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Compression Check ?

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Old May 23, 2004 | 10:56 AM
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deadhorse
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From: IOWA
Compression Check ?
I want to check the compression on my 7 and reading about doing it I found some how-to's saying to place the checker in the upper spark plug holes and some say to place it in the lower. which is correct?
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Old May 23, 2004 | 11:02 AM
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Doesn't matter where you put it really, but the lower hole is best since it has the widest opening to the combustion area.
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Old May 23, 2004 | 12:07 PM
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the trailing spark plug holes are the ones you need to place the checker in. correct? thanks Aaron
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Old May 23, 2004 | 03:30 PM
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Lower = Leading
Top = Trailing
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