Mr Slimm

Thanks BBF, that's what I was looking for. You understood what I was saying. The reason I asked is because, I read, you will not see leaks under HOT pressure leaks. So I was thinking, how would you know, if you dont see it? YOU SMELL IT. Also, that's why I asked what is the symptoms, because if you didnt see the coolant leaks, it should give other tell signs. Thanks again BBF. When the radiator shop do the pressure test, they will only be able to identify external leaks correct? If they do not identify any leaks, then is that a definite internal leak?

If you have a coolant leak that leaks under pressure, how is this identified, 1... 2, what is the symptoms of?

He did not get SMASHED by "us guys" because he mentioned you, he got smashed because he made a lot of false assumptions/conclusions, and USED you as support. As I said, the Northstar does not have an overheating 'issue' I have two questions. Is there anyone out there that have solved this problem? I see a lot of to-do's, which is great information, but where are the comments of people that have solved the overheating pain? Where are the testimonials of the people that fixed this issue and what they did to fix it? That's what Im waiting on to read. That way, a lot of money is not spent chasing the wrong issues. I have another question. What do you do next after you do a NAPA test and it doesn't show any signs of exhaust, whats the next step?

It make sense, you may not understand what I am saying but its really simple. I am having overheating issues, and all the post in cowgirls has not provided and answer. Here are the symptoms: After driving for about 30min, the temp needle goes up 1 notch past midway. This is mainly highway driving. After a while the needle goes back to midway. In the past I had the trickling sound behind the dash, and it progressively got worse. I had my A/C serviced, and all I had was my drier replaced and freon filled. The sound and the overheating went away. Now 3 months later, its coming back slowly. I have had the radiator replaced, the water pump is not leaking, the thermostat is good. Pressure test revealed the head gaskets are good. I'm looking for help. Mechanics do not have the answer either. Lets get something straight here, your explanation DOES NOT MAKE SENSE. I am not new at this, my chosen profession is analysis of detailed concepts and I wrote 100 page reports weekly for 15 years. Its REALLY SIMPLE because its in YOUR head, and you have not communicated it well. I am sure my fellow members will attest to that. Before this post of yours your posting was vague, you had the preconception that the Northstar overheats, and you had a chip on your shoulder or an attitude. You are coming here for help, when you come for help, try to be OPEN to our suggestions and recommendations, NON JUDGEMENTAL, and carry no attitude because you have CONCLUDED to NEGATIVE ideas about the NORTHSTAR. This is an enthusiasts site, we approach things from a POSITIVE perspective NOT a NEGATIVE one. I compare diagnostics to an INVERTED CONE, there are LOTS of potential causes at the beginning of an analysis but you ELIMINATE each cause ONE BY ONE through testing and verification until you are left with the CAUSE. BUT, you approach this board with a negative attitude or preconceptions and you will get less help. Negativity flows freely in the world today, try to be positive and communicate clearly and we can help. Your basic mechanic out there sucks because they are judgemental, have a negative bias, parts replace, and are driven by money. WE ARE NOT WE CAN HELP YOU. We have helped hundreds of owners with overheating problems. Thats not what I meant. I did not come here with a chip on my shoulder. I came for answers. Sorry if you took it that way, but that was not my intention. I apologize if it offended you in any way. If i came with an attitude, I wouldn't have added you as a friend. Again, I apologize for the miscommunication. Thank you for the info that you provided. I hope that I can tap into your expertise in solving my issue.

It make sense, you may not understand what I am saying but its really simple. I am having overheating issues, and all the post in cowgirls has not provided and answer. Here are the symptoms: After driving for about 30min, the temp needle goes up 1 notch past midway. This is mainly highway driving. After a while the needle goes back to midway. In the past I had the trickling sound behind the dash, and it progressively got worse. I had my A/C serviced, and all I had was my drier replaced and freon filled. The sound and the overheating went away. Now 3 months later, its coming back slowly. I have had the radiator replaced, the water pump is not leaking, the thermostat is good. Pressure test revealed the head gaskets are good. Im looking for help. Machanics do not have the answer either.

What flow does this involve? Does this hold pressure for the coolant? Also, what is the inter-workings of the coolant to the A/C? The reason I ask is because, I have and had the same issue with the over heating. I had my A/C serviced and recharged. I had my drier replaced. I was having heavy trickling sound behind the dash. It started light, then it progressively got worst. After I had my A/C serviced,it went away. It is starting to come back now, three months later. My temp gauge is rising after highway travel. After a while, the gauge will return to mid way on the gauge. This is what is so puzzling. If it is hot, it should stay hot, don't you think. That's what I think it has something to do with pressure release. That doesn't explain why it went away after servicing the A/C though. This has really been a headache. No on seems to know how to solve it either. That is also frustrating. Need help.

Does anyone have the answer to the northstar overheating issue? There has been many post about the issue, but no answer. If you do not know the history of this issue, please read cowgirls post about the slushy sound post. All attempts to solve the problem has been taken, but no cure. I cant believe that no answer has been given because many cars have been taken to so call qualified mechanics. There should be some type of tech memo concerning this issue available. This has to be a known problem with Northstar motors, because it has happened numerous times. I have read this happening during the periods on 98-2004 northstar motors. I have a question. They say that these motors have a pressure release valve that automatically releases pressure. Is this valve replaceable? I think that it is something intermittent. Because the temp needle only moves up at certain times. This has lead people to believe that it is a thermostat, water pump, head gasket, fan, etc... issue. It has been proven that these are not the culprits. They have been changed out and have not solved the problem. If anyone know that answer to this annoying issue, please pass it on. It would be very appreciated. Thank you for your time.