Spark Plug Diagnosis

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Spark Plug Analysis

Postby g19605 » Tue Jan 30, 2007 4:13 pm

I use anti seize on plugs, wheel bolts/studs and lots of similar bearing surfaces particularly those that are subject to high temperature or corrosion. If temperature is not a problem I often use grease or oil -- but always something!
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Postby dracer398 » Tue Jan 30, 2007 10:12 pm

I use anti-seize also.

I think you are on the right track. I was thinking intake gasket or carb gasket. It has to be something common to all cylinders. If you notice the center electrodes on #'s 1,3 and 4 are white. #2 looks boarderline. Proper color should be tan.

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Postby WKPoor » Wed Jan 31, 2007 12:05 am

Something else to use that works great is milk of magnesia. Thats what we use on the aircraft ignitors and it is actually called out in some manuals. It dries to a harmless powder in the threads making removal much easier.
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Postby FCUBMAN » Wed Jan 31, 2007 2:00 am

It's good to know I'm not alone with using anti-sieze. The only risk, as I know it, is that you could short out a plug if you got some on the insulator accidentally. The milk of magnesia sounds like it wouldn't short anything out. But - what is the powder? Is it metallic? Magnesium, as the name suggests to me :?:
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