Cooling System Bleeding Buick Roadmaster VIII

1. Leave radiator (or surge tank) cap off. Start and run engine until upper hose is hot. With engine at idle, add coolant until level is at bottom of neck of radiator or surge tank. Fill coolant recovery reservoir to COLD mark.
2. Install coolant recovery reservoir cap. Run engine until radiator inlet hose is hot. Add coolant to reservoir to maintain level. Fill coolant recovery reservoir to HOT mark.

Removal

1. Release fuel pressure. See «FUEL PRESSURE RELEASE»(ref-49883-S38259534942001011600000) . Disconnect negative battery cable. Remove hood and air cleaner. Drain coolant from radiator. Disconnect radiator hoses and heater hoses from engine. Remove upper fan shroud and fan assembly.
2. Remove serpentine belt. Remove power steering pump and A/C compressor, and position aside. Disconnect throttle cable. Disconnect cooler lines (if equipped) at radiator. Remove radiator.
3. Disconnect vacuum hoses. Disconnect engine wiring harness (including ground strap) at engine bulkhead. Remove windshield wiper motor. Disconnect ECM wiring harness.
4. Disconnect Air Injection Reactor (AIR) hose at pipe from converter. Remove MAP sensor (if equipped).
5. Remove distributor cap and distributor. Disconnect cruise control cable. Disconnect positive battery cable at starter. Disconnect negative battery cable at engine block. Raise and support vehicle.
6. Remove crossover pipe and catalytic converter as an assembly. Remove flexplate cover. Remove torque converter-to-flywheel bolts. Remove motor mount bolts. Disconnect fuel hose from front fuel pipes. Disconnect torque converter clutch wiring at transmission.
7. Disconnect transmission cooler lines at clip on engine oil pan. Remove transmission-to-engine bolts. Remove ground wires from rear of cylinder head. Lower vehicle. Support transmission. Install lifting device, and remove engine.

Installation

To install, reverse removal procedure. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . Fill and bleed cooling system. See COOLING SYSTEM BLEEDING .

1. Disconnect negative battery cable, and drain cooling system. Remove air cleaner assembly. Disconnect fuel lines at throttle body. Disconnect ECM wiring harness, and position aside. Remove upper radiator hose at thermostat and heater hose at intake manifold.
2. Disconnect brake booster hose. Mark and remove necessary electrical connectors and vacuum hoses. Mark and remove necessary fuel line clips and lines. Remove throttle cable bracket. Mark and remove spark plug wires at distributor cap. Remove EGR valve and solenoid. Remove distributor cap.
3. Mark distributor rotor position for installation reference. Remove distributor. Remove ignition coil and coolant temperature sensor. Remove A/C compressor brace. Remove intake manifold and gasket.

Clean gasket surfaces. Apply 3/16" bead of RTV Sealer (1052289) onto front and rear of cylinder block and 1/2" onto each cylinder head. Install gaskets and intake manifold. Tighten bolts and studs to specification in sequence. (Scheme 1) See TORQUE SPECIFICATIONS. To complete installation, reverse removal procedure. Adjust timing (if necessary) and check for leaks.

Scheme 1