Cylinder Head Assembly: Service and Repair

4-151
1. Raise and support front of vehicle, then drain cooling system and disconnect exhaust pipe from exhaust manifold.
2. Lower vehicle and remove oil dipstick tube and air cleaner.
3. Disconnect wire connectors and vacuum hoses from carburetor or TBI unit.
4. Remove EGR valve base plate from intake manifold, if applicable.
5. Disconnect heater hose from intake manifold, then remove AIR system discharge tube attaching bolt from intake manifold.
6. Remove ignition coil lower attaching bolt, then disconnect wiring from coil.
7. Disconnect all wiring from cylinder head and intake manifold, then remove engine upper support attaching bolt from engine strut.
8. Remove A/C compressor and position aside with refrigerant lines attached.
9. Remove alternator drive belt, then remove AIR pump bracket bolt from engine block, if equipped.
10. Disconnect throttle and throttle valve cables from throttle lever and intake manifold.
11. Disconnect upper radiator hose from cylinder head, then disconnect AIR hose from tube assembly, if equipped.
12. Remove rocker arm cover, then remove rocker arms and push rods.
13. Remove cylinder head attaching bolts, then lift cylinder head and intake and exhaust manifolds as an assembly from cylinder block.

Fig. 5 Cylinder head tightening sequence. 4-151:

Fig. 6 Typical intake manifold tightening sequence. 4-151 engines:

***UPDATED BY: 86-2 REISSUE DATED: Sept. 1986, 86-6(Gasoline)-4 DATED: Oct. 1985, and 86-6-4A DATED: Feb. 1986
14. Reverse procedure to install. Coat heads and threads of cylinder bolts with a suitable sealing compound, then install bolts finger tight. On 1982-84 models, tighten cylinder head bolts in sequence shown in Fig. 5 and for specific torque, refer to the Specifications Section. On 1985-88 models, tighten cylinder head bolts in sequence shown in Fig. 5 to 18 ft. lbs., then repeat sequence increasing torque to 22 ft. lbs. on all bolts exc. No. 9. Torque No. 9 bolt to 29 ft. lbs. Repeat sequence again, turning all bolts exc. No. 9 an additional 120 degrees (two flats) and bolt No. 9 and additional 90 degrees (1/4 turn). On all models, tighten intake manifold bolts in sequence shown in Fig. 6, if necessary.