Lumina V6-204 3.4L DOHC (1991)
Heater Hose: Customer Interest
Heater/Coolant Hose - Interference/Leaks
Number:
91-352-6B
Section:
6B
Date:
JUNE 1991
Corporate Bulletin No.: 136201
Subject:
INTERFERENCE, LEAK AND/OR NOISE WITH COOLANT RESERVOIR TO HEATER HOSE OR A/C COMPRESSOR
Model and Year:
1991 LUMINA
Condition:
# 1.
On both the 3.1L (LHO) and 3.4L (LQ1) engines. Interference between the heater outlet hose and the clip on the coolant
reservoir hose.
# 2.
Only on the 3.4L (LQ1) engine. Coolant reservoir hose cut by the A/C
compressor pulley.
Cause:
# 1.
The reservoir hose clip is located too low and rubs on the heater outlet hose.
# 2.
The coolant reservoir is not installed in one or both of the lower retaining
tabs, causing interference of the reservoir hose and the A/C compressor pulley. This may also be the source of a noise
condition.
Correction:
# 1.
Move the reservoir hose clip higher and forward by drilling a new mounting hole in the reservoir.
# 2.
Install the reservoir in the two lower retaining tabs and check the
clearance between the hose and the A/C compressor pulley.
PROCEDURE FOR CORRECTION # 1
1. Remove the coolant reservoir.
