Scratched piston/sleeve reapir
 

there has been talk about doing piston/sleeve repairs.... I just so happen to repair a fair amount of engines, i basically just stick to working on CRE engines, But I figured I would show how I do some of the repairs....I am not much for describing things, so I will post the pictures and if anyone has any questions feel free to ask.....The engine pictured is a C6 USA...it lost the circlip on the exhaust side and took out the piston and put a healthy scratch on the sleeve... The piston unfortunately is too far gone for repair...But I think the sleeve can be saved.... I will find a used piston in the shop from a Nova/RB of that series and match it to the sleeve, or match the sleeve to the piston..... I can lap the piston smaller, or I can pinc the sleeve smaller..I own the RayA Racing tooling set ........I mainly use a flexi hone in my lathe for cleaning up the sleeve, It does a fantastic job .....

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RE: Scratched piston/sleeve reapir
 

and here is what I use in my lathe to do it

http://i107.photobucket.com/albums/m...ps74c59bdd.jpg

I also own the Raya Racing pinching tools and my own custom piston lapping die set...

RE: Scratched piston/sleeve reapir
 

Are you boreing the sleeve larger and then finding a piston to fit?

RE: Scratched piston/sleeve reapir
 

And here is a few more pics of that sleeve after honing.... this time I tried to get better depth in the photo...the results are quite nice


http://i107.photobucket.com/albums/m...psf8b098c3.jpg
http://i107.photobucket.com/albums/m...ps1fdc0a7f.jpg
http://i107.photobucket.com/albums/m...psb58818b2.jpg
http://i107.photobucket.com/albums/m...ps933bfd84.jpg

RE: Scratched piston/sleeve reapir
 

When I have to repair a piston, or resize a piston I use these here custom made lapping die's ...I have a die for every bore of engine I work with....I use 1200 grit clover lapping paste

http://i107.photobucket.com/albums/m...psb98e49c6.jpg
http://i107.photobucket.com/albums/m...psaaa2c578.jpg
http://i107.photobucket.com/albums/m...pse281b1c8.jpg
http://i107.photobucket.com/albums/m...ps0a79ff49.jpg

RE: Scratched piston/sleeve reapir
 

I decided to pass the piston thru the lapping die for a few minutes....just to show how it works with the 1200 grit.... if i wanted I could use much more aggressive abrasive and take it down substantially more..and yes that is a modified piston and rod....rod is lightened and so is the piston.... the circlip was still in the piston, but the dog leg snapped off


http://i107.photobucket.com/albums/m...ps435249d3.jpg
http://i107.photobucket.com/albums/m...ps08353115.jpg
http://i107.photobucket.com/albums/m...ps73db32fb.jpg
http://i107.photobucket.com/albums/m...ps1aa5bc63.jpg

RE: Scratched piston/sleeve reapir
 

more or less....except i am only honing the sleeve.... and I will find a piston of that style and I can either take the piston down to fit the sleeve, or take the sleeve down to fit the piston... I will likely use a piston from a P5 XLT...tho i will check my engine box and see if there is anything else suitable....

RE: Scratched piston/sleeve reapir
 

That's pretty slick!

RE: Scratched piston/sleeve reapir
 

Thanks for sharing.
The lapping tools are made out of garolite?

RE: Scratched piston/sleeve reapir
 

good eye !!!!! :D

RE: Scratched piston/sleeve reapir
 

This process is totally do able but by the time you put in all your man hours in , won't it far exceed the cost of a new piston and liner set? I could see this done on an obsolete engine where no parts are available.

RE: Scratched piston/sleeve reapir
 

not really.....what you see here took me all of 5 minutes to do...the piston/sleeve is worth about $200.00 with the mods.... so the 5 minutes is definitely worth saving a $200.00 piston/sleeve set..............