Quote:
Originally Posted by nickmckinney
The tolerances and clearances are no different than the pushrod motors they replaced.
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Mod motor clearances are pretty tight compared to the Ford pushrod stuff. A couple of the "high RPM" guys say that oil viscosity play a large role in how the lash adjusters work at high RPMs.
These are pretty tight:
main bearing oil clearance 0.0001 - 0.0018
rod bearing oil clearance 0.0011 - 0.0027
Aren't the pushrod mains 2-3 thousandths?