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GMC V6 and V12 Engines Engine repair and rebuilding |
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#1
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spark plug type for 351E
What kind of spark plugs are you using for the 351E (1966 GMC 2500 in my case)? The manual calls for an AC C44NS which far as I can tell is no longer produced. The auto parts store cross-referenced this to a Champion RN14YC (also called type 405) but in what little I've been able to find online I've also seen an RN11YC specified. I know the difference is heat range, but is that a 3-plug difference in heat range? Which one is ideal? What are typical plugs used for this application today?
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#2
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Re: spark plug type for 351E
I use NGK plugs in my 305E...I'll get some numbers for ya.
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"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#3
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Re: spark plug type for 351E
I used NGK Iridium from Advance Auto #6637 in my 1966 GMC 3/4T Pickup with a 351 V6.
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Clyde McKaba Abbeville,SC 1961 GMC Suburban 4WD 305 V6, 4spd 1966 GMC 3/4T P/U 351 V6, Turbo 400,Gear Vender OD 1969 GMC Suburban 1/2T |
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