Author Topic: 68 z/28 302 spark plugs  (Read 646 times)

pjbizjak

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68 z/28 302 spark plugs
« on: June 07, 2021, 08:40:34 PM »
what were the original spark plugs on a 68 z/28 mo engine? ac44, 45, or other? owners manual says ac 44 for 327, 302 not listed. I'm running ac 44's now.

bertfam

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Re: 68 z/28 302 spark plugs
« Reply #1 on: June 07, 2021, 09:33:19 PM »
The 1968 Chassis Service Manual (Specification section, Tune Up Chart) shows the standard plugs for the 302 was AC43 with the colder plug being the AC42-1C. It doesn't stipulate hotter.

Ed
Ed "Bert" Bertrand
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