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I don’t remember that being the case.
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#2
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A Longer thread protruding into the cylinder, if clogged up with carbon, would be very difficult to remove.
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Yes I can get to that but why not the same thread length ?
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#4
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The NGK AS-6 shielded plugs I have removed from the w670 engine has a thread length of 8.46 mm to the crush washer but the threaded hole for the plug has a thread length of 14.41mm so the electrode of the plug is within the confines of the hole not protruding in to the combustion chamber ?
On the six w670 engines I have worked on all plugs have this shorter plug thread to head thread length! Last edited by Mark Robinson; 11-02-22 at 22:07. |
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