Ok i just picked up a mint cherokee limited xj and doing the routine check ups i noticed the coolant is about as thick and mucky as it can get.Now my question is im going to replace the radiator,thermostat and rad cap this weekend but i want to flush the system(block,heater core,water pump) first.There is a 't' clamped into the heater hose for a garden hose to attach.

My concern is can i remove the old thermostat put the t-stat cover back without a thermostat in and remove the lower radiator hose to flush out the block? Using the garden hose at the t in the heater hose.

 

The absolute best way to flush the motor is with both the stat cover and water pump removed......stick a garden hose in the stat hole and flush crud out the pump hole. Surely u meant to say u were also replacing the water pump and fan clutch along with the stat, rad and cap, right? While the heater hoses are loose, stick the garden hose in 1 or the other heater hose to flush out the heater core. Don't take the chance of flushing crud from the core into somewhere else (other than a bucket). Personally, I would loose the "T", I've seem 'em leak.

 

That hose connector in the heater hose is risky business if you think the radiator is weak.
The cooling system on the Jeep is rated for just over 15 lb and your city water or well is putting out over 30 lb. (and probably more).
You might want to try one of the commercial radiator flushes. Follow the directions and they work well.

 

The radiator cap is rated to release pressure at 15-16 lbs psi. The cooling system components are rated higher. The "T" connection is supposed to be used ONLY when the rad cap is removed, so pressure in the cooling system (using a garden hose) will be very low. If one removes the stat cover and pump, there will be lots of flusing volume with virtually no pressure.

 

But you wont be able to collect the old coolant and sludge you're flushing out of the system.
If you don't care about such things, you should go right ahead.
But when your lawn dies and the dog croaks from drinking antifreeze, you know where to send the PM

 

Because someone told him to flush all the coolant without containing it, right? It isnt that hard to pop the lower hose to drain the system and catch most of it, yet still flush with a hose and only get a very minimal amount of coolant into the environment. It will be quite diluted as well.

 

and the sludge streak in the driveway and down the block?
There's your way, and there's the right way bud, he can choose for himself.

 

I live in a appt complex no lawn or dog lol but i do have a 55 galon drum i cut in half to put under the truck,fan clutch and water pump look semi new i bought the truck from a 71 year old lady so who knows, this isnt my first jeep either done this before but half assed it,so far im looking at doing what i said but remove the water pump aswell

 

The current radiator is wasted and leaks from both lower corners thats why im replacing it

 

I'm not sure how the neighbors are going to feel about you flushing a radiator in a parking lot they have to use too, or how/where you're going to empty a 55 gallon drum. But that's your problem, I'm just telling you how it's supposed to be done.
Since you're going to trash the water pump anyway, I don't see why you're worried about it, but you can do whatever you like. Just be ready for the consequences.

 

Marucco, take a chill pill. You told him to make sure to collect the fluid, and he said he was going to. And theres also a right and a wrong way to say things. Get off the kids back.

 

Most folks understand "catch your mess".....but then there's always one that must be a nag. LOL

 

From this post, I'd say he apparently missed that part, and I just wanted him to reconsider his options.
He seems big enough to handle the advice, how does this concern you?

 

"Because someone told him to flush all the coolant without containing it, right?"

That ^ my friend was sarcasm.

 

Everybody duck, it's still flying around.