A/C - Buzzing Noise Repair
89mazda10Category 16
Applicable Model/s 1987 RX-7 (ex. Turbo)
Subject CORRECTION & MODIFICATION OF A/C HOSE CLAMP
Bulletin No. 046/89
Issued 12/29/89
Revised
DESCRIPTION
Some 1987 RX-7 vehicles equipped with air conditioning systems may encounter a buzzing noise caused by the suction side of the A/C flexible hose vibrating against the firewall.
When this condition occurs, check the retaining clamp (0000-67-A43A-6A) to see if it has lost its crimping ability. If it has, it can be easily corrected by following the steps below:
1. Loosen nut securing the clamp to the hose bracket.
2. Crimp the clamp as shown in the illustration.
3. Retighten nut.
This will give the clamp better crimping ability.
A countermeasure clamp was introduced on March 23, 1987. The new and old clamps can be distinguished by checking the manufacturer's part number stamped on the clamp.
NOTE:
Mazda's part number has not changed.
WARRANTY INFORMATION
Customer Comment Code: A2
Damage Code: AP
Part Number of Main Cause: 0000-67-A43A-6A
Operation Number: U0705X-R-T
Labor Hours: 0.2 Hrs