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farny21
Joined: 30 Jan 2011
Posts: 2
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 Posted: Sun Jan 30, 2011 6:33 pm Post subject: picco boost .21 break-in |
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| just ran a tank at idle through it, 20% nitro and noticed aluminium on the glow plug so took the header off and looked at the cylinder and it had scuffing and it still has a tight pinch. is it bad or finish break-in, havent changed the needles and it was running rich, temp never got over 200F. |
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VWVR6_T
Joined: 23 Aug 2009
Posts: 384
Location: Western, PA
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| Posted: Sun Jan 30, 2011 8:10 pm Post subject: |
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Before do anything, remove the head and inspect the piston/sleeve and head for any anomaly.
For a Picco to brake it in may need between 1/2 to 3/4 of a gallon of fuel, they are very tight. With that been said, you should stop what you doing. You should see this video before do anything in your engine, http://www.youtube.com/watch?v=HPb7sOIBFck and http://www.youtube.com/watch?v=74TJZtbkdv4. Take a look at this videos a few times takes some notes if you need to and if you have any more questions or concerns, post it in here. Always, always make sure when you shut off the engine put the piston in lower position, why? because will extend the life of your engine. The metal expand when is hot and contract when cool down, the piston must be located in the lower position of the cylinder when cools down that way the sleeve when cools down don't compress the top portion of the piston that way you can prolong the life of your engine/protect the engine from losing compression. Hope this help. 
Last edited by VWVR6_T on Sun Jan 30, 2011 8:52 pm; edited 1 time in total |
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farny21
Joined: 30 Jan 2011
Posts: 2
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| Posted: Sun Jan 30, 2011 8:22 pm Post subject: |
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| VWVR6_T wrote: |
| For a Picco to brake it in may need between 1/2 to 3/4 of a gallon of fuel, they are very tight. With that been said, you should stop what you doing. You should see this video before do anything in your engine, http://www.youtube.com/watch?v=HPb7sOIBFck and http://www.youtube.com/watch?v=74TJZtbkdv4. Take a look at this videos a few times takes some notes if you need to and if you have any more questions or concerns, post it in here. Always, always make sure when you shut off the engine put the piston in lower position, why? because will extend the life of your engine. The metal expand when is hot and contract when cool down, the piston must be located in the lower position of the cylinder when cools down that way the sleeve when cools down don't compress the top portion of the piston that way you can prolong the life of your engine/protect the engine from losing compression. Hope this help. |
never had a problem with breaking in a engine, seen the good price on the boost and i race 1/8 truggy and got another truck and needed a engine. never had scuffing on brake ins on o.s or ninja's just thought id get any input on why, the little stinker is tight but must be scratches from being so tight and will go away when its fully broken in. and i always leave the piston at bdc. |
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