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Old 10-13-2007, 08:14 PM   #1
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Default 1991 park ave

my girlfriend has one, and we're not sure when the spark plugs were changed alst (her dad bought the car about a year and a half ago for her), so i'm wiling to change them for her. Autolite platinums have served me well in the past, and others have said to use regular copper autolite plugs.

the store recommended the 605 (for her n/a series I), and for my motor (n/a series II) the 606. isn't the 606 one heat range colder? which would be better for a stock park avenue with a series I?

i ask because i like the advice i get here better than the parts store.
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Old 10-14-2007, 06:04 AM   #2
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Well i dont know the full answer to your question but I can tell you that if you look at my other posts you will find why I wont be buying Autolite platinums again... It broke... and No we did not tighten it down to far!
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Old 10-14-2007, 12:27 PM   #3
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WM, you should never use platinums in a supercharged car. Can you please put your year and model in your signature by editing your profile?

One heatrange colder won't hurt you, but use the stock gap.
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Old 10-15-2007, 04:29 PM   #4
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i worded my original post wrong, the 605'* are the one heat range colder ones. i'm probably going to go with the 606'*
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