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Old 04-20-2006, 02:10 PM   #1
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1975 26' Argosy 26
Talbott , Tennessee
Join Date: Apr 2006
Posts: 1
Question 1975 Argosy MH 454 proper spark plug gap?

Hello all! I have a 1975 Argosy motor home on the p30 chassis with a 454 engine. Does anyone know the proper spark plug gap? The AC Delco plugs I bought came in at 0.056". TIA for the help.

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Old 04-21-2006, 12:06 PM   #2
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1986 34.5' Airstream 345
Louisville , Kentucky
Join Date: Feb 2003
Posts: 1,861
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My 454 in our 86 345 specifies .045". The specs are on the air cleaner label. Any Arg owners out there know if the gaps are the same?

Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
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Old 04-21-2006, 10:17 PM   #3
Rivet Master
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
Hello ,

the plug gap should indeed be .045 gap ,You may have been sold the wrong plugs . Have your parts guy double check the part # to be sure ,the heat range needs to be right , wrong plug ,wrong heat range too.That gap is an unusual size ,sometimes .060 gap is shown as correct.Pickup a haynes (brand) repair manual very good book ,check the specifications as listed for a 454 truck heavy duty service or p30 chassis.

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