suzi cam seized


New Member
Hi guys,my mate has a collection of sierras and lj80 that he potters around on his property.2 of them have seized the cam at the front of the head and broken the timing belt.They all get regular oil changes and I have pulled both rocker covers off and there is no sign of sludge build up ect,so does anyone know if this is common and why?Also are they free spinning motors or not