Kwhistle Posted December 14, 2009 Share Posted December 14, 2009 As I wrote elsewhere, I replaced the spark plugs on my 98 Legacy OB. I noticed that the old plugs wore unevenly, with #3 and #4 being in much worse shape than #1 and #2. Here's the picture. Does that mean anything, or is just normal wear? Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted December 14, 2009 Share Posted December 14, 2009 It could be a number of things really. From improper gap, to low compression. Hard to say. Quote Link to comment Share on other sites More sharing options...
OB99W Posted December 14, 2009 Share Posted December 14, 2009 Yes, that could be caused by a few engine ''problems'', including how tight the engine is in the compartment. It seems ''someone'' was complaining about that in http://www.ultimatesubaru.org/forum/showthread.php?t=106459 . Maybe only the front two plugs got changed the last time because the rears were considered too hard to get to by whomever did the work. Quote Link to comment Share on other sites More sharing options...
Kwhistle Posted December 15, 2009 Author Share Posted December 15, 2009 Well, that would make sense as to why the "rear" 2 plugs were practically gone. Haven't really thought of that. That said, the plugs are all NGK's double platinums, so assumed that they replaced them all at the same time. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.