Hi has anyone here done a cooling system flush on a 4.0 v6 and if so were did you put the 't' piece for connecting to your water hose, I did see a post in this forum a while back about doing a cooling system flush but I cant find it now.

 

You've got to cut into one of the heater hoses. Not sure which one, or if the water check valve(?) will be an issue. Previous owner of my van had one installed.

 

I didn't cut my heater core hose since I didn't want another place to possibly have a leak I went to the Home Depot and purchased some 3/4" or 3/8" can't remember rubber heater hose I removed the two heater core hoses from the water pump and installed the Home Depot hose across the two fitters where the heat core connected I then put the T-fitting on that loop hose.

Your better off doing it this way so that you can separately flush the heater core with a garden hose rather then pushing all the gunk in the engine through the heater core which will run the risk of plugging it.

 

Well, this method doesn't push anything through the heater core that is not already in it, so the tee in the regular location is fine. As far as leaks, I'm not concerned about the tee becomeing a leak location an more that the middle of a hose somewhere. So long as I keep them properly serviced, I don't worry about leaks.

 

hey krankshaft do you think you could do me a diagram of what you did because I am still not to sure were you have fitted the 't'-fitting or explain it in a bit more detail. Thanks cbr900.

 

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Krankshaft, I was thinking the exact same thing as CBR900! If you could post some type of diagram / photo, it would help. I am sure it's not hard to understand, but with a diagram (help me out here, CBR900?) there will be no misunderstanding concerning your suggestion. Thanks Krankshaft for any possible diagram on this matter... ED If not, I understand...

 

I'll post some diagrams sometime tonight.

 

Well there are two ways to do this the easy way and the hard way my way requires a little more effort.

The easier way is to splice the T fitting that comes with your blackflush kit into the heater core inlet hose. The heater core hoses are the hoses that run directly over the alternator on 3.0 engines. You simply cut the hose somewhere in the center and install the backflush T securing it with the screw type clamps included.

My way involves removing the two hoses from the heater core to the water pump.



You can see the two hoses behind that brass fitting on the left and right I took this picture when I had a coolant leak on a fitting that Ford claimed didn't exist so I had to make it myself from Home Depot.

The two hoses were originally held on by spring type clamps I would replace them while you are at it. The hoses will even after removing the clamps be stuck to the fitting nipples it will take some twisting and pulling to get them loose. I needed a vice grip to break mine loose.

Once they are off its time to prepare your loop hose from the coil of rubber hose cut 2 pieces about 16" in length. Between the two hoses install the proper T fitting and install the screw clamps on each side. Remove the black cap from the fitting and install the hose adapter.



From there simply install your loop hose over the two nipple fittings on the water pump I was able to install the hose without using clamps on the water pump fittings but you can use them if you wish.

Finally take off the radiator cap and push the filler neck fitting down into the filler neck.



You can also push the hose into the other end of the fitting so that you can channel the blackflushing coolant away from the engine.

After the engine is backflushed simply flush your heater core by putting your garden hose into one of the heater core hoses the sediment will flow out the opposite hose.

 

Hi Krankshaft. I see what you mean, mine is a 4.0 and you just cant get to the hose's from the water pump or t-stat, so I am going to have to put my 't' in between the two hose's from the heater coil and even they are hard to get at because the dryer for the a/c system is in the way, but I have to do something because my cooling system really needs cleaning out, my water is a horrible dark brown color.

 

Interesting

 

My coolant looked the same way it was still running on the coolant from the factory at 55K if the stuff didn't leak out due to the leak and the engine didn't nearly red line I wouldn't have flushed the stuff.

Just make sure that you put the T on the heater core inlet hose secure it with screw type hose clamps from both ends and make sure that the screw on cap for the T is tight you don't want all that coolant to just leak out .