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Old 01-12-2005, 01:41 PM   #1
MomoWRX
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Default Which tool to gap spark plugs

I am picking up some NGK BKR7E spark plugs and want to know the best gapping tool.

gapping wire or feeler gauge? Which one do you find more accurate for measuring gap?
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Old 01-12-2005, 02:58 PM   #2
MustGoFast
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which plugs are those.. I had the NGK PFR7G's highly recommended to me for 1 stage colder .. these are of course the plats.. are those the coppers?
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Old 01-12-2005, 03:29 PM   #3
MomoWRX
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yea, how did you gap yours?
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Old 01-12-2005, 04:33 PM   #4
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Old 01-12-2005, 05:37 PM   #5
MomoWRX
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Unabomber, do you have a under $40 solution
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Old 01-12-2005, 06:53 PM   #6
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I am a bit older than many of you and back in the day we didn't have a fancy pants electrode gapping tools. Here is what we did:

I like to use the feeler gauge (not the wire gauge) as it provides more surface to test the gap.

I place the spark plug on it's head and use a small rubber mallet to GENTLY tap the "arm" down to the electrode just a little and test the fit with the gauge. If I go too far I GENTLY bend the arm back with a needle nose pliers.

If you are lucky enough to have an assistant near by they can hold the plug for you while you hold the feeler gauge between the arm and the electrode and gently tap it until it is flush on the gauge. It takes very little force to move the arm.

Be exta careful if you have iridium plugs as that tip can break very easily and then they are toast.

Spend the extra $40 on a pop and ice cream for the kids.

Jim
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Old 01-12-2005, 08:04 PM   #7
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Quote:
Originally Posted by MomoWRX
Unabomber, do you have a under $40 solution
Jim's post above is 100% correct, buy you DID state you wanted the best.
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Old 01-12-2005, 10:45 PM   #8
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http://buy1.snapon.com/catalog/item....re&dir=catalog

any auto parts store should have a gapper just like this.

usually 99 cents

I tried to find the snap on one I have, it has a part to adjust the arm.

Jay
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Old 01-12-2005, 10:46 PM   #9
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ah I found the mac version of mine.

http://www.mactools.com/ProductDetai...ItemNum=FG4450
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Old 01-13-2005, 01:37 AM   #10
MomoWRX
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nice thanks
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