Coolant Flush

I took the radiator out of my Jeep to get a leak fixed, and noticed a small amount of debris in the upper hose. The radiator has been repaired, flushed, and pressure tested, and is not back in the Jeep yet. I would think I need to flush the block to get some debris out so it doesn't plug my radiator up at a later date. How do I go about flushing my block of all coolant and debris to get it up and going again? Open up the valve for the heater box for it to cycle through there, and wait for the motor to warm up then put the garden hose in the upper radiator hose and wait till the water that comes out the lower hose comes out clean and clear? Then bolt radiator back in and fill everything up? That sound about right? Any thoughts or words of wisdom? Thanks for the help guys.

 

there should be a drain on the side of the block, open it up or take it out and stick a hose an upper port and flush away.

 

okay, I have the 225 v-6, and you are saying there should be a plug from the factory that will thread out on the side of the block somewhere? just put the hose in there and blast away for a while till it becomes clean coming out the bottom radiator hose? what side is the plug on, and near the front or back of the block? Hopefully you aren't talking about the 4 cyl. Thanks for the help.

 

Just thinking. Wouldn't you be able to (also) flush through the heater hoses? And, if you took out the t-stat you could flush through the upper and lower rad hoses?

I would consider flushing from all the openings to all the other openings. For example, put your garden hose in the lower radiator hose and let the water come out heater hose 1, then heater hose 2, then the upper rad hose, etc.. Then put the garden hose in heater hose 2 and let the water come out each of the other openings one at a time. Repeat as needed.

I would forward flush before backward flushing also.

 

I don't think the 225 has a block drain.:v6:

 

Well, there are the freeze plugs. But that may be a bit more work than it's worth.

 

My 225 v6 has drains on both sides of the block. They are like the drain on the radiator. Think they are called petcocks.

 

In my opionion flushing is kind of a joke. I flushed mine but it wasn't until I replaced the freeze plugs on my F134 I realized how much crap is in there.

 

my :v6: has a pipe plug on either side of the block to drain it.