Radiator flush and Coolant selection
Myrtle Beach
06-29-2004, 02:47 PM
I have a 99 GC and cannot figure out how to drain the coolant. The manual says to open the drain on the radiator (which I did but nothing comes out) and open the engine block drain plugs (which I can't locate). Do you have to open these engine drain plugs to flush the system and if so where are they? Please help, My coolant is in pretty bad shape. Also, Is Dex-cool compatible (the red stuff) with these systems or do I have to stick with the green stuff?
Any info on draining and flushing the cooling system is greatly appreciated!
Any info on draining and flushing the cooling system is greatly appreciated!
JDPascal
06-29-2004, 03:30 PM
Dang I hate that server to busy – had a reply and lost it
Here we go again
There are flushing kits available where you istall a “T” in the heater hose, attach a garden hose and push out the old antifreeze.
Not to environmentally friendly but I have improved on it by draining as much as I can and catching the rest in a 25 gallon garbage can as it comes out the top of the rad. That way I can choose where it is disposed at.
Your rad drain is probably plugged with sediment. Remove the fitting completely and poke a wire or small screwdriver in the hole to break it up. You’ll get a gusher for sure..
The block drains on the V8’s are in the middle on each side under the exhaust manifolds.
They could be plugged up as well. Mostly I just drain at the radiator.
You could also pull the bottom rad hose off tool.
I would stay away from Dex Cool. It’s been bad news for many owners. Just do a search for it’s name on the internet.
Regular antifreeze is the best with a 50/50 mix.
Good on ya for changing the antifreeze. It is a often neglected service that will pay off in the future
JD
Here we go again
There are flushing kits available where you istall a “T” in the heater hose, attach a garden hose and push out the old antifreeze.
Not to environmentally friendly but I have improved on it by draining as much as I can and catching the rest in a 25 gallon garbage can as it comes out the top of the rad. That way I can choose where it is disposed at.
Your rad drain is probably plugged with sediment. Remove the fitting completely and poke a wire or small screwdriver in the hole to break it up. You’ll get a gusher for sure..
The block drains on the V8’s are in the middle on each side under the exhaust manifolds.
They could be plugged up as well. Mostly I just drain at the radiator.
You could also pull the bottom rad hose off tool.
I would stay away from Dex Cool. It’s been bad news for many owners. Just do a search for it’s name on the internet.
Regular antifreeze is the best with a 50/50 mix.
Good on ya for changing the antifreeze. It is a often neglected service that will pay off in the future
JD
Myrtle Beach
06-30-2004, 08:56 AM
Thanks JD- I had no idea how many problems Dex-cool had caused. Sounds like sticking with the green stuff is the way to go. Thanks again, it sounds like you saved me a lot of headaches and money!!
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