You may have a blown engine head gasket. Check your oil to see if it is milky because water is getting into the oil, and check the water to see if oil is getting into the coolant.
If you have either of these, you may need to have a new head gasket for the engine, and hopefully you do not have a cracked engine head.
This will require a fair bit of work to fix correctly. Your local garage or mechanic may be your next call.
There are some products you can use in the coolant for either of these, but it is only a temporary fix.
SOURCE: Overheating '99 Mazda 626 LX 6-cyl
This happened twice to me.Just replace coolant overflow container,buy new one not used .Always keep an eye on container , will happen again.
SOURCE: mazda mpv overheating when driving
possible head gasket do a preasure test on the coolant system to see if it loses any coolant or presure drops and check for leaks hope this helps
SOURCE: engine overheating
The coolant flush on radiator doesn't do any good. Since you have changed all the key components and still gotten overheated, then the root cause of the problem is the radiator. It got clogged up in small tubes blocking coolant flow. No matter how good the water pump is working but the radiator got clogged up, coolant is not circulating therefore the heat from the engine can't be dissipated to the radiator. Replace your radiator, don't even think about rebuild it. It has been used for 11 years. Make sure to have the correct coolant/water ratio to keep radiator life for years. Good luck.
Testimonial: "Thanks, it was the radiator afterall. They claim hose was attached too tight; caused it to chip. I think I was taken for a ride by AAMCO & Valvoline."
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