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Old April 9th, 2012, 05:40 PM   #3
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If you have 100k on a 3 valve most Likely your gonna have issues. They have a 2 piece spark plug and the bottom half breaks off in the head. My local ford dealer recommends it at 40k before the plug seizes. At my shop I get a half hour additional per plug that breaks. I have heard stories from customers that the ford garage charged them 1200 dollars because the plugs broke. There are a few tools that are out that extracts the broken piece. I own the one made by Lylie and it seems to work pretty good. My snap on distributer claims its better than the snap on version.
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