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 Removal: BUICK: 1970-73
Scribe marks around hood hinges and brackets and remove hood. Remove air cleaner, drain cooling system and disconnect battery. With A/C, disconnect wiring, remove compressor from bracket and position out of the way. Remove fan blade, pulley and belts. Disconnect all water hoses from engine and remove fan shroud assembly. Disconnect battery ground cable from engine. Remove power steering pump from bracket and position to one side. Remove and plug fuel pump hoses and disconnect all vacuum and emission hoses at engine. Disconnect body ground strap at engine. Raise car, disconnect starter cables and cable shield. Disconnect crossover pipe from manifold and support exhaust system. Remove flywheel and converter crossover. Remove flywheel to converter bolts and scribe marks on flywheel and converter for reassembly alignment, (not necessary on Man. Trans.). Remove transmission attaching bolts, remove nuts from motor mounts and through bolts. Lower car and support transmission. With lifting tackle attached, raise engine slightly so that through bolts can be removed. Disengage engine from transmission and lift engine from chassis.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.