rayeve Posted April 23, 2015 Share Posted April 23, 2015 I was about to change the plugs in my 2001 Outback (non-turbo) at 90,0000. I noticed, however, there was some little bits oil on the plugs and a bit on the boots that cover them. Obviously, this is due to the O-rings drying out (the ones that meet the valve cover to the head to allegedly prevent this problem. BUT, my car was running like a Swiss watch when I started the plug change. I noticed the same thing when I changed the plugs on my wife's Legacy recently (at 150,000!). And her's runs perfectly. I've owned several Subarus that I drove to about 170,000 and never changed the O-rings mentioned above, and never had a problem with a misfire. So .... here's my question: Is it really worth my time, trouble and expense to pull the valve covers and replace O-rings and gaskets??? If it never seems to cause a problem, I lean towards the old saying "If it ain't broke, don't mess with it!" Has anyone on the board experienced misfiring or other bad behavior due to dry O-rings around the spark plugs? Thanks!!! Link to comment Share on other sites More sharing options...
Max Capacity Posted April 24, 2015 Share Posted April 24, 2015 No, like you said, if it ain't broke, don't fix it. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
amptramp Posted April 24, 2015 Share Posted April 24, 2015 Same thing when I changed plugs two days ago. Both front cylinders had large quantities of oil in the plug wells, but unless I run into another problem that requires me to pull the cam covers, things will stay as they are. Link to comment Share on other sites More sharing options...
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