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You use these to set the timing:
While carrying out the repair and the camshaft carrier is off the engine, you need to insert both cam locking tools into the camshaft carrier to ensure both the cams are correctly timed relative to one another. You can't do this with the camshaft carrier on the engine, you can only get the exhaust cam locking tool in due to poor access.

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While carrying out the repair and the camshaft carrier is off the engine, you need to insert both cam locking tools into the camshaft carrier to ensure both the cams are correctly timed relative to one another. You can't do this with the camshaft carrier on the engine, you can only get the exhaust cam locking tool in due to poor access.