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Re: 2940 engine mystery

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11-20-2013 18:53:06

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I've used reman pencils for over 30 years with no ill effects. They seemed to last as long as new ones. The pintles and seats were reground.
However since new ones have gotten so cheap I have been using them.
Wonder if they are being made in China since they are cheaper than forty years ago.

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11-21-2013 05:26:43

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 Re: 2940 engine mystery in reply to D-, 11-20-2013 18:53:06  
I'd like to see some tech data on how pencil injectors are "reground." That would entail recutting the seat, recutting the valve face and then narrowing the seat back to factory specs. I'm not saying it now can't be done. I just have not seen any verifiable info on it. When we "reconditioned them" years back - we reamed out the orifices and used lapping compound on the needle and seat. It worked OK on injectors that were not all that bad to start with.

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11-21-2013 17:04:25

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 Re: 2940 engine mystery in reply to jdemaris, 11-21-2013 05:26:43  
I don't have any data. I just bought them and they worked very well.
I know what you're talking about though. Regular authentic Roosa-master diesel shops could not do the job.

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