Seal install went well. Opti is on and all sensors are connected with bellows installed. Crank hub is on but not the balancer portion. Water pump is not on yet.

Test start and it fired right up and calmed down to the set idle in about 10 seconds. Shut it off. No leaks but that's only 10 seconds run time.

Question: How long can I safely run dry cylinder heads (no coolant) from an ambient temp startup? 30 seconds, 1 minute, any idea?

Thanks