1997 Mercury Cougar Owner's Manual - Page 253
1997 Mercury Cougar Manual
Page 253 highlights
Capacities and Specifications Refill Capacities, Motorcraft Parts, and Lubricant Specifications Motorcraft Parts If a spark plug is removed for examination, it must be reinstalled in the same cylinder. For 3.8L engines: Cylinders #1, #2, #3 have an EG suffix. Cylinders #4, #5, #6 have an E suffix. For 4.6L (2V) engines: Cylinders #1, #2, #3, #4 have a PG suffix. Cylinders #5, #6, #7, #8 have a P suffix. If a spark plug needs to be replaced, use only spark plugs with the service number suffix letter as shown on the engine decal. 253
253
Capacities and
Specifications
Refill Capacities, Motorcraft Parts,
and Lubricant Specifications
Motorcraft Parts
If a spark plug is removed for examination, it
must be reinstalled in the same cylinder.
For 3.8L engines:
Cylinders #1, #2, #3 have an EG suffix.
Cylinders #4, #5, #6 have an E suffix.
For 4.6L (2V) engines:
Cylinders #1, #2, #3, #4 have a PG suffix.
Cylinders #5, #6, #7, #8 have a P suffix.
If a spark plug needs to be replaced, use only
spark plugs with the service number suffix letter
as shown on the engine decal.