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After you remove the plastic shroud and metal box directly below it you can gain access to the front three. As for the back, remove the connector and screw at the 7 o'clock position on the dist cap off to the side. You CAN reach the back three with two 6 inch socket extenders and without remvoing any other engine parts. Should take 30 min regardless of experience. I just did mine and I'm not a mechanic.

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โˆ™ 2007-06-28 00:31:02
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Q: Is it difficult to replace the spark plugs on a 99 Cougar and are special tools required or do any engine components need to be removed?
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