Exhaust - Rattling Noise from Engine Compartment
90mazda06 Category FApplicable Model/s 1990 MX-5 Miata
Subject EXHAUST MANIFOLD HEAT INSULATOR BRACKET BREAKAGE
Bulletin No. 003/90
Issued 4123/90
Revised
DESCRIPTION
If you encounter a customer complaint regarding a rattling noise from the engine compartment, it may be the result of a broken exhaust manifold insulator bracket on the No. 1 cylinder side. When you find a broken bracket, replace it with the replacement bracket shown on page 2 of 2.
VIN OF PRODUCTION CHANGE
The thickness of the production bracket has been increased since the July, 1989 production.
JM1NA****L0113830 July 14, 1989
PARTS INFORMATION
PART NUMBER DESCRIPTION
B6Y0 13 468A Exhaust Manifold Insulator Bracket
NOTE:
Service part only.
REPAIR PROCEDURE
1. Get a new bracket (P/N B6Y0 13 468A).
2. Remove the exhaust manifold insulator.
3. Remove the faulty bracket from the exhaust manifold. Carefully remove the old bracket where necessary with suitable tool. Inspect the manifold for holes when finished.
4. Install the new bracket using the upper and lower nuts which fix the exhaust manifold at the No. 1 cylinder (refer to the illustration).
Tightening Torque of Nuts: 28-34 in. lb. (3.9-4.7 m-kg)
5. Install the insulator.
Tightening Torque: 69-95 in. lb. (0.8-1.1 m-kg)
WARRANTY INFORMATION
Warranty Type Code: A
Customer Comment Code: 82
Damage Code: 9A
Part No. of Main Cause: B6Y0 13 468A
Quantity: 1
Operation No: XX0359-R-X
Labor Hour: 0.4 Hr.