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Old 02-23-2004, 06:24 PM   #1
deyoungc
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Member#: 55211
Join Date: Feb 2004
Location: Fieldbrook,CA
Vehicle:
1999 Legacy Outback
White

Default spark plug wear

I just changed my spark plug/wires in my '99 Legacy Outback. It was the first time changed (60k miles). I noticed that cylinders 1 and 3 had a considerably higher amount of wear than those from 2 and 4 (1 and 3 had rounded center electrodes, where 2 and 4 still had a noticable point...the plugs were NGK double platinum). Is this common, or is there a problem with cylinders 1 and 3?
Any help or advice would be appreciated.

Thanks, Chad
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Old 02-25-2004, 01:19 AM   #2
Uncle Scotty
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OK Houston
we have an Uncle

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Somebody may have been lazy and just changed the 2 on one side......
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Old 02-25-2004, 02:59 AM   #3
xxtwowheelfiendxx
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Member#: 47597
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Location: Vermont
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1997 ///M3
'93 Impreza

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also might not of been gapped correctly. Did you gap the new ones you put in?
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Old 02-25-2004, 02:20 PM   #4
deyoungc
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Member#: 55211
Join Date: Feb 2004
Location: Fieldbrook,CA
Vehicle:
1999 Legacy Outback
White

Default spark plug wear

I didn't ask for the mechanics to change my spark plugs on my 30k check-up. So I would assume that they didn't touch the plugs.


As for gapping. I checked all the gaps in my new plugs and they were all pre-gapped at .041, which is in the middle of the recommended gap (.038-.043).
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