Cooling System Bleeding: Removal & Installation Chevrolet Venture I

Removal

1. Disconnect battery cables. Remove throttle body and air inlet duct. Disconnect cruise control cable, and position aside. Remove accelerator control cable. Drain cooling system. Disconnect radiator hoses and heater hoses from engine. Remove engine mount struts.
2. Release fuel pressure. See «FUEL PRESSURE RELEASE»(ref-97376-S15887341412001050300000) . Disconnect fuel lines at quick disconnects. Disconnect necessary electrical connectors and vacuum lines from engine. Disconnect brake booster hose.
3. Disconnect transmission shift control cable and A/C lines. Raise and support vehicle. Drain engine oil. Disconnect wiring harness grounds. Disconnect exhaust/converter pipe from right exhaust manifold. On AWD Aztek, remove rear drive shaft. Remove front wheels.
4. Remove lower radiator baffle. Remove inner fender splash shields. Remove stabilizer shaft links from lower control arms. Remove tie rod ends from steering knuckles. Remove lower ball joints from knuckles. Drain transaxle fluid.
5. Remove transaxle cooler lines and bracket from transaxle. Remove drive axles from transaxle. See appropriate FWD AXLE SHAFTS article in DRIVE AXLES. Wire drive axles to steering knuckles. CAUTION: Failure to disconnect intermediate shaft from rack and pinion steering gear stub shaft can result in damage to steering gear and/or intermediate shaft. This damage can result in loss of control of vehicle.
6. Remove pinch bolt/screw at intermediate shaft. Remove intermediate shaft from steering gear. Support engine/transaxle/frame with transaxle table. Remove frame-to-body bolts. Raise vehicle, to separate engine/transaxle/frame from vehicle. Remove starter. Remove flywheel-to-torque converter bolts. Install engine hoist. Remove engine-to-transaxle bolts. Remove engine.

Installation

To install, reverse removal procedure. Tighten nuts and bolts to specification. See TORQUE SPECIFICATIONS .

1. Disconnect negative battery cable. Drain cooling system. Remove air cleaner ducts.
2. Remove accelerator and cruise control cables with bracket from throttle body. Remove front spark plug wires. Disconnect harness connectors, vacuum hoses and coolant hoses from throttle body. Remove ignition coil bracket with coils and canister purge solenoid.
3. Remove Manifold Absolute Pressure (MAP) sensor. Disconnect and remove emission control vacuum harness. (Scheme 1) Remove EGR valve and generator front and side brackets. Remove upper intake manifold retaining bolts. Remove upper intake manifold. (Scheme 2)

To install, reverse removal procedure. Tighten nuts and bolts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

Scheme 1

Scheme 2

1. Disconnect negative battery cable. Remove upper intake manifold. See «UPPER INTAKE MANIFOLD»(ref-97376-S32697407952001050300000) . Remove valve covers. See «VALVE COVERS»(ref-97376-S25675689032001050300000) . Disconnect harness connectors from intake manifold components. Release fuel pressure. See «FUEL PRESSURE RELEASE»(ref-97376-S15887341412001050300000) . Disconnect fuel lines from rail. Remove fuel rail.
2. Unbolt power steering pump from front cover, and position aside. Disconnect upper radiator hose, heater hoses and thermostat by-pass hose from lower intake manifold. Remove lower intake manifold retaining bolts. Remove lower intake manifold. Loosen rocker arms and remove push rods to remove lower intake manifold gaskets.

Note. When replacing lower intake manifold gasket, a revised intake manifold gasket has been introduced by manufacturer. This new design gasket helps resolve issues related to intake manifold oil/coolant leaks. The gasket requires a revised torque specification and procedure in addition to the use of NEW revised intake manifold bolts. Please review TSB ENGINE OIL OR COOLANT LEAK (INSTALL NEW INTAKE MANIFOLD GASKET) for complete information.

1. Clean all gasket mating surfaces. Install lower intake manifold gaskets. With the gaskets in place, apply a 0.31-0.39" (8-10 mm) drop of GM® RTV sealer (12346286 US; 10953472 Canada) or equivalent to the 4 corners of the intake manifold-to-block joint. Connect the drops at both ends on the ridge where the front and rear of lower intake manifold contacts the block with a bead of RTV sealer that is 0.31-0.39" (8-10 mm) wide and 0.12-0.20" (3.0-5.0 mm) thick.
2. Install push rods into original position and tighten rocker arms to specification. See «TORQUE SPECIFICATIONS»(ref-97376-S22960383202001050300000). Install lower intake manifold. Apply Sealant (12345282) to bolt threads.
3. Hand tighten vertical bolts. Hand tighten diagonal bolts. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(ref-97376-S22960383202001050300000). (Scheme 3) To complete installation, reverse removal procedure.

Note. An oil leak may result if vertical bolts are not tightened before diagonal bolts.

Scheme 3