View Single Post
Old 04-19-2017, 05:05 PM   #7
Dave in MN
Senior Member
 
Dave in MN's Avatar
 
Join Date: May 2010
Location: Jordan, MN
Posts: 1,411
Default Re: INSERT ENGINE FROZE UP ! 31 Model A fordoor

When you are adjusting down to a .0002" increment, the suggested housing bore tolerance range is more than this amount (2.5 times) and the varying crush on the insert changes the clearance more than this safe range. Add the crank grind range the bearing supplier suggests for the main journals and you are way beyond what I am comfortable with for a variance. So, no I find it is not. I clearance every crank I set if necessary by final honing the actual aluminum insert. It is the only way I can provide enough oil clearance without overshooting the upper limit and having a bit of a leak. JMO and what works for me. Others may have different methods that work for them.
My comments are in regard to aluminum lined inserts, not tri metal inserts.
Good Day!

Last edited by Dave in MN; 04-25-2017 at 12:37 PM.
Dave in MN is offline   Reply With Quote