Does that mean anything, or is just normal wear?
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Guest Message by DevFuse
Uneven plug wear
Started by
Kwhistle
, Dec 13 2009 08:10 PM
3 replies to this topic
#1
Kwhistle
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Posted 13 December 2009 - 08:10 PM
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?
Does that mean anything, or is just normal wear?
#2
Fairtax4me
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Posted 13 December 2009 - 10:52 PM
It could be a number of things really. From improper gap, to low compression. Hard to say.
#3
OB99W
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Posted 14 December 2009 - 09:18 AM
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.ultimates...ad.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.
. 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.
#4
Kwhistle
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Posted 14 December 2009 - 07:47 PM
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.
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