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The correct plugs for the '81 and 82 EFI Imperials are Champion RN14LY, or
MoPar 68 ER, a Champion plug, as original equipment, (we went over this a
couple years ago). The TSB 08-14-81 revised the gap, (which was: 0.048" down
to 0.035" ), for some cars with "Driveability" problems during Warm-Up.
For cars without these problems, the original gap was fine - advantages
especially for lean mixtueres at speed. For '81 and '82 318 engines with
2BBL carb, the original plugs were MoPar 65PR or champion RN12Y. Chrysler
later recommended all plugs for these cars have a reduced gap. The "L"
symbol would be voided when the gap is reduced down to 0.035." All this
without a part number change. I still use the wider gapped RN14LY. 0.048,"
and they are fine. They burn clean and the gap does not erode at a fast
rate. The basic idea was sound.
Bob Harris
From: "Dick Benjamin" <DickB@xxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Monday, July 01, 2002 10:40 PM
Subject: Re: IML: SPARK PLUGS FOR 81-83 IMP
> If you prefer Champions (most prefer other brands), you would need to
> specify RN13LYC. The plugs you mentioned are perhaps correct for non EFI
> cars, I'm not sure. But for an EFI car, you want the "L" in there (it
> specifies the extended gap plug). The original plug, the Autolite/Mopar
> 68ER is no longer available, so you need to find the closest equivalent.
> The Autolite 945 is very close, but these are getting hard to find also.
>
> And don't follow your manual as to gap- the correct gap is 0.035".
> Dick Benjamin
> From: <Stan5907@xxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Monday, July 01, 2002 11:38 AM
> Subject: IML: SPARK PLUGS FOR 81-83 IMP
>
>
> > If the chapion plug were avilable what would i want to put in the car
> RN14YC
> > OR SHOULD I LOOK FOR RN12YC HELP
> >
>
>
>
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