Question about Mazda Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: 1998 aurora
I have had this problem with my 98 aurora and have replaced all the same components. Temp gauge routinely shows 200 on highway (Fine) but in the city in stop and go will get to around 245. I installed a switch to manually turn on the cooling fans by connecting the ground to pin 86 in the relay for the fan(s). Otherwise the fans will not turn on to 245. This fix works but would like to know an actual solution.
Posted on Jul 12, 2008
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
This sounds like the problem could become very serious and engine damage may eventually occur . I am not a mechanic but had similar problems with my Fiat Uno a few days ago (eventually the head gasket blew) and the same scenario with the Nissan Sentra. First check the following: Does the temperature rise more than the normal mark under normal operating conditions? Is the radiator cap in order? When checking the oil dipstick is there any signs of water and oil mixing together? Lastly is there excessive steam coming from the exhaust system? If so, you could be looking at a failed head gasket. Hopefully this is not the case and there is only an airlock in the cooling system thus being solved by checking and fulling and topping up the radiator itself (if possible) with a mixture of water & antifreese whilst the vehicle is idling - and not like i did on the Sentra - by constantly filling up the coolant reservoir and the water "blows" past the cap ......hope this helps.
Posted on Jun 25, 2009
well if the rad cap is damaged in any way the pressure in the rad drops its like a pressure cooker, if you open it fast it boils up on you,,,big time! so there may just be a small leak there,,its well worth having a good look at this part first pluss any other pipes and joints if all is good it could be the head gasket starting to go this can be tested for with a sniffer test
to find out if there are any hydrocarbons in the water in the rad,, its an easy test,, if there are any the head gasket is going or gone,
Posted on Mar 03, 2010
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