Just check this thread - it has pictures and a good description. http://www.scoobymods.com/forums/showthread.php?t=3017
Follow recommendations in your owner's manual.
6000 miles
Yes, you should replace the spark plugs in your Forester at the intervals recommended in your owner's manual.
New spark plugs and possibly plug wires.
You have a four-cylinder engine with one spark plug in each cylinder.
you dont
Generally, to replace spark plugs on a Subaru vehicle, the spark plug boot should be removed. Then, the old spark plugs should be removed using a socket wrench, and replaced with new ones.
use a bendy extension with your plug socket on the end. Available in a good socket set such as Teng-Tools. Dan,
Have a look at ; www.carbasics.co.uk
you have to remove the washer bottle and the battery and the air duct then remove the coil packs then spark plugs easy
.0440
Changing spark plugs on a Subaru is no different from changing spark plugs on any other car. You may have to remove parts of the air induction system to make access easier. Be sure to check the gap on the new ones and use anti-seize on the threads.