: piston pin problem [Re: Just-a-dart] #1358762 12/27/12 03:18 PM 12/27/12 03:18 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Easy to spend somebody else's money, isn't it? R.

Re: piston pin problem [Re: dogdays] #1358763 12/27/12 03:33 PM 12/27/12 03:33 PM
Joined: Dec 2006 Posts: 2,118 Byron, NY W.I.N. Racing top fuel
W.I.N. Racing top fuel Joined: Dec 2006 Posts: 2,118 Byron, NY	Quote: Easy to spend somebody else's money, isn't it? R. easier to help someone NOT spend their money on what is certain to cost more in the long run. '01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd

Re: piston pin problem [Re: 72sat] #1358764 12/27/12 03:48 PM 12/27/12 03:48 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	Quote: I have some ford pistons that I want to put in a 440 block, that is bored .040 over. my problem is, the piston pin (1.040) is smaller than connecting rod pin hole (1.094).the pistons does not have pin locks. what would be the easiest way to put this togather. Honing .050"+ out of each piston can get expensive. That's literally several hours of work. have you checked with a local machine shop to see how much that would cost. some of that material could be bored out, but i doubt most shops would have fixturing to do that. machine shop owner and engine builder

Re: piston pin problem [Re: dogdays] #1358765 12/27/12 03:57 PM 12/27/12 03:57 PM
Joined: Jan 2003 Posts: 75,089 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,089 A Banana Republic near you.	Quote: Easy to spend somebody else's money, isn't it? R. yes very ...

Re: piston pin problem [Re: JohnRR] #1358766 12/29/12 02:24 PM 12/29/12 02:24 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	So I reread the original post and there it was: pistons do not have pin locks. So now rebushing the rods doesn't work out so well, because the pistons have to be cut for locks as well. Somewhere in there, the desire to use a piston that is in hand is overweighed by the reality that precision machine work isn't cheap! Add to that the problem of valve pockets possibly cutting through the piston top and I have rethought my position to "Buy the right pistons!" Now IF you absolutely HAVE to use those pistons, rebush the rods and scare up a set of buttons to keep the pins in. And watch out for the valve notch problem. R. Speed costs money, how fast can you afford to go?

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1