Skylark V6-173 2.8L VIN X 2-bbl (1984)
area in the bore will be the circular band sealing ring surface corresponding to the four rings in the valve body.
NOTE:
1980-81 Skylark power rack & pinion assemblies are to be serviced as instructed in Dealer Information Bulletin 81-I-163 policy group,
number 6.
Service Precaution on Removal of Valve and Pinion Assembly:
Page 3B1-10,16 of the 1984 Chassis Service Manual list the procedure for valve removal and valve ring replacement. The valve must be pressed out of
the housing per the manual procedure. Excessive force or hammer use will likely damage the valve or valve pinion pin. After valve removal, inspect the
valve pinion pin for being loose, bent, or protruding beyond the valve machined surface. See Illustration. If any of these conditions exist, valve body
replacement is required.
2.
Rack Piston Information and Service
A lack of power assist symptom may also be caused by leakage past the rack piston ring in the housing tube bore. Inspect the rack piston ring for
damage or distortion. The piston ring-to-ring-land side clearance should not exceed .008". Also inspect the housing tube bore for any nicks, scoring
or other imperfection in the rack piston travel area.
Mid 1984 production will have an O-ring under the piston ring to expand the ring against the housing for improved ring-to-housing bore sealing.
See Illustration.
We have heard of some rack and pinion gear seal leakage after the inner rack seal was replaced. Some causes may be: water damage to the piston
rod from water intrusion past housing drive screw, refer to 83-198, Group 30 #11, lack of cleaning burrs from retaining ring groove, not using rack
seal bullet protector, or not properly protecting the inner rack seal from the rack teeth during installation. Protect the seal by sliding seal onto card
stock, and then slide card stock and seal down the rack teeth. See Illustration.
