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Losing Coolant and Sometimes Heat 2004 Pontiac Grand Am

After checking online, I noticed there seems to be a history of head gaskets going bad on these cars and I checked the oil to make sure it was clean. It was fine and I do not have white smoke coming out of the exhaust and it does not smell odd. So, I am thinking it is not the HG. About a month ago, I have had to add coolant every couple of days. This is getting expensive. Next issue was the dashboard light started going dim, the blower would slow down and there was a squeaking sound from I am assuming a belt. After a couple of secs, the lights would get brighter, the blower would blow strong again and the squeak would vanish. I have a feeling the coolant was leaking down onto the alternator belt to make the system slow down. Also, the ABS light would come on intermittently. One day, I looked at the engine as it was smoking. Turns out it was not smoking, but the whole left side of the compartment was covered in coolant and burning off the surface of the hot engine. A friend recommended we changed the hoses coming off the reservoir. We changed the hoses and after a few days, the coolant seemed to stop leaking and squeak, the lights and the ABS light stopped being issues. Now, over the last few days, there is coolant all over the compartment again, the coolant keeps going down and I am getting sporadic heat again. I do not know if this is a clue, but I tried to open the reservoir today and expected the pressure to come out, but there was not hissing or pressure and the cap just opened like a gallon of milk. I am now at work, was sitting in the parking lot for 5 mins and there is now a puddle of coolant on the ground, the ABS lights on, the compartment has coolant all over it, the squeak is there and I have no heat unless I accelerate or drive. I am also not seeing any source for the leak anywhere. As for where the puddle is coming from, it seems to just be leaking from the compartment bottom and dripping off the car. No obvious sign of a leak anywhere. I am at my wits end. Anyone have any ideas what is causing this all.

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Posted on Jan 02, 2017

  • 341 Answers

SOURCE: White smoke coming out of exhaust even when engine is warmed up.

on the 3.8 ussaualy not the head gasket but the upper intake gasket . antifreeze leaks inside intake and into the cylinder. very common. the new gaskets are much thicker.or the plastic plenum the black plastic part on top of the engine goes bad around the water inlet and need to be replaced . when i do either job itell the person to replace both at same time saves money and headaches in the near future. hopes this helps .....and cost for a shop to do this $1100 to $1500

Posted on Dec 08, 2008

  • 2 Answers

SOURCE: Car overheating

If u dont have a leak, then the coolant aint the problem, my guess is its the thermostat, this is how it works, you turn the car on, the thermostat is closed, re-circulating the coolant in the engine block until the engine hits "normal" operating tempurate. When it reaches normal operating tempurate the thermostat opens allowing the hot coolant to cool down some what through the radiator, and continues to circulate, my guess is the thermostat is stuck closed, not allowing the hot coolant to escape thus keep on heating up til u smell it. The problem is i dont have a pontiac to tell you where the thermostat is located specifically, u can buy yourself a haynes manual for $20 or so to help u in future cases which is how i learnt most the stuff i know. All i know is if u follow the upper radiator hose away from the radiaotr to the engine block you should come across a bleed screw, its beyond that and the thermostat housing is attached to the engine block, in my impala you have to take apart the air duct and cleaner housing to even get close to it. It may be easier in the pontiac i dont know, u can buy a thermostat from an auto parts store, some some with a seal built in some dont, if they dont youll need a new seal too, shouldnt cost u more than about $15-20 to D.I.Y. Wish i could help you further. Good Luck

Posted on Oct 07, 2008

  • 81 Answers

SOURCE: My 2005 Pontiac Grand Prix is overheating and

You should look under the car after it sits a while and see if there is antifreeze on the ground. If so try to see where it could be leaking under the hood directly over the puddle. You could have a leaking water pump. If so there would be dampness under the right side of engine compartment. Also check the radiator hoses at front of car.

Posted on Aug 10, 2011

perkins48
  • 14333 Answers

SOURCE: Problem with 2004 Pontiac Grand Prix 2004 pontiac gp, new heads, gaskets, coolant, oil, thermostat. still spikes heat. what next?

Replace your coolant temperature switch,it's screwed into block by oil filter.Here's a picture of what it look's like.Your water pump working properly.Are your spark plugs burning clean,not oily from bad piston rings?

Posted on Jan 16, 2013

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I have a 2000 grand am and the first issue is my heat blowing cool i added antifreeze that seemed to solve that problem but i seem to be adding it quite frequently before i did notice liquid which i...


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