K 2500 Suburban 4WD V8-454 7.4L VIN N TBI (1995)
Intake Manifold: Service and Repair
Intake manifold tightening sequence 454
1. Disconnect battery ground cable, then drain cooling system.
2. Remove air cleaner.
3. Disconnect upper radiator and heater hoses at manifold and bypass hose at water pump.
4. Disconnect all electrical connectors and vacuum lines from TBI unit. Disconnect fuel lines from TBI unit.
5. Remove distributor.
6. Remove air conditioning compressor and front bracket, then position aside.
7. Remove rear air conditioning compressor bracket, then the right rear alternator bracket.
8. Remove emission sensors and bracket.
9. Remove intake manifold attaching bolts, then the intake manifold.
10. Reverse procedure to install, using new gaskets and seals. Tighten manifold bolts to specifications in sequence shown in Fig. 4.
