100 Quattro Sedan L5-2309cc 2.3L SOHC (NF) (1989)
Lifter / Lash Adjuster: Customer Interest
Valve Lifters - Noisy
Group:
15
Number:
91-03
Date:
April 30, 1991
Subject:
Hydraulic Valve Lifters - Noisy
Model(s): 80/90, 100/200
M.Y. 1988-1991
Condition:
Hydraulic valve lifters noisy.
Production:
A) Check valve in oil return passage (ENGINE BLOCK)
MC ENGINES
As of:
August 1987 (Gradual Introduction)
VIN:
44_JN007107
NF ENGINES
As of:
May 1987 (Gradual Introduction)
VIN:
44_HN120175
B) Length of intake valves increased by 0.5 mm
3A (4 Cylinder) Engines
As of:
November 1988
VIN:
89_KA108480
C) Introduction of P/N 034 109 309N hydraulic lifters. On all 4 and 5 cylinder engines.
As of:
1989 MY (SOP)
Service:
Do not replace hydraulic lifters for complaints of lifter noise where vehicle has not been driven for more than one week.
For verified customer complaints of severely noisy lifters, install lifters P/N 034 109 309R. These parts are in limited supply. Zone authorization for this
repair is necessary. (No authorization needed in Canada).
Note:
For replacement of valve lifters in circumstances other than described, original equipment valve litter P/N 034 109 309N has been replaced by P/N 034
109 309AD.