Hi all newby here .2002 zd30 auto st .blew 1st motor 2 weeks ago 2nd motor same symptoms plus more? 1st one on each trip temp started sitting higher .motor blew at 3/4 on dash gauge up toowoomba range towing 5/8 trailer .2nd motor on trip back to brisbane temp kept risnig slight amounts .this was with new 160 thermostate and new alloy 4 core rad with two fans . Run very well on trip back.next day run well at idle. until 1/4 temp warmup and then grindy rattly run rugged like timing way out idle .stopped bad idle with temp swicth on dash turned on but starts again when turned of. And stops with small amount of throttle .