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 Code Location
Engine Code is stamped opposite number three cylinder on right side of engine block on all 4-cylinder engines. On 6-cylinder engines, number is stamped on distributor mounting pad on right side of engine block. On all V8 engines, number is stamped on front right side of engine block.
| Engine | HP | Code |
|---|---|---|
| 140" 4-Cyl. 1-Bbl. | 75 | CAB, CAJ, CAA, CAH |
| 140" 4-Cyl. 2-Bbl. | 85 | CAD, CAL, CAC, CAK |
| 250" 6-Cyl. 1-Bbl. | 100 | CCL, CCM, CCC, CCD, CCA, CCB |
| 307" V8 2-Bbl. | 115 | CHA, CHB, CHC, CHD, CHH, CHJ, CHK |
| 350" V8 2-Bbl. | 145 | CKX, CKA, CKC, CKK, CKY, CKL, CKS, CKW, CLT, CLU, CLW, CLX |
| 350" V8 4-Bbl. | 175, 190 | CKB, CKK, CKH, CKJ, CKR, CKU, CKZ, CLB, CLC |
| 350" V8 4-Bbl. | 245, 250 | CLD, CLH, CU CLM, CLR, CLS |
| 400" V8 2-Bbl. | 150 | CSA, CSB, CSC, CSD, CSK, CSL, CSM |
| 454" V8 4-Bbl. | 215, 245, 275 | CWA, CWB, CWC, CWD, CWJ, CWK, CWL, CWM, CWR |
Use the Manual With the Right Hardware
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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.
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