305 sitting for years, low coolant and water in oil

[chillman88]

Originally Posted by Dead Parrot

Test the coolant for freeze point. Possible it froze at some point.

A 1/2 full radiator usually needs about a gallon of coolant to fill.

If the picture comes through it's the coolant tester. I'm honestly wondering if the water just evaporated over time somehow. Doesn't make sense being a closed system but it looks like straight antifreeze and reads as straight antifreeze too.

https://photos.app.goo.gl/YD4q5Zk3nMvmy4rr5

I added roughly a gallon of fresh premix.

Originally Posted by Dead Parrot

If you have time, after draining the oil and filling the radiator, let it sit for several hours or even overnight with the oil plug out. If there is a slow coolant leak, you should know by next morning.

Of course, you may know after a bunch of coolant comes out the oil drain hole.

Drain plug is out and no coolant coming out yet. It's sitting with the radiator cap on at an angle so it's fully vented to atmosphere.

Maybe I'll get lucky and it's just fine? Would be amazing.

Would you add anything to the initial oil change? A pint of diesel or something? Or just run it until it's warmed up and drain it hot? (assuming there aren't any fuel issues, last time I ran it might have just been fresh gas in the carb running and nothing from the tank).

I was planning on adding a pint of sta-bil and 5 gallons of ethanol free high test. Tank feels empty tapping on the bottom.