Question about Cars & Trucks
Coolant leaks on radiator cap
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Posted on Jan 02, 2017
You may need to ask AAA to put a radiator pressure tester on the resevoir bottle and pump it up to operating pressure(Pressure cap rating) and see if it over pressurises while it is running at operating temp,rev engine up and down and watch what the testers pressure readings do,it should move up and down in sync with the water pump.If the pressure keeps building i would have to believe that combustion chamber gases are over pressurising your cooling system.Also test the pressure cap is functioning within factory specs.
Posted on Oct 30, 2008
Hello Ranger Joe, eight months and two radiators is very uncommon. Question, Have you visually confirmed the leak in the radiators or is the leak near the hose connections? Replacing the radiator, cap, water pump, & the thermostat leaves only two others, the hoses and the engine block/heads. Far fitched will be something or somebody poking holes in the radiator.
Posted on Nov 07, 2008
in this case i would suspect the water pump,it would not really show up in a pressure test ,put a paper liner under the car at night and see if any water shows up on it in the morning,if it is ok, then the water could be lnternal ie the engine is taking the water,but 2007 engine should not have this problem unless it has a very high milage.one more [simple] answer is the coolant leaking from a simple loose conaction and drying up before you see it ,but water leaves a trace so have a good look about the engine for that water mark,please rate this answer.adrian,,,,,,,,,,,
Posted on Aug 22, 2010
Do you know how the head gasket was tested? I prefer the combustion leak detector.This is placed over the fill reservoir and connected to a vacuum source.The cylinder is then filled with a chemical that changes from blue to yellow when combustion gases hit it Additionally a very good way to check for a coolant leak is a UV light.Antifreeze is very flourecent with one of these.
Posted on Aug 22, 2010
Hi, its not good news im afraid by you describing that with the coolant cap off and revving the car causes the pressure to build up and push the water back out it sounds to me like the head gasket is on its way out, what you need to do is take it to a garage and dont have a compression test done you need to have a gasses test done, you can buy these yourself if you want to and what it does is this.
its a plastic tube with blue liquid inside it then you take the coolant cap off and place this in its place you then run the engine and rev it up then you squeeze the rubber at the end of the tube and it then sucks the air out of the coolant and through this liquid then if it detects gasses from the engine in the coolant then this turns the liquid green and this is then telling you that the head gasket needs changing.
please dont let it keep over heating as this will cause the cylinder head to warp and you would then need to get it skimmed to make sure its not warped, get the gasses test done as a compression test dont give you a true reading as the engine is not running when they do a compression test.
let me know how you get on or if you need further assistance ok
plz rate this solution as i have a whole page of unrated posts, thanks
Posted on Sep 21, 2010
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