My 2007 GXP turned 5 late last November so the coolant needs changed. I've been waiting for better weather to do it myself. I've seen the thread on how to fill the system but nothing on how to drain it. Is there a petcock on the radiator, are there drain plugs in the block? Can anyone give me some help please?
__________________ Aggressive, 5-speed Manual.
Mods: Westers Race Tune, K&N Drop In Filter, Dejon SS BOV Spring, JPM Visor Covers, 3M Clear Bra, GM Splash Guards, Shorty Antenna, Silver Painted Calipers W/Red GXP Letters, Red Arrow Decals, JPM Stitched Console, Silver Painted Rotors, Mirror Polished Stainless Engine Cover, Fuse Box Cover and Visor Mirrors, DIY Tunnel Brace, Dual Horns, DDM Pro-Beam.
The drain release on the passenger side is real easy to get at. It is a white plastice valve. most fluid drain pans will slide right under the radiator.
__________________ Steve Sol
2008 Solstice GXP, Cool.
Hp Tune; GMPP Turbo Upgrade Kit, GM Perfomance Brake Reservior, ZOK Anti-Sway Bars; DDMWorks Backbone Brace, LV Front Brace and Pro-Beam; MagnaFlow Performmance Exhaust; Performance AutoWerks High Flow Catayltic Converter, Street Perfomance InterCooler, WR-1 Turbo Upgrade; DeJon Complete IC Piping Kit and Lower Intake Pipe; K & N Filter; Norm's Front Splitter; Spec Stage 2 Clutch, Extra Dark Tinted Windows. Lets not forget a heavy foot..........
If your temp is sporadic, you probably have an air pocket. There is very detailed info on that on here as it is not simple to fill the Sol and not allow air into system. It is also tedious to get air out. Something like driving one tire onto a 2x6 or something. If your temp is consistently higher, then the new coolant is not as good as previous coolant which would mean the mixture is different.
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Yes, that was my first thought and I did the bleed process documented on the forum. I got fluid coming out of the line that connects to the top front of the engine, when I squeeze the large hose, it will blast out into the reservoir tank. This process lowered the fluid level in the tank by 1/4" inch. So now instead of the temps fluctuating from 190 to 220, they just go from 195-207. I'll try the bleed process again and see if I get anymore air out of it.
I had to change my thermostat over the fall and took it to my buddy to flush the coolant right after. he used a vacuum system. it took maybe 30 minutes including prep and a trip around the block afterwards. the vast majority of the time we were drinking beers leaning on the side of the car. highly recommended
Last year I drained the radiator and refilled with fresh 50/50, required ~132 oz. to get it right.
Today, I drained both the radiator and the water pump and refilled with fresh 50/50, required ~190 oz. to get it right.
A lot of work getting the WP bolt out and it really makes a mess draining!!
My NEW Maintenance Schedule for the rest of the time I own the Coupe is going to be a drain and refill of the radiator each spring with a fresh gallon of 50/50.
That should keep enough fresh coolant in the system. YMMV
I guess I am OCD, or something close to that because this R&R of the Coolant thing has me questioning what is going on. The Repair Manual list the specification for the 2.0 @ 9.5 qts (304 oz.). But when I drained both the water pump and radiator, the total amount drained was ~190 oz. and I even included the amount that I recovered when I changed out the upper radiator hose to blue silicon. When I refilled, it was very close to the same amount (190 oz.). When I refilled, I used a HF pump to purge the air in the system and I also have the valves installed in the water lines per TSB.
Where is the rest of the coolant? Is it in the block, the heater or????
Another thought, if I could have used the Vacuum Procedure, would it have replaced all of the 304 oz. or just ~190 oz. that I was able to drain out?
Last year I changed out a gallon because it was easy and the Coupe was four years old.
This year the Coupe is a year older, birthday April 8th, and I wanted to R&R all of the Coolant.
Now looking at my results of draining both the radiator and the water pump showing only ~190 oz., my plan now is I am going to drain and refill the radiator each year with a gallon of fresh 50/50 Dexcool.
The wonder that I have is how much NEW coolant is actually installed into the system when the vacuum method is used?
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