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 MANUALSCHEVROLET1985ASTRO VAN CARGO, 4.3 N, STANDARD, MH3REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICALENGINE REMOVAL - 4-CYLREMOVAL & INSTALLATION2.5L4WD MODELS
1985 Chevrolet Astro Van Cargo, 4.3 N, Standard, MH3
4WD Models
1985 Chevrolet Astro Van Cargo, 4.3 N, Standard, MH3SECTION 4WD Models
- Disconnect negative battery cable. Remove hood. Disconnect power steering reservoir at fan shroud. Remove upper fan shroud and fan. Drain cooling system. Remove upper and lower radiator hoses. Remove radiator overflow hose. Disconnect transmission oil cooler lines at radiator.
- Remove radiator. Remove A/C compressor and power steering pump and set aside. Remove air cleaner. Disconnect fuel line bracket at filter. Disconnect and plug fuel lines. Label and disconnect all vacuum hoses. Disconnect accelerator, cruise control and throttle valve cables. Remove heater hoses.
- Disconnect O2 sensor wire. Label and disconnect all electrical connectors on engine. Raise vehicle. Remove clips holding brake line to crossmember. Remove crossmember. Disconnect transmission cooler lines at flywheel cover. Disconnect drive shaft at front axle.
- Disconnect exhaust pipe at exhaust manifold. Remove flywheel cover. Remove drive belt splash shield, if equipped. Remove starter. Remove flex plate-to-converter bolts.
- Remove 2 outer air dam bolts (left side). Remove lower fan shroud. Remove left side body mounting bolts. Install jack stands. Raise left side of body and support with block of wood. Remove upper transmission mounting bolts. Lower body.
- Remove remaining transmission mounting bolts. Remove motor mount through bolts. Lower vehicle. Support transmission. Lift engine and remove ground wire and wire loom bracket at rear of cylinder head. Remove engine.
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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.