crankshaft pulley bolt question

[vtecboy]

Hello,

Looking at the timing belt installation instructions, it mentions putting engine oil on the crankshaft pulley bolt before reinstalling it. whats the function of engine oil in that bolt?

I'm asking this because i replaced my timing belt a few weeks ago and i forgot to put engine oil on the bolt.

 

[EricG]

The engine oil properly lubricates the threads and bearing surface under the bolt head to reduce friction for proper wet torque specifications. If installed dry, it most likely is under torqued due to excessive friction.