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.
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HOMESERVICE MANUALSBUICK1968SPECIAL 4.1L ENG, ENG CD PS, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICALENGINE IDENTIFICATION1966 MODELSNOTES
1968 Buick Special 4.1L Eng, Eng CD PS, Automatic Trans
1966 Models: Notes
1968 Buick Special 4.1L Eng, Eng CD PS, Automatic TransSECTION Notes
| Code | Displ. & Carb. | Comp. Ratio |
|---|---|---|
| MK | 225" V6 2 Bbl. | 7.6:1 |
| MH | 225" V6 2 Bbl. | 9.0:1 |
| MM | 300" V8 2 Bbl. | 7.6:1 |
| ML | 300" V8 2 Bbl. | 9.0:1 |
| MX | 340" V8 2 Bbl. | 8.0:1 |
| MA | 340" V8 2 Bbl. | 9.0:1 |
| MB | 340" V8 4 Bbl. | 10.25:1 |
| MR, MV | 400" V8 4 Bbl. | 10.25:1 |
| MS | 400" V8 4 Bbl. | 11.0:1 |
| MT | 401" V8 4 Bbl. | 10.25:1 |
| MV | 401" V8 4 Bbl. | 8.75:1 |
| MW | 425" V8 4 Bbl. | 10.25:1 |
| MZ | 425" V8 4 Bbl. | 10.25:1 |
RENDER: 1.0x
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.