Feb 20, 2015, 05:57 PM
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How to drain coolant on a C6?
Thread Starter
Racer
Joined: Sep 2005
Posts: 257
Likes: 116
From: Vancouver area, BC, Canada
How to drain coolant on a C6?
I do not have a shop manual for our 2006 Corvette.
Someone please show me where the drain points are for draining coolant.
I presume there is a stopcock at the bottom of the radiator somewhere like on most cars? Where exactly?
Are there any additional drain points?
Help? Need to do a flush today. Thanks.
Plan to just open up the drains, collect the old stuff, and then keep pouring in fresh water while the car is running hot till it runs clear, like I do on any other car.
Someone please show me where the drain points are for draining coolant.
I presume there is a stopcock at the bottom of the radiator somewhere like on most cars? Where exactly?
Are there any additional drain points?
Help? Need to do a flush today. Thanks.
Plan to just open up the drains, collect the old stuff, and then keep pouring in fresh water while the car is running hot till it runs clear, like I do on any other car.
Racer
Joined: Feb 2009
Posts: 425
Likes: 0
From: Diamondhead Mississippi
I do not have a shop manual for our 2006 Corvette.
Someone please show me where the drain points are for draining coolant.
I presume there is a stopcock at the bottom of the radiator somewhere like on most cars? Where exactly?
Are there any additional drain points?
Help? Need to do a flush today. Thanks.
Plan to just open up the drains, collect the old stuff, and then keep pouring in fresh water while the car is running hot till it runs clear, like I do on any other car.
Someone please show me where the drain points are for draining coolant.
I presume there is a stopcock at the bottom of the radiator somewhere like on most cars? Where exactly?
Are there any additional drain points?
Help? Need to do a flush today. Thanks.
Plan to just open up the drains, collect the old stuff, and then keep pouring in fresh water while the car is running hot till it runs clear, like I do on any other car.
Le Mans Master
Joined: Dec 2004
Posts: 5,493
Likes: 809
From: West coast CA
One is located directly above the starter and requires that the starter be removed to access. The other is a huge brass plug under the left header that requires a 17mm external hex socket.
Racer
Joined: Dec 2010
Posts: 418
Likes: 0
From: South Central Kansas
Sign up for Alldata at www.alldatadiy.com. This is an online shop manual that costs about $26 bucks a year and most everything is there. Coolant drain and replace info as well as coolant flush info is there and very detailed. I use this myself and have for several years on different vehicles.
Disclaimer: I am not affiliated with Alldata in any way.
Bob
Disclaimer: I am not affiliated with Alldata in any way.
Bob
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,404
From: Bethesda MD
Lying on the ground looking up you'll see a cutout in the plastic where it drains. Reach up a few inches and you feel the plastic valve handle.
I raise the car up enough to just get a milk cartoon to slide underneath and drain into that. While some drips from the valve, overall there was very little mess.
I raise the car up enough to just get a milk cartoon to slide underneath and drain into that. While some drips from the valve, overall there was very little mess.
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Race Director
Joined: Jul 2005
Posts: 12,058
Likes: 3,590
From: Central MO
You do it like the OP posted. Drain the radiator, fill it up with clear water, start the car, let it run while draining out the radiator; drain until nothing but clear is running. Obviously you keep adding water at the same rate it's draining out the bottom. Let the clear water drain out of the radiator, close the drain, and fill with straight coolant. In my experience, most cars hold about 50% capacity in the block and 50% in the radiator so you end up pretty close to a 50/50 mix this way.
Race Director
Joined: Jan 2004
Posts: 18,727
Likes: 711
From: Bergen County, NJ
You do it like the OP posted. Drain the radiator, fill it up with clear water, start the car, let it run while draining out the radiator; drain until nothing but clear is running. Obviously you keep adding water at the same rate it's draining out the bottom. Let the clear water drain out of the radiator, close the drain, and fill with straight coolant. In my experience, most cars hold about 50% capacity in the block and 50% in the radiator so you end up pretty close to a 50/50 mix this way.
I did mine this way, but I used distilled water. I think the outcome would be a 60 coolant/40 water mix if done this way, which is good.
Burning Brakes
Joined: Jun 2007
Posts: 878
Likes: 145
From: Little Egypt, USA
Short of removing the block drains you are not really getting out all of the old coolant. A dealer style flush machine works well or you can install a flush tee in the heater inlet hose and use a garden hose to flush the entire system. Pour in the 6 liters of antifreeze first with the tee open then add the water. Close the tee. Since the air is pushed out the tee when filling air problems are reduced.
