V8 Radiator Drain/Fill Volume

[07V8]

I want to drain and fill the radiator and overflow bottle next weekend. Will 1 gallon of coolant suffice or do I need 2?

What has your experience been?

 

[Brian3676]

I want to drain and fill the radiator and overflow bottle next weekend. Will 1 gallon of coolant suffice or do I need 2?

What has your experience been?

Depends if you're draining the block or not as well. If you just draining what comes out of the radiator then I used just over 1g when I replaced my rad a few months ago.

 

[riverwolf]

If you do it right, you'll need 3 gallons. Draining the rad, overflow, and block, I removed ~11 of the 13 quarts Toyota says the system holds. Checking an old post, I said the block drains produced about half of that 11 quarts, so yes, if you only drain the rad/overflow then 2 gallons will do. However, you'll be leaving a lot of old coolant in the system.

There's a good writeup around here somewhere for doing the block drains. IIRC, all you'll need is a 24" socket extension, a wobble adapter, and the correct diameter vinyl hose for the banjo fitting. And the hose is optional...just depends on whether or not you want to take a coolant shower. ;-)

HTH.

 

[07V8]

If you do it right, you'll need 3 gallons. Draining the rad, overflow, and block, I removed ~11 of the 13 quarts Toyota says the system holds. Checking an old post, I said the block drains produced about half of that 11 quarts, so yes, if you only drain the rad/overflow then 2 gallons will do. However, you'll be leaving a lot of old coolant in the system.

There's a good writeup around here somewhere for doing the block drains. IIRC, all you'll need is a 24" socket extension, a wobble adapter, and the correct diameter vinyl hose for the banjo fitting. And the hose is optional...just depends on whether or not you want to take a coolant shower. ;-)

HTH.

Appreciate it. I'm going to do drain/fills ever 25-30k of radiator only going forward.