- May 26, 2013
Hi Jim,Without the cutaway in the bottom of the spacer the insert would simply pull up to the spacer and stop.
Then you could get a very high torque reading but it would no longer be holding the head.
I have seen that happen on the engine, the stud nut torques fine but the head gasket blows because the thread in the head is actually stripped.
Actually I should have reworded it I guess. I didn't mean to test to failure, but maybe a margin for user error or torque wrench inaccuracies perhaps 20% over? What i don't understand is if the insert is flush with the surface and bottoming on the barrel or gasket why would it strip the thread in the head? Aren't the heads even strong enough to compress the gasket without fear of failure of the inserts (outer) threads?