2 months ago on a hot day 102+ stop on hwy. i fill water, it start to run . no problem for another 200 miles. 2 weeks later, it stop again on hwy, i put water, start another 20 miles. Then died for gas. I fill gas strart to run. stop frequently. i put water and run slowly45 mph run to another 30 miles. Nexr day , i rive to local mechanics it stop every 5 minutes. mechanics told me, nothing wrong. some leak put some sealent . I drive again. it stop. I tow to shop. i did not start again until yesterday , after 2 months, start and run 20 min but stop again. leak is visible. What can i do?