Nissan crank sprocket caution
This TSB serves as a caution when servicing the engine oil pump sprocket on the 2007-2010 Nissan Versa equipped with the MR18DE engine.
NEVER use an impact or other power tool to remove the engine oil pump sprocket bolt. If an impact or other power tool is used to remove the engine oil pump sprocket bolt, the crankshaft sprocket may break.
Always use hand tools with a back-up wrench as described in Section EM, Timing Chain Removal and Installation in the Electronic Service Manual.