Main bearing Oil Clearance?

[George Roffe]

JFormantes@aol.com wrote:

>Hi...I was checking out the haynes manual yesterday comparing all the
>specs together (main bearing oil clearance) I noticed that the older
>engines like E15/16 and Ga16DE has a larger clearances compared to
>SR20DE......why is that?

My guess is because the E15/16 and GA16 have a cast iron block.  The cast
iron block will expand less than the all aluminum SR20 block.

>Also can I run 0.0001 or 0.0002 inches of  piston to bore clearance on SR20s?

Nissan doesn't recommend it.  Why do you want to do this?

George Roffe
Houston, TX
http://www.nissport.com