coolant change [Archive] - Forum


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05-16-2007, 02:24 PM
Can some one post a how to on changing and recovering engine coolant?

05-16-2007, 03:32 PM
to the best of my knowledge, the best way to drain all the coolant is to pull the**** out of the lower right side of the radiator...(IF YOUR LOOKING STRAIGHT AT IT)...drain the coolant from there, also...there will be coolant in the block as well, there are block plugs on the motor, on the side of the block, i dont have pics, someone else might, pull them out...(1 on each side) thats how you get all the coolant outa the block,when you put the bolts back in, put some thread sealer on them... as for the heater core, nothing i can really imagine how to drain that, itll just get flushed....filling up the coolant system, fill the recovery tank and keep filling until it wont fill the car...make sure you turn the heat all the way on on hot, this will open the valve for the heater core and you can get circulation and no air pockets...while the engine is running, open the bleeder valve on top of the black pipe thats close to the waterpump...again..I DONT HAVE PICS, someones probably got pics on here...leave the bleeder open until its a straight stream of coolant coming out...close it, wait a little more...5 min, open it again just to make sure all the air bubbles are out of the system...and your done, anyone else got another way?

05-25-2007, 08:15 AM
when the bleeder is open am i suppose to be loosing coolant?

Also wht should i use to recover the coolant?

05-25-2007, 05:02 PM
when the bleeder is opne,,,yes your suppost to lose coolant, its bleeding the system, just wrap a towel around it, thats what i do...

05-25-2007, 07:21 PM
can someone please post pics of where all of these plugs are cus i cannot find them at all

05-25-2007, 07:26 PM
Draining and Filling Cooling System

Draining and Filling Cooling System

Caution: As long as there is pressure in the cooling system, the temperature can be considerably higher than the boiling temperature? Of the solution in the radiator without causing the solution to boil. Removal of the pressure cap while the engine is hot and pressure is high will cause the solution to boil instantaneously possibly with explosive force-spewing the solution over the engine, fenders and the person removing the cap.

Before draining and recovering; the cooling system. inspect the system. Perform any service needed to ensure that the system is clean, does not leak aired is in proper working order.
Some coolant manufacturers are mixing other types cat glycol in their coolant formulations; propylene glycol is the most common new ingredient. Propylene glycol is not recommended for use in GM vehicles that were manufactured with GM Goodwrench Dex-Cool.
A hydrometer will not always provide a correct measurement of freeze protection when anything other than ethylene glycol and water is being tested. The degree of inaccuracy will vary depending on the proportion of other glycols present in the coolant Hydrometers test the amount of glycol in a mixture by measuring the specific gravity of the mixture. The higher the concentration of ethylene glycol, the highest float balls go in the hydrometer. This in turn indicates better freeze protection Because ethylene glycol and propylene glycol do not have the same specific gravities, hydrometer readings of mixture containing propylene glycol give incorrect values.
It is recommended that a refractometer be used testing coolant. Refractometers test for the amount if of glycol in a coolant mixture by measuring the speed of light as it passes through the fluid and ale not affected by the specific gravity of the glycol

Draining Procedure

Park the vehicle on a level surface.
When the engine is cool, remove the surge to cap by following these steps:
2.1. Slowly rotate the surge tank cap counterclockwise about a 1/4 turn and then stop.
2.2. Wait until any residual pressure is reliever Residual pressure is indicated by a hissing sound.

2.3. After all hissing stops. continue to rotate it, surge tank cap counterclockwise until the cap is removed.

Important: For procedures requiring the cooling system to be partially drained, opening the radiator drain valve should provide sufficient draining. No further actions should be necessary.

Use a 1/2 inch square drive or a 3/16 inch hex drive to open the radiator drain valve. The radiator drain valve is located at the bottom of the radiator tank.
Remove the engine block drain plug.
Allow the coolant to drain completely.
Inspect the drained coolant.
Flush the cooling system if the coolant is discolored.
Continue with the filling procedure if the coolant appears normal.
Refilling Procedure

Close the radiator drain ****.
If previously removed, install the engine block drain plugs. When installing the drain plugs, use pipe sealer GM P/N 12346004 (Canadian P/N 10953480). Important: On vehicles equipped with the 3.4L engine, open the coolant air bleed valve. The coolant air bleed valve is located on the top of the thermostat bypass pipe/heater pipe assembly. Close the valve once a continuous stream of coolant is expelled from the valve.
Fill the surge tank to the base of the filler neck.
Start the engine with the pressure cap off. Run the engine until the upper radiator hose starts to get hot.
If the coolant level in the surge tank is low, add the proper mix of coolant until the level reaches the full cold line.
Important: After servicing the cooling system, and if the vehicle is equipped with an intermittent low coolant light, an occasional low coolant light may be encountered during some extreme driving maneuvers. This complaint should be eliminated by removing the surge tank cap and adding coolant to a level just at or above the full cold line when the system is cold.

Install the cap onto the tank with hand tight pressure. Recycling Procedure Important: Dispose of used coolant in a proper fashion, such as in a used coolant holding tank. Never pour used coolant down the drain. Ethylene glycol antifreeze is a very toxic chemical. Disposing of ethylene glycol antifreeze into the sewer system is both illegal and ecologically unsound. There is currently no approved method for recycling used DEX-COOL coolant into new DEX-COOL coolant. DEX-COOL coolant can be recycled into new conventional coolant. Consult local listings for coolant recycling facilities in your area.

05-25-2007, 07:28 PM
a pic

06-02-2007, 05:15 PM
Awsome thread guys. Everything on here helped me flush out the coolant on my stock Grand Am properly.

I'd just add that it's not a bad idea while you are doing this to remove the surge tank and flush it out [just unclamp the 3 hoses and unbolt it from the frame. The one hose with no clamp is just an overflow tube that doesn't connect anywhere, so don't worry about pulling that one off it's nozle]. I had some gunk buildup in mine after reaching the 5 year suggested change interval. I'm sure you don't want that floating around in your coolant system.

04-23-2008, 08:58 AM
the unclampled hose at the very top next to the cap is just hanging there at the bottom and all my coolant is spilling out from it and i have to keep putting more coolant and water in it because the coolant is going empty. am i wrong and it's supposed to happen or what. anyone answer back:attention