Thread: Spark plug gap.
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Old 04-11-2026, 01:19 PM
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TommyGunn TommyGunn is offline
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Join Date: Mar 2026
Location: Sandy Oregon
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Default Spark plug gap.

I'm really disappointed in the 2 volume Pontiac service manual I bought. So far the things I need to know aren't in there. Nothing concerning windows, felts, rubber between front/rear glass(where b post would be),etc. Nothing about air cleaner "snorkel" - i have the piece missing between grill piece and cleaner. Found a Pic but not what it's called. I figured that one out. Latest disappointment- in tune up/maintenance section it doesn't even say what to gap the plugs at! Says to look at sticker on inside of hood- i don't have the sticker! I know with the HEI system it needs a bigger gap than with points but I've been reading everything from .045 to .085. Seems like .055-.060 is about right but I wanted to ask what you all set your gaps at? And any recommendations for decent service manual? Also what plugs are you using?
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Last edited by TommyGunn; 04-11-2026 at 01:29 PM.