Head screw thread repair

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3 of the 10 cylinder head screws are placed with their bottom end directly to the airflow of the front. So these 3 screws are corroding from the bottom and destroying the threads of the engine block.



Bushings which are especially manufactured for the MA-motor series will be placed into the engine and can be replaced anytime if needed.


After counterboring the damaged thread, the new manufactured bushing can be inserted.

As you can see on the last pictures, there is no need to disassemble the whole engine.