being a subaru noob and just having got my first one (gen2 liberty) i have just found out that you are supposed to run the "upper engine cleaner" in the engine.
i have changed the engine oil so far (as well as tranny and diff) so i figure i might give this a go as well.
i have searched around elsewhere and from what i can see i simply remove a vacum tube off the intake manifold and spray half the can in while the engine is off, wait 15 minutes then start the engine and spray the rest in while its idling.
is this correct?
i have also read that i can expect lots of white smoke?
is there anything i have missed?
is there any way i can stuff this up haha?
also i would like to change the spark plugs as well but have never done this. i am told that you have to be careful not to overtighten them. i do not have a torque wrench but i am told no one actually uses them anyways. what is the rule of thumb for tightening the plugs? how do i know when to stop tightening them, i assume too tight or not tight enough is bad.
Cheers
