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Tractor Talk Discussion Forum

Are sandblasted plugs as good as new ones?

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David in Ohio

11-06-2006 14:53:29




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I have been sandblasting plugs on my Ford 8N and 860, and they look like new, but seem to foul more often after I have done this. Are sandblasted plugs as good as new ones. or should I stop being a tightwad and go buy new ones instead of sandblasting??




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Glen in TX

11-06-2006 21:44:19




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
Probably spend time cleaning air filter and money on a carb kit and then yeah later some new plugs and wires wouldn't hurt. Cleaning plugs can work fine for a while if it's a good plug but some plugs today are made by companies as throw away junk with bad cheap materials and cleaning doesn't help them after gas fouled. I've had good luck cleaning Denso brand plugs on natural gas engines but those burn much cleaner and don't get fouled like a gas fouled engine plug.

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Joe (Wa)

11-06-2006 21:00:14




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
Sand blasting abrades the surface of the porcelain around the center electrode. The porous surface accelerates carbon collection and fouling.

Joe



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doogdoog

11-06-2006 19:26:08




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
Aloha, Like RN said, the tip of the electrode has to be flat and square to the sides. The spark will jump better but it won"t be as good as a new one.

Mahalo,
doogdoog



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buickanddeere

11-06-2006 18:55:59




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
no



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PJBROWN

11-06-2006 16:02:32




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
I have a sand blaster for plugs and I like it.. I have a friend that works full time in a repair shop and he gives me heck about using it. He claims they do more harm to an engine than good. He claims you never can get all the sand out of the plug after and it only takes once to hurt the engine.



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RN

11-06-2006 15:55:44




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
File rounded ends of electrode to square surface for better spark, gap about .025 - or whatever gap recommended -and try again. RN



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old

11-06-2006 15:36:03




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
No there are not as good as when new after sand blasting them, but they do work. It all depends on how long they last after doing that as to it being the plug or being some other problem



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varmint

11-06-2006 15:34:28




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
i have some tractors with plugs that are probably 30 to 40 years old and they still work after sandblasted. you probly got weak fire or a poor spark or maybe some of both..



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varmint

11-06-2006 15:36:44




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 Re: Are sandblasted plugs as good as new ones? in reply to varmint, 11-06-2006 15:34:28  
what i meant was poor spark or rich carb mix or both.



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RAB

11-06-2006 15:14:56




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 Re: Are sandblasted plugs as good as new ones? in reply to David in Ohio, 11-06-2006 14:53:29  
What sort of fouling? Maybe the engines need some attention and you should not blame the plugs. They do an arduous job in a hostile environment. You may need a different heat range. Your carbs may need setting properly, or even overhauling. Your timing may need adjustment. The sparkie system may need a tune up. Your inlet valve guide seals may need replacing. Engine running temperature may be too low. You may not even work those tractors enough.
Can"t tell from your post, but please don"t just blame the plugs. Something else is wrong and may need attention to save more aggravation in the longer term.
Regards, RAB

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