Timing mark question.

[XCELLR8]

A quick question. The rebuilding book I'm looking at states to put the timing marks close as possible (i.e. crank gear 12 o'clock and cam gear at 6 o'clock) together. Reading on this site, this is wrong and that both marks need to be at the 12 o'clock position for the motor to be at TDC on #1 cylinder. The 12 o'clock position on both gears has the lobes on the cam facing away from #1 cylinder, so I'm thinking this is right, but am I? What is the correct timing mark set up?

Motor is a 400 BB

Thanks

 

[69Bee]

You are supposed to install the marks facing each other, then rotate the crank 360 degrees (one revolution) so that the cam mark is facing up.

 

[XCELLR8]

Ok, I got it. Thanks for the information.

 

[WileE]

May I suggest to degree the cam ? Start out with establishing actual TDC on #1.