Radiator - Leaks Due to Wear From A/C Line Insulation
89pontiac05Bulletin Number: 89-6-30
Reference Number: 971201R
Publish Date: 3/89
Subject: RADIATOR LEAKS DUE TO WEAR FROM A/C LINE INSULATION
Models
Affected: 1988 - 1989 SUNBIRD MODELS WITH C 60 AND 2.0L (VIN Code K) ENGINE
FIGURE 1:
Some late built 1988 and early built 1989 Pontiac Sunbird models could experience a condition of a radiator leak due to wear from contact with the muffler insulator wrapped around the suction/discharge line. The stitching on the insulator may rub into the radiator producing a leak. (Figure 1).
FIGURE 2:
FIGURE 3:
The suction/discharge line with this insulator (1988 p/n 22545477) was used in production from May 16, 1988 to build out and from Start of Production 1989 until November 21, 1988 (1989 p/n 22545191) at Lordstown Assembly on Pontiac Sunbird models only.
Lordstown Assembly began orienting the stitching away from the radiator (Figure 2) starting with VIN K7526198. Use of this insulator has now been discontinued and thinner individual heat protective sleeves (Figure 3) are currently used on the suction/discharge hoses.
Although only Pontiac Sunbird models manufactured at Lordstown Assembly used the "muff" insulator style hose assembly in production, the service part numbers listed above for Sunbird models ordered from GMSPO may or may not have the "muff" insulator. The "muff" insulator stitching must be properly orientated away from the radiator as shown in Figure 2 when replacing the suction/discharge hose assembly.