Very necessary for my 3.6 GMC Acadia . Had to replace the VVT sprocket and they are recommended for the job. However, they allow the cam to move far enough to skip a tooth, but once the cams have expired they can be used as a reference point to reposition the cams. It is better to use a hex wrench when replacing VVT sprockets. The locking tools prevent the cams from moving after the chains are removed.
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π§ DPTOOL Engine Timing Tool Kit for Audi VW 1.8 2.0 TSI/TFSI EA888 - T10352 T40196 T40271 T10368 T10354 T10355
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