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radiator


blackjack21's Avatar
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10-07-02, 08:12 PM   #1  
blackjack21
radiator

HOW DO I DRAIN THE RADIATOR ON MY 2000 GRAND PRIX?I WANTED TO PUT NEW ANTI-FREEZE IN IT;BUT I CAN"T FIND WHERE TO DRAIN THE OLD OUT.THE OWNERS BOOK SAID THE ANTI-FREEZE LAST FOR 5 YEARS.IS THIS TRUE?

 
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10-08-02, 03:34 AM   #2  
Joe_F
Kill the caps, no need to shout.

Most vehicles of this era use extended life coolant, but I don't buy that.

Find the drain **** and that's where the fluid is drained. The dealer's parts department should be able to point it out to you on the parts microfiche and then you'll know what you are up against.

Basically, run a hose through the radiator and run the vehicle until what comes out of the petcock is clear. Then, fill the system to proper mix/fill. The owner's manual will state what that is.

 
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10-08-02, 04:29 PM   #3  
You may flush it if you like, but Dexcool coolant will last a long time provided only long life coolant is added and only distilled water.Which by the way only distilled water should be added to any engine coolant.The petcock is usually located on the side of the radiator other than the lower hose connection.If you have an extended warranty through GM it may void the cooling system warranty if you replace the coolant with regular coolant.

 
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10-08-02, 05:21 PM   #4  
Joe_F
Lol. I should clarify.

I don't buy that extended life coolant is really "extended". I would use it in a vehicle that has it as original equipment, but would drain it at the normal intervals anyhow.

The ingredients of some of these extended life coolants tend to clog up the works after a while

 
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10-08-02, 07:08 PM   #5  
Joe did not mean to question your maintenance practices,merely stating that all coolants react unfavorably with tap water,it's loaded with minerals and chemicals.Iv'e seen dexcool systems with 100k miles(that haven't been tainted by tap water and green coolant)clear as a bell.In fact radiator replacement is at an all time low,same rads different coolant.Granted the 4.3 is an exception so maybe it was the factory added sealant in those engines.Every car gets factory stop leak.Maybe the 4.3 was a guinea pig?It's not just GM either they all add stop leak of some kind.

 
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10-08-02, 07:41 PM   #6  
Joe_F
Not at all Davo. Wanted to just clarify what I said

 
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