If your tensioner is located on the outside of the left side of the engine block & can be removed from that side, be careful when you reinstall to first put piece by piece in. DO NOT ASSEMBLE TENSIONER OUTSIDE OF ENGINE & PUT IN.

Posts describe breaking camshaft when this procedure is done. Must reassemble the tensioner 1 piece at a time into the engine block. Otherwise the pressure on the chain will transfer to your camshaft & break it.

When I reassembled mine (inline 6, M104 engine) I noticed that the old spring was shorter than the replacement one (indicating that the spring had lost its ability to exert pressure on the tensioner).

Be careful!