Home Second Gen Mustang 1977 Ford Mustang 1977 Ford Mustang Tune-up Information Maintenance Schedule Maintenance interval 7,500 15,00 22,500 30,000 37,500 45,000 52,500 60,000 Change engine oil & filter every 6 month or mileage x x x x x x x x Replace spark plugs x x Change crankcase Emission filter x x Inspect accessory drive belts x x Replace PCV valve x x x x Change engine coolant at 6 months or at mileage x x Replace air cleaner filter x x Check belat, hoses & clamps x x check exhaust heat shields x x Lub steering and suspension x x x x Inspect breaking system x x Inspect & replace front wheel bearings x x Year Engine Spark Plugs Distributor Timingº Intake Valve opens Fuel pump press Idle speed Cyl cid rotation Type Gap Dwell Gap Man A/T Man A/t 1977 (note 3) 140 CW AWRF 42 .034 * * 6B 20B 5.5-6.5 800 800 170 CW AWSF 42 .034 * * 8B 12B 3.4-4.5 700 700 302 CCW ARF52 .050 * * 12B 4B 5.5-6.5 700 700 140 Calif CW AWRF 42 .034 * * 6B 20B 5.5-6.5 750 750 170 Calif CW AWSF 42 .034 * * [8] [8] 3.4-4.5 750 750 302 Calif CCW ARF 52 6 .060 * * [8] 12B 5.5-6.5 700 700 * Not applicable, solid state ignition No Subscription? You’re missing out Get immediate ad-free access to all our premium content. Get Started Already a Member? Sign in to your account here.