On 1998-99 vehicles, the bolts rocker arm bolts are designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. Do NOT use a bolt which is stronger in this application. If the proper bolt is not used, the parts will not be tightened correctly, and part or system damage may occur.
Install the pedestal and rocker arm assemblies, then tighten the retaining bolts as follows:
1998-99 vehicles: 11 ft. lbs. (19 Nm), plus an additional 90° with a torque angle meter.
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(VIN 1, C, L and K) Engine
See Figures 2 through 9
Disconnect the negative battery cable.
Remove the valve cover, as outlined earlier in this section.
Remove the rocker arm pedestal retaining bolts, then remove the pedestal and rocker arm assembly and place it on a clean surface.
View Full Image Fig. 2: Unfasten the retainers, then remove the rocker arms
If necessary, remove the pushrod guide plate, then remove the pushrods.
Intake and exhaust pushrods are the same length. Store components in order so they can reassembled in the same location. View Full Image Fig. 3: Remove the pushrod guide plate ... View Full Image Fig. 4: ... then remove the pushrods View Full Image Fig. 5: Lay the valve train components out on a clean surface, in the proper orientation for installation View Full Image Fig. 6: Exploded view of the valve train components - 1.8L (VIN C) engine shown View Full Image Fig. 7: Rocker arms and related components - 1991-99 VIN L engine and 1998-99 VIN 1 engine View Full Image Fig. 8: Exploded view of the rocker arms and pivots - 1991 supercharged engine shown
View Full Image Fig. 3: Remove the pushrod guide plate ...
View Full Image Fig. 4: ... then remove the pushrods
View Full Image Fig. 5: Lay the valve train components out on a clean surface, in the proper orientation for installation
View Full Image Fig. 6: Exploded view of the valve train components - 1.8L (VIN C) engine shown
View Full Image Fig. 7: Rocker arms and related components - 1991-99 VIN L engine and 1998-99 VIN 1 engine
View Full Image Fig. 8: Exploded view of the rocker arms and pivots - 1991 supercharged engine shown
Clean the rocker arms and pedestal bolts in a suitable solution and inspect for wear. Make sure to clean all of the thread adhesive from the rocker arm pedestal bolts.
View Full Image Fig. 9: Valve train components - 1999 VIN K engine shown, later models similar
To install:
If removed, install the pushrods and make sure they seat in the lifter.
Apply a threadlocking compound to the bolt threads before reassembly.
1988-92 vehicles: 28 ft. lbs. (18 Nm).
1991-98 vehicles: 19 ft. lbs. (29 Nm), plus an additional 90° with a torque angle meter.
1999-99 vehicles: 11 ft. lbs. (19 Nm), plus an additional 90° with a torque angle meter.
Install the valve cover(s), as outlined earlier, then connect the negative battery cable.
Start engine and check for fluid leaks and listen for valve train noise.