Trying to chase down a coolant leak. I bought a pressure tester and found a leak at the lower rad hose. Fixed that but the system still won't hold pressure ( rad hoses still soft/ no pressure after a 30 minute drive) I use the pump in place of the rad cap and after 30 minutes it has slowly dropped to 7-8 psi ( from 18psi) but can't find the leak?
Checked oil, all good, all I could find is one header bolt that shows signs of leaking at some point. I might drain down the rad and try resealing that bolt?
On the flip side it was close to 90 yesterday and temp was steady at 190 !