I opened the petcock on my radiator and let it drain for 15mins, and then I put the coolant in the radiator directly. It would only hold 1/2 gallon of antifreeze. Do I ne ed to have the car running when adding the fluid to have it cycle all the way through?
First why are you adding it are you overheating? Just a question here for a regular coolant change after you add it you must run the engine to circulate it but when drain it if you didn't drain the engine also there's still fluid in there and that's why only a little bit did you remove the coolant bottle cap when draining it ? Also you obviously had the car jacked up so this raises the engine on an angle keeping a lot of fluid in and you need to remove the lower hose for it to come out on level ground
SOURCE: Radiator flush for my suzuki forenza.
For the do-it-yourself kind of mechanic, there is a kit sold by Prestone that will help you back flush the system using an ordinary garden hose. Available at most any auto-parts store, Walmart & such. It has the basic instructions on the container but I'll give you an overview.
You will need a large container to catch the anti-freeze coming out, You could drain it by removing the plug at the bottom of the radiator first , or remove the lower hose & get most of it out & then just flush the remainder, back-flushing is recommended.
There is a piece that fits into the radiator caps position that helps to aim the water towards a container but sometimes you can't use it due to size restrictions & limitations on space & have to catch the fluid with a drain pan as it overflows.
You will need to install a backflush connector "T". You simply cut into one of the 2 heater hoses, preferably the return line, and install that piece using 2 hose clamps to secure it. The garden hose hooks there.
The engine should be cool, you can crack a head or block by drowning a hot engine with ice cold water.
Just turn the water on slowly, once the anti-freeze stops coming out & it's just water, remove the drain pan & recycle what anti-freeze you can. Remember, most anti-freeze is fatal to birds & animals, including large dogs & children, so clean spills or at least dilute it with water until it is not a threat.
once done, drain the system & refill with the mix you prefer for your area, usually not less than a 50/50.
good luck.
SOURCE: 1997 Dodge Dakota Radiator drain plug
,m ake sure the radiator cap is off,oh or the radiator is clogged, remove lower radiator hose]and flush with garden hose
SOURCE: Can't find radiator drain valve on 2003 Buick Rendezvous
You will have to jack the car up and get under it to get to the drain valve, it is located on the back side of the radiator tank, drivers side, if not there then opposite side..
SOURCE: Heater not working
The Navigator has rear air, so coolant lines run to a heater core in the rear. It will help if you elevate the front of the truck on a set of ramps or incline. Turn the heat for both front and rear. Run the truck and add coolant as needed until all the bubbles come out of the coolant tank. You can tell when you get coolant to the rear when hot air blows from the vents. By raising the front of the truck you allow the the air in the lines to bleed to the front.
SOURCE: How do I flush the radiator
Well you can purchase a Prestone Flushing Kit, that includes a T valve with a cap that you can remove to connect a garden hose to, that you would install in line in one of heater hoses. Install the T valve, connect a garden hose to the T valve, remove the radiator cap and turn on the garden hose, once you have clear water coming out the radiator, turn off the hose and disconnect it and install the T valve cap. Then on the other tank that doesn't have the radiator cap, at the bottom of that tank, is a petcock, unscrew it to drain the radiator. Drain the water out and close the drain and refill the radiator.
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