Coolant amount in radiator

[Emcd]

I can see the rows of fins when I look into the rad. Should all those be cover d with coolant? Or, does it need room to expand? Any issues with mixing new off the shelf red coolant in with the existing? If so, what coolant should I grab at NAPA?

 

[Sandroad]

Here's a recent thread on that topic. Radiator should be full to the cap. Expansion tank should have coolant between the low and full marks. I recommend using only the appropriate Toyota brand coolant (but others will disagree).

Coolant level in radiator

 

[aging fleet]

After replacing my heater Ts, I added coolant to the point where my fins were covered. After multiple heat cycles, the coolant level in the overflow tank has remained constant so it doesn't appear I overfilled it.

Adding coolant is fine but I personally stick to the Toyota LL premix. Good luck.

 

[Emcd]

Sweet, another trip to the toyota dealer.... At least it's only 10 miles away. I'll fill it up and call it good. Thanks for the help!