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Cox Engine of The Month
July-2024
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
09 piston reset
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09 piston reset
How much play before you must reset? I have an 09 with a fraction of play, almost not noticeable.
mattp51- Moderate Poster
- Posts : 15
Join date : 2014-02-24
Re: 09 piston reset
That sounds OK to me , have you ran the engine much ? 0.002 is the correct tolerance some people have been resetting theres before the metal gets hardened from heat .
![Small Cox Logo](/users/3015/29/34/60/smiles/7356.png)
getback- Top Poster
Posts : 10276
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: 09 piston reset
And watch out for sloppy conrod big-ends...I have a couple of .09 Medallions that I thought had too much ball/socket slop. When In pulled them apart for reset, I found the ball/socket was ok. The big-ends have all the play. Even scoring used piston/cylinder sets (twice now) yielded worn conrods.
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Never enough time to build them all...always enough time to smash them all!
944_Jim- Diamond Member
Posts : 2000
Join date : 2017-02-08
Age : 59
Location : NE MS
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