s346k

just want to share. I flushed my cooling system this morning. brought on by a Tstat change a couple weeks ago, where I noticed poor quality coolant. despite the fact the antifreeze was bright green under the rad cap and overflow cap, what came out was surprising.

I broke the system up into 3 different flushes. the heater core, the radiator, and the engine. removed the Tstat then I disconnected both heater hoses and the upper rad hose at the Tstat housing. I disconnected the lower rad hose at the water pump.

I flushed the heater core both ways and wow, a bunch of crap came out. it would flush clean one way and dirty the other. I kept alternating hoses until it was all clean; took maybe 4 times each way. then I flushed the rad feeding thru the upper rad hose. not much bad stuff came out. engine wasn't holding much bad coolant either.

I drained everything I could and refilled with a Prestone and distilled water mix. I had no cooling issues before, simply thought a flush was in order due to the not so good coolant that came out when I swapped Tstats.

jmonts

I need to do the same thing. I have replaced all the hoses and will be flushing when I get a new water pump/tstat/tstat housing.
Did you just stick a water hose in to flush or did you use a cleaning agent?

ZINGGG

Perfect time to flush your heater cores with winter just around the corner. Just did mine a few weekends ago when I put on a Hesco water pump and high flow tstat housing.

s346k

I just used the hose.

edit: my heater worked *ok before. i noticed on the way in to work this morning it is a dragon now. dayum.

aviator

has anyone ever used CASCADE dish washing liquid as a cleaning agent? about 1 cup in the radiator, drive a couple of hours, drain. works great.

Cnwxj

I've used CLR before. How much flushing did you have to do?

s346k

I was afraid of using any kind of cleaner out of fear it'd break loose gom I didn't want floating around in there.

aviator

after running the CASCADE about 2 hours, I drained and refilled with water and antifreeze. no problems. wasn't a Cherokee but a IH Scout 340 V8.

black2000xj

i did this last fall on my 99 when i had it

i flushed the heater core

i put the bottom hose to the heater core into a empty milk jug to see if anything came out


i couldnt believe what i seen

i had chunks of ....well i dont even know what it was. It was bad

And yes my heater after would get hot enough to melt the dash it seemed

s346k

this lol

RTorrez1

If you do a regular flush on the cooling system as a regular maintenance item you shouldn't need to use any of those chemicals. I have never had to use any of that stuff since I bought my 98 XJ and I have never had a problem with the cooling system and I have had it for over 10 years now.

bigbadon

Yes,several times. Works better than any flush you can buy. Cascade is about the only thing that will clean up a system that had HOAT/OAT type antifreeze (G-05,prestone,dexcool) that turned into that famous brown mud. The proper method at GM dealerships is to use a acid followed with a neutralizer.

Creature85

How much CLR did you use when you flushed?

Anony

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