Remove the bottom hose, and the two head plugs? I want to get ALL the water out for the new Alum rad. Whats the best way?

Remove the drain plugs at the bottom of the sides of the block. You'll never get all the water out unless you circulate air through the motor to evaporate the trapped fluid.

Here's what Evans has to say about draining the system:

COOLING SYSTEM MUST BE DRAINED COMPLETELY, RADIATOR, BLOCK, HEATER!
Let the engine cool, set the heater control on maximum, and open the radiator drain. As soon as the expansion tank is empty, remove the radiator cap. On vehicles with block drains, remove the drain plugs and break through any sediment, which may be blocking the drain. Inspect drained fluid for rust and scale, if found flush as required (See Flushing and cleaning). For vehicles without block drains, remove the lower radiator hose at the radiator, remove the radiator drain cock and elevate the vehicle as required to drain the system To insure complete removal of old coolant, flush with Evans PREP fluid, or use the hot-purge procedure.

http://www.evanscooling.com/main1.htm

I removed the plugs on the sides of my BB and it poured out even though I thought I had most of it out. I tilted the motor on stand and more came out. I was flipping my motor over to replace the pan gasket so I wanted all the fluid out. If you are just replacing the radiator you dont need to get every last drop (IMO).

I removed the plugs on the sides of my BB and it poured out even though I thought I had most of it out. I tilted the motor on stand and more came out. I was flipping my motor over to replace the pan gasket so I wanted all the fluid out. If you are just replacing the radiator you dont need to get every last drop (IMO).


Thanks. I wanted to get most of the hose water out. With the new radiator I wanted to use ONLY distilled water and anti freeze.

You could always flush the old system first, that way even if something was left in the block it would be new coolant not old stuff.

Have you had your block drains out before?
They have a tednency to be a "lil snug" and sometimes have a healthy plug of rust behind them.

For next time, replace the plugs with radiator petcocks.

Have you had your block drains out before?
They have a tednency to be a "lil snug" and sometimes have a healthy plug of rust behind them.

For next time, replace the plugs with radiator petcocks.

This is the new motor Jim. The dirvers side I had out and installed a temp gauge. Pass never came out yet. When i put them in What should I seal the threads with? Teflon paste?

mnm, you put your temp sender in your block drain? I never thought of that. I used the one in my passenger head. Seems like kind of a pain to have to pull the sender each time you need to drain the block. I know it's not everyday, but still, it would get on my nerves, but then again, sometimes I'm lazy.

mnm, you put your temp sender in your block drain? I never thought of that. I used the one in my passenger head. Seems like kind of a pain to have to pull the sender each time you need to drain the block. I know it's not everyday, but still, it would get on my nerves, but then again, sometimes I'm lazy.

Hmmm..Block drain:confused: I used the plug in the head. Where is the block drain?

Hmmm..Block drain:confused: I used the plug in the head. Where is the block drain?
down at the bottom of the block, right above the oil pan on each side of the block. if it's stock, it will take a 6 point 9/16" socket and a ton of leverage and a few busted knuckled and associated swear words to get them out.