It is recommended to use Nickel Anti-Seize on all spark plugs. It helps you to remove the plug without chance of breakage. I also recommend using some Dielectric grease around the porcelain to prevent heat from making your plug boots from sticking.
use just a little anti-seize on threads
Anti seize on the threads, and dielectric grease on the plug wire end. Check manufacturer reccomendations as some are against using anti-seize grease. Also anti-seize grease which contains copper could be not compatible(corrosion) with aluminium alloy engine head.
You do not have to but it will be very good if you place a die-electric grease on points where ignition wires contact spark plugs and distributor/coil pack.
0.54 and remember to use anti seize grease
My guess is that it is a 3.1L motor correct?? If so, you remove the spark plug wires from the engine bank closest to the front ( left bank ) then remove the plugs...the rear ( right bank ) is not acessable unless you remove the "dog bones" from the left bank. there should be a small bolt hole under the dog bones to put the bolt that you had removed into it to pull the engine closer to the front. then remove the wires from the right bank and remove the plugs. make sure all the spark plugs are properly gapped using a spark plug gapper.. highly recommend that you use dielectric grease on the insides of the spark plug wire boots to prevent seizing and corrosion, then on the spark plugs use a small amount of anti-seize grease on the threads of the plugs also to prevent seizing and corrosion
These have an alumnium head and sometimes the plugs can seize in the head. I suggest taking it to a shop where they can handle such a thing.
One at a time, checking your gap on each plug and putting never-seize on the threads. Make sure you change the plugs on a cold engine, there is a problem with them breaking off inside the block.
Remove the engine covers and carefully remove the ignition wires from the spark plugs, there are 12 of them, then remove the spark plugs with a 5/8 plug socket. Make sure the gap is correct on new plugs put a bit of anti seize on the threads then install the new plugs...
Use AC / Delco Platinum or Iridium long life spark plugs & use a "anti-seize" compound on the threads on installation. Best of luck!
The engine as delivered in a new car has all spark plugs, but a replacement engine almost never comes with spark plugs as they are considered a "consumable."
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.
having bad spark plugs could effect how the spark sparks and when it sparks. new plugs is never a bad idea