New Used Radiator Cleaning

[Russ in California]

Purchased a used rad from local bone yard for our 91 lc. Degreased exterior and painted.
What can I do to the insides other than flush with the hose? Little bit of a lite colored crusty buiild up inside.
I think this ones been recorded because the bracket to core bolts have 13mm heads. Not typical Toyota.
Thanks,

 

[gnob]

Would run a hose in the top and monitor flow to bottom. If flow matches I would move on.
If you're worried. Fill it with water and radiator cleaner and let sit for an hour or two. Then reflush,

 

[Russ in California]

Excellent.
Thanks,

 

[Kief]

Aftermarket radiatiors typically have 13mmbolts. I second what gnob said.

 

[Russ in California]

Kief
I agree except the upper tank had an OEM Toyota on it.
Still, we know this one fit.

 

[Andersej]

Hot water and some borax flush and repeat a few times.