The B061 Recall Campaign Bulletin relates to the 1975 to 1978 MGB. In addition to the B061 reference this is also documented as 78/Z/4 and this version includes updates to the original publication of B061 or 78/Z/4. The recall covers 3 main errors or problems. These relate to the catalyst, carburetor and overdrive gearbox.
Emission Related #
This describes how, due to a resonant vibration in the exhaust system occurring during normal engine operation may cause:
- A loosening of the exhaust manifold causing exhaust leaks
- A cracked exhaust manifold
- A cracked catalyst case
- Destruction of the interior matrix of the catalyst causing it to become ineffective in controlling exhaust emissions
- A deterioration of drivability due to power loss
Safety Related #
As a result of the vibration safety concern it is possible that the main fuel metering needle may break allowing it to shift and create an over-rich condition in the engine. The vibration may also cause the screws securing the carburetor float bowl to loosen and allow a seepage of gasoline and a potential risk of fire.
Overdrive Gearbox #
For overdrive gearboxes there is a possibility the of overdrive wiring harness coming into contact with the body, causing an electrical short and creating a potential risk of fire.
B061 Recall Campaign Bulletin #
Below is the full PDF of B061 Recall Campaign Bulletin. You may also want to review the Technical Service Bulletins.
Other Materials #
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