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Spark Plug "tip"


Bob Ayers

Well-Known Member
Joined
Aug 28, 2007
Messages
2,274
City
Durham, NC
Vehicle Year
1999
Transmission
Automatic
When changing spark plugs, always use Motorcraft double platinum's, or fine wire platinum's. They are designed to be
the correct heat range for your 2.3L, 3.0L, or 4.0L engine, as well as Ford's EDIS.

A word of caution about gapping these plugs. On the double platinum's, there are platinum beads on the center electrode, as well as the outer electrode:

425569548_j8Auu-XL.jpg



425569209_a7SfM-XL.jpg



425569158_gJs5F-XL.jpg



Make sure you use the "wire" type of spark plug gauge, NOT the "circular" type of gauge.
When using the "wire" type of gauge, DO NOT use force to insert it in the gap, the platinum
beads can be easily damaged. To adjust the gap, bend the outer electrode close to the
spark plug threads.


Use one of these type of gap gauges:

http://www.sears.com/shc/s/p_10153_12605_00940816000P


http://www.sears.com/shc/s/p_10153_12605_00993925000P


DO NOT use this type of gap gauge:

http://www.sears.com/shc/s/p_10153_12605_00999827000P
 
I just bought a set of these... but they're not gapped right for the 2.3T engine.


Those require a .32-.36 gap.




That is, unless, I don't know how these platinums are designed to work. As well as being most effective.
 

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