Hagen Brothers farms,Goodrich ND | No personal experience, but what I have read on the net is that early mod motors had only 2-3 sparkplug threads in the aluminum heads and would pull out those few fragile aluminum threads. There is a repair kit to install a steel thread insert without taking the head off and later engines come with more threads in the head to lessen the problem.
http://www.locknstitch.com/sparkpluginserts.htm |
Triton 5.4 longevity?
