subaru outback 2012 spark plug and seals replacement, 斯巴鲁傲虎2012火花塞更换

a few tips after the job 1. remove both side fuel rail covers 2. loose bolts of fuel rail on both side, passenger side valve cover can be removed without touching the fuel rail, but it'll make the job much easier to loose it 3. clean the top of the gap as much as you can, make sure the pcv hole is blocked with something when using water, brake cleaner to clean. 4, check your grounding cable