Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Number
Engine Production Code Number stamped on a pad just forward of right hand cylinder head. Number (example below) includes identification data as indicated. NOTE In addition to Engine Production Code Number, 327" and 409" engines will also have assembly plant designation (except Corvette - all built at St. Louis) and car sequence number part of car serial number stamped on engine number pad.
1 - Engine Plant. F Flint. T Tonawanda.
2 - Month of Manufacture: 12 December.
3 - Day of Manufacture. 10 Tenth.
4 - Code letters for engine displacement, transmission type, model application, and other equipment. See listing below.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.