Thread: Heat issue grandprix 2008 3.8

The temp gauge should stay right in this area, or maybe 1 or two notches lower. That's the 195-200°/F area. I understand you're in Canada so yours may be in °C. I think the area is the same temp range though.

Well did you flush the heater hose with full garden hose pressure? Back and forth? If so that's all it needs. Is the cooling system clean? no brown gunk? If the engine is up to temp and both hoses are too hot to touch and still not good enough heat, a blend door may not be working right.

Sorry I was trying to find it for you but chilton isnt working. Someone else will have to chip in for that, its different for the previous generation of GP.

http://www.grandprixforums.net/showt...door+actuators heres the blend door how too.

if you flushed the core, then blew air through it. but did you refill the core and hoses with water? if you put the hoses back on with no coolant in the core its air bound again. re flush it, but leave it full to the ends of the hoses, and put them back on the alt bracket.

Originally Posted by ibra0078

When i flushed then blow the water out I just out the hose back on, your saying to fill the hose with coolant and then attache it back?

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big time!.

flush the core again you'll be fine, im sure of it. this time leave the hose water in the core and hoses.

the heater core is located low inside the car. so for the engine to pump it full and back up and out dont always happen.

take the hoses off the alt bracket, you dont even need to flush it, just fill it up, garden hose to one hose till water pours out the other hose, put them back on.

once you run the car the water will mix with the coolant. if the rad is low, top it off with some new antifreeze.

if you think you need more coolant, dump the rad out and then put new antifreeze in. or suck it out 1/2 way and top it off with coolant.

they do sell testers to tell you how cold your current coolant is good for. 50/50 mix is generally good for -20

yes. but open the radiator cap, top it off from there. if the coolant reservoir is low top it off as well.


this is the tester. you open the rad cap stick the hose in the coolant, pump the ball on the top it sucks coolant up into the tube, those balls will float and where they float tell you how cold your coolant is good for.

let the water mix in, then go test it. how cold should it be good for? well that depends an where you live, you know how cold it can get where you live. if you need it to be safer ant colder temps, drain the rad some, add new full strength coolant, not the 50/50 pre mix crap.

im safe at the -20. it dont really get close to that to often here. its just hit deg degrees this week for the first time this year, but only like -1.

if you want to flush it and start over all new.


how to flush the coolant.


remove the t stat, put the t stat housing back on, take the upper hose off the radiator, then push it down to the ground to a bucket or let it fly.


get your garden hose out, put it in the rad turn it on, then fire up the car, let it run till clear water pumps out the top hose.


then turn the hose off, run the car till no more water comes out the upper hose. then turn it off.


put your t stat back in, with new gasket, the upper hose back on.


now take 1 gallon of full strength green antifreeze, not the 50/50 crap. ( parts store cheap green is fine to use) dump the whole gallon in the radiator, fire up the car, fill the rad with hose water till its full. top as needed till its ready to be bled of air. it will burp and take coolant as the water in the block warms up the t stat opens up for a few seconds till cold coolant hits it and it shuts again.


now to bleed the air out, let it idle rad cap off till the fans turn on, (when the fans are on the temp is over 195 deg, the t stat is wide open) then open the bleeder screw on top the t stat housing a few turns till a steady stream of coolant comes out the hole, shut the screw, top off the rad. cap it.


done.


the one gallon of coolant is safe for that -20. if it gets colder by you add more full strength coolant to the mix. the antifreeze jug has a chart on the back of how much to mix to get to your safe zone.

your engine and cooling system only holds about 3 gallons of coolant.

the coolant you want depends on the color of your current coolant. if its brown or orange, its dex coolant, use only dex then or one that mixes with other coolants.

if its green add any green coolant of your choice. if you flush it one day, change it to green, its easier to find and cheaper. i use store brand cheap ass coolant, it works just fine at 12 bucks a gallon.

yup thats the stuff. note the price too.

green is much cheaper. most of us here have switched over to green.