The standard spark plug gap for a 1996 Subaru Impreza 2.2 L is 0.040. The gap is the distance between the tip of the spark plug and the electrode inside.
The spark plug gap for a 1998 Subaru Impreza/Legacy with the 2.5L DOHC engine is .044".
The spark plug gap for a 1995 Subaru Legacy is .044"
Usually 5/8 inch spark plug socket.
Follow any of the spark plug wires from the spark plug to the top of the engine and they all will meet at the coil pack
your rocker cover gasket goes around the sparkplug hole so it would be that leaking.
SPARK PLUG GAP1999 Subaru Truck Forester AWD 2.5L MFI 4cylThe Spark Plug Gap.044 (In thousandths of an inch)
The spark plug gap, for your 2000 Subaru 2.5 liter engine, is .007. Most spark plugs will be pre-gapped by the spark plug manufacturer.
Non-Turbo 2.5L- 1.0mm-1.1mm (0.039-0.043in)Turbo 2.0L- 0.7mm- 0.8mm (0.028-0.031in)
Check that battery has power. Check that coil pack has power and is grounded. Ground out one spark plug and see if there is any spark. If there is no spark, then it is either a fuse or your coil pack is bad. Rule out that the coil pack is good and that your spark plug wires are bad. Test them all individually. Don't get shocked by the 20K volts from the ignition, it really hurts.
44 thousandths
Spark plug gap according to Champion Spark Plug applications list is .044
.0440