CRG Discussion Forum

Camaro Research Group Discussion => General Discussion => Topic started by: pjbizjak on June 07, 2021, 08:40:34 PM

Title: 68 z/28 302 spark plugs
Post by: pjbizjak 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.

Title: Re: 68 z/28 302 spark plugs
Post by: bertfam 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