its clear as i can blow threw it..

 

I had both done.Anyway, i drained and water flushed out the cooling system. Its pretty clean as i did a more entensive one 10,000 miles ago and i keep after it. I tried a new product this morning as it is the weekend and i cant get anything shipped today. I chose the new Bars headgasket fix . You can add to antifreeze and dont really have to go therw alot of steps so for $30.00, what do i have to lose. I was going to order irontite but have to wait to get it. There was 2 others i was looking at but for todays treatment after reading some reviews, i bit the bullet. As you know i had a bubble in the expansion tank so time was going to be a issue to get this product to where it was needed without having to fight off the pressure. I filled the raditor with the product and then anti freeze mix 50/50. I then filled the expansion tank to the filler neck as when you start it will drop to the fill line. I cranked it over and waited for 15 minutes as that was what they reccomend. At just about 15 minutes it was moving to the 1:00 mark and the hose was a little tight. i shut off and waited about 5 minutes and slowley released the presure out of the expansion tank just enough to let the air and no coolent. When i had the pressure out I restarted and took off the bleeder line at the raditor so it could idel and not build so much pressure"the problem" aand it stayed at 12:00 for another 15 minutes. I then got in and drove it at about 45 miles and hour for about 45 minutes around where I live in case of disaster. It stayed at 12:00 and actually 11:55 as I have my thermostat modified to stay open. I live in florida and it was 95 degrees again today and i wanted to make sure to get the product circulating without anything that could cause undo heat and pressure. I got back and the hose was not tight as before and more importantly, overheating. I am letting it sit to cool like is says in the directions and will take it out later for 30 minutes or so. Tomorrow i will take it on the freeway and around town for a hour or more to simulate my daily driving day which is about 60 miles or so and stop and go traffic in 95 degree heat. I will post tomorrow on the results. Thanks for chiming in...Oh yea, I will change out the thermostat next week when I am sure the problem is fixed.

 

Update; Drove this morning for about an hour. Covered about 50 miles. round town,traffic, expressway and the freeway. Temp sat at 12:00 and on the freeway a hair below 12:00 about 11:55. No misfires, rough idle or anything in paticular.No leaks or super hard hoses. Collent at level mark. So far i am pretty impressed. I did notice one thing when i shut of though. I am not sure but the fan spun for a couple of secounds after I shut the engine off. I did check when cold and when you try to spin it really wont spin but 3 or 4 inches so it has resistance. i would think it should stop almost as fast as everything else when you shut off. maybe someone can enlighten me... If that is a sign of going, i will change it when i install new thermostat. i will also be replacing all hoses and vacume hoses next weekend. It's on the list. Well, I will keep updating ..

 

Hi!
I would say is the viscous fan unit!!
Mine did the same.......and it kept overheating....nearly to red......I got the fan and bolted it to see what happened....and the temp doesnt go up...always on 12 oclock.....If ordered a new one to island4x4.......
Mine is a diesel one.....but the principles a the same....."a car should never go further than 12 oclock if the water sistem is ok (unless over heavy work ore hi ambient temperatures......)...if it goes up is because something is not going well!!!
New water pump...Thermostat works (I would get a new one in the doubt......not only heat it to see if it opens)....¿The radiator? Flush it se if its ok (I got a new one because mine was loosing coolant to the gearbox), I was abble to stop the fan by hand when car turned on...that shouldnt be like that....and when it gets hot you are abble to hear very clearly....its very noisy when he´s engaged....
Hope this help!
Adal Trujillo.Canary islands.spain