Chevette L4-98 1.6L (1982)
Steering Gear: Customer Interest
Power Steering - Lack of Assist
Number:
84-74
Section:
3B (IX)
Date:
Feb., 1984
Subject:
RACK AND PINION POWER STEERING VALVE RING SERVICE
Model and Year:
1981-84 CHEVETTE, 1982-84 CAVALIER, CELEBRITY, CITATION AND 1984 CORVETTE
TO:
ALL CHEVROLET DEALERS
This bulletin supersedes the information given in Bulletin 81-T-47.
Orange color valve rings have been phased into 1984 production, replacing the green rings. The present green ring service kit, P/N 7840573, may be
used to replace orange rings as they are interchangeable.
The design intent is that valve rings will remain stationary in the bore of a power rack and pinion assembly. If hard steering, lack of assist when started
cold, etc., is encountered with normal pump pressure, inspect the rack and pinion housing valve bore (see illustration).
Ring contact marks in the valve bore is normal. If ring groove wear exists, replacement of the housing is necessary to assure that replacement rings will
not eventually wear further into the housing and result in a recurrence of a lack of power assist symptom.
If only one (1) or two (2) of the four (4) ring contact marks in the housing have resulted in ring groove wear, the corresponding ring land of the valve is
most likely causing excessive ring drag. Replacement of the valve as well as the housing would then be required.
In mid-1984, the rack and pinion housing valve bore will have a textured finish to further insure valve ring retention to the bore. The textured area in the
bore will be the circular band sealing ring surface corresponding to the four (4) rings in the valve body.
NOTICE:
1980-81 Citations power rack and pinion assemblies are to be serviced as instructed in Dealer Technical Bulletin 81-T-83.