Question about 1999 Mazda MX-5 Miata

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1999 1.6 dx mazda protege overheating... recently changed thermostat , coolant temp sensor , radiator and did a flush there is no white smoke from the exhaust or any other indications of a blown head... also checked to see if water was leaking from the water pump... none. what is causing the coolant to bubble inside the reservoir and why would my mazda overheat?

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Posted on Jan 02, 2017

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SOURCE: Overheating '99 Mazda 626 LX 6-cyl

no that wont make it over heat
the thermostat will be blocked or malfunctioning

Posted on Jul 18, 2008

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SOURCE: 01 Intrepid 2.7 overheating

Although you have flushed the system what it sounds like is that it may have a blocked heater matrix, when you run it up can you feel the temperature of the pipes going into and coming out of bulkhead to matrix also check temperature of all pipes in engine bay as definitely sounds like a blockage somewhere same with main radiator does it feel the same temperature all over? If this throws no light then suggest to get a cylinder head gasket test kit which is widely available and all you do is insert it into coolant expansion tank and see if changes colour if exhaust gases are present.

Posted on Dec 11, 2008

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SOURCE: Blown main fuse on 2003 mazda protege 5.

There are two bolts on the side of the fuse itself. Under the fuse box on each side. Unbolt those and it will come out.

Posted on Dec 23, 2008

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SOURCE: Mazda MPV Coolant Loss (but no overheat)

i had the same thing on my wifes 2000 mpv van...the ends of the radiator are made of some sort of composite type had a slight crack in it....wasn't obvious until it got worse and started streaming water from it when warmed up....even after it cooled enough not to be spewing it was hard to actually see the crack though a few inches long....was hard to even see where the water and antifreeze mixture was coming from until i took out the radiator

Posted on Jan 13, 2009

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SOURCE: mazda 2003 protege overheating is this most likely

That's a good (and cheaper) place to start. You might also check belts (water pump at least) for cracking and glazing; the circulation rate doesn't have a lot of latitude and a slipping belt can have an influence.
Also, is your electric fan running when it should?
Also, once you are under the hood, check your oil for any signs of Jergens lotion (water/coolant contamination) and your overflow bottle for any signs of oil floating in it.  If you are going to get your hands dirty anyhow, you might pull your plugs and look for any suspicious rusty discoloration. This paragraph is assuming bad stuff; namely a failing head gasket which can also cause overheating if it has failed between a cylinder and the water jacket; during combustion, hot gases are pumped into the coolant which also should cause bubbles that you can see in the overflow bottle.  

Posted on Mar 30, 2009

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