Number97 Posted February 16, 2009 Author Report Share Posted February 16, 2009 How are the SIR messages blocking the coolant temp? Hit reset/information and see if the SIR message goes away. I tried pressing reset information and it did not clear the SIR message. I am considering that there may be an electrical problem. I want to disable the system message completely, (at least temporarily). Pulling the fuse doesn't clear it either. The side tanks can leak under pressure you dont see the coolant leak it comes out under pressure and immediately vaporizes, you will see white deposits on the side tanks. I removed the radiator this weekend and had it serviced. There were no deposits around the seams of the plastic tanks. The radiator will be COOL if you have AIR in your system and the water pump is cavitating also because you are not circulating coolant I can understand that; I filled the system before starting and warming the engine; I'm sure there was sufficient coolant. TED is correct that if you have new coolant a combustion gas test may not be accurate at this point, let it overheat and then test it. I prefer not to continue to let it overheat if I can help it; clearing that message so I can tell if sensors and relays are working properly would really help me to tell what's going on. IF you have an active leak from the crossover seals because you damaged them doing the water pump and the system is not holding pressure you need to fix the seals. Get a cooling system pressure gage and test to see if the system will hold 16 PSI, and let it leak down and see what it holds or doesnt hold This is really the wierd part; the system has been pressure tested and tested okay at 25 psi, but it was tested while the engine was warm. The problem occurs as the engine cools. I guess the parts contract and it leaks, but not a lot, just a small puddle about the size of the bottom of a soda can, then it stops Also check the cap, made sure it holds the rated pressure and that it is the correct one. Cap is new, rated at 16 psi. Also are the cooling fans working. Start with the purge line, remove the bolt with a hole in it and inspect it for a clog I answered each of the suggestions you gave in the above block, as for the fans: The fans come on when I turn on the A/C, but without a temperature gauge, I can't tell if they are coming on at the right time while the A/C is off, but they do come on. SIR message is still making me blind. The purge line is still something I am not sure of; I will check in to that. Thanks for all the great input, it is appreciated! Link to comment Share on other sites More sharing options...
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