hardnett2

Hey guys Is the dealer hosing me.. I was running hot near the red then used heat to cool the engine off.. So I get thermstat replaced then I get it back he says it was running ok in 30 min i'm running hot. Then I see radiator flud gushing out when parked take it right back then he says leak in radiator.. he replaces and said good to go and ran the engine. I get it back today and 15 minlater with ac going I starts to run hot near red.. i am at a loss what to do?

jimbosr1

it might have air in the system.i would bleed it an see what happens.

hardnett2

Thanks How do I bleed it?

Brewmyown

You dont mention that the radiator had a hole in it the first time you brought it in for the stat. My guess is that they replaced the stat and didnt bleed system properly and it might have blown the radiator (if that was even blown). Bleeding takes a little time but its not too difficult.
1. Fill the system then start the car and get it to normal operating temp with cap off.
2. Set the heat on high and hot and rev enging to 1500 - 2,000 rpm for a few minutes (maybe 3-5) You may see bubbles or "burping" coming out every now and them
3. Turn off the car, top off the radiator and fill the reservoir and let it fully cool. Make sure you have enough fluid in the reservoir because as the motor cools it draws the coolent in from the reservoir. You may have to repeat this but I have never failed with this method.

I havent had to do it yet on my LS so I'm not sure if there's a bleeder screw located somewhere. Maybe someone will chime in.

hardnett2

I will try that today. I think you are correct, because i am just guessing but, i never had a leak in the radiator and where it was leaking from was not underneath in the front. I think that the stat may be blown the leak was gushing out from quater way to just under mid way off to the passenger side. NOT close to radiator.

john339

I would park it with the radiator higher then the rest of the car so the air will come out easier and then follow Brewmyown's instructions. I park in our driveway which is sloped and burp the vehicles front end up.

Brewmyown

Thanks John I forgot to mention that. I usually will park it on an incline or take a floor jack and raise the front of the car slightly.

Hardnett, if this does work check your reservoir the next few days (before staring when fully cooled) and note the coolant level. Add if needed.

hardnett2

Great thanks guys i appreciate it.. So if it is not burped it will cause the engine to overheat? thanks again

john339

The air pocket can stop at the thermostat and then it won't know to open since no hot water hits the sensor of the thermostat.