1989 GT KY

Used the search function, didn't find an answer I could use. Anyway, changed the thermostat and flushed the coolant system. Just wanted to know how long I sould let the car run to ensure that all new fluids were mixed well?

mjr46

mixed well?? just run it until the t-stat opens up and you have good heat from the heater= system bled

1989 GT KY

That's what I did.. I just wanted to make sure that all the coolant in the block was the same "mix" that I tested in the rad. after flushing.. I did the flush with distilled water until clear and filled with Prestone straight, then 50/50, run for 20 minutes ('stat open, heater blowing hot) tested the coolant, all good....

Thanks

1989 GT KY

Also, what is the normal target reading you guys go for when testing? (i.e. -25, -40, etc.)

TIA

mjr46

depends on the area you live in and how cold it gets, here in MD -20 is more than sufficient, use a tester to verify where you're at

1989 GT KY

Cool, that's where I left it. Thanks man...