TSB's

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.

If an impact or other power tool is used to remove the oil pump sprocket bolt, the crankshaft sprocket may fracture and break.
<p>If an impact or other power tool is used to remove the oil pump sprocket bolt, the crankshaft sprocket may fracture and break.</p>

Use a socket and a breaker bar on the bolt. Always use a back-up wrench on the “width-across-flat” area of the oil pump shaft.
<p>Use a socket and a breaker bar on the bolt. Always use a back-up wrench on the “width-across-flat” area of the oil pump shaft.</p>

:

Note the location of the width-across-flat area of the oil pump shaft (wrench engaged).
<p>Note the location of the width-across-flat area of the oil pump shaft (wrench engaged).</p>

Close-up view of using a back-up wrench on the width-across-flat area of the oil pump shaft.
<p>Close-up view of using a back-up wrench on the width-across-flat area of the oil pump shaft.</p>

Tags: Nissan 
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