F 550 2WD Super Duty V10-6.8L VIN S (2000)
Spark Plug: Service and Repair
Spark Plug -Thread Repair
Special Tools
CAUTION:
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The cylinder head must be removed from the engine before installing a tapersert. If this procedure is done with the cylinder head on the
engine, the cylinder walls can be damaged by metal chips produced by the thread cutting process.
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Do not use power or air-driven tools for installing taperserts.
Note: This repair is permanent and will have no effect on cylinder head or spark plug life.
1. Clean the spark plug seat and threads.
2. Start the tap into the spark plug hole, being careful to keep it correctly aligned. As the tap begins to cut new threads, apply aluminum cutting oil.
3. Continue cutting the threads and applying oil until the stop ring bottoms against the spark plug seat.
4. Remove the tap and metal chips.
