Question about 2004 Mazda RX-8

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2005 RX8 TYPE S (31,000km) coolant constantly boiling out of reserve tank after car driven but temperature gauge shows normal temp reading.CEL on and coolant light(even when tank filled).Loud clicking sound when a/c unit on...fan chips in and out with the clicking sound.Slight misfiring also.

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6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: My cooling fan starts after the coolant is boiling

replacd your thermostat and guage...

Posted on Mar 05, 2012

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emissionwiz
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SOURCE: when car is being driven,

The cooling fan will stay on if the sender has an open, or the wiring to the sender is open, or the control module has a fault, this is known as fail safe so you don't fry the engine, make sense? you need to run a self test for fault codes, Kragen will do this free.

Posted on Sep 02, 2008

  • 4088 Answers

SOURCE: I have a 1996 Mazda 626, the check engine light

The cooling fan must run or the car must be running into the wind to keep from cooking the engine. Physically turn the fan to see if it turns freely (cold engine). The computer reads coolant temperature and trips the fan relay on when normal temperature is reached. You need to read the control voltage at the relay to determine the problem. Possible bad temp sensor.

Posted on Jul 15, 2009

  • 34 Answers

SOURCE: temperature gauge warning light

just below the filler cap there is a plastic type nut with a wire on it, the temp sender, change it as these tend to go wonky

Posted on Aug 22, 2009

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2 Answers

I drive a Camry V6 3.0L Every time I top up the coolant to the recommended level and after driving the contents in the reservoir boil over and spill out.


There may be a slight head gasket leak to the coolant jacket, not large enough to overheat the engine. It is normal for some coolant to escape at operating temp, but not lots, and it should cool down to about the recommended level again.

Something is pressurising the coolant jacket. Have it tested for the presence of combustion gasses in the coolant. This is a simple test.

Another thing, that model often develops a crack in the radiator plastic top tank. It is not the problem here, but worth knowing.

https://www.youtube.com/watch?v=a3J00_e7fyo

Oct 29, 2016 | Cars & Trucks

4 Answers

What is causing antifreeze to come out overflow tank?


Could be a defective radiator cap, or a leaking head gasket.

Oct 28, 2014 | 1999 GMC Suburban

1 Answer

Temperature normal but radiator bottle boiling in my golf 4


If your radiator coolant is boiling then do not drive as your car could/will overheat and cause some serious damage

The temperature gauge in the Mk4 Golf is'nt that accurate, it will usually stay in the middle until you've got a major problem, where the coolant is boiling and expanding so if it's just slightly overheating, the gauge could show as normal.

The problem could be caused by numerous things such as a leak/crack in the coolant system and isn't pressurized such as a faulty coolant bottle cap not sealing properly, could be a problem with the fans, or and issue with the temp sensor /thermostat can cause confusion. It's hard to diagnose without seeing. I would take it into a garage for further inspection.

Feb 08, 2014 | Cars & Trucks

2 Answers

Overheating coolant boiling out into reserve tank


you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

Jul 14, 2012 | 1998 Plymouth Breeze

1 Answer

Engine temperature coolant sensor


Your description indicates the engine/coolant thermostat is faulty and allowing at least some coolant to continue circulating so at higher road speeds the engine is over cooled.

Apr 03, 2017 | 2003 Jaguar S-Type

2 Answers

Orginally, the temp gauge reads normal, drives fine, shut car sown and the reserve tank is boiling, changed the thermostat last night, let the car heat up drove it 2 blocks away, temp gauge shot up to hot...


2 blocks is fast to reach boiling.Take the cap off the overflow tank and fill it right to the very top with coolant.Start the car and watch for a steady stream of bubbles.If you see a steady stream you do need a head gasket or have a crack somewhere in a combustion camber.

Jul 03, 2017 | 2001 Chrysler 300M

2 Answers

I have a 99 Mercury Sable Wagon that keeps boiling the radiator fluid out of the reserve tank. The temp gauge isn't reading hot, though. Any suggestions? Thanks.


Sounds to me like a blown head gasket. Even if your vehicle is not warmed up, if your reserve tank is boiling fluid out of it when the engine is cool, it's most likely losing compression from it all going to your reserve tank. And thats why it's fluids coming out of your reserve tank. BUT, if your radiator is clogged then the same thing could happen. So i would start out cheap before you have to replace a HG. Thanks, James Booth been a mechanic for 6 years

May 17, 2011 | 1999 Ford Taurus

1 Answer

My 2005 Venture is having an overheating problem. First we had the thermostat replaced, then the fluids flushed, the o-ring replaced and then all of the fluids replaced again. It's still doing it. It's...


is your coolant reserve bubbling or boiling
i ask because you already changed the thermostat
and if you saw bubbles it maybe a blown head gasket
it will cause overheating
hope this helped
give feedback

Jan 24, 2011 | 2005 Chevrolet Venture

1 Answer

Bubbling water in the water tank


typically that is caused from a bad head gasket, fluid from the engine will be forces through the radiator then boils over or bubbles. As far at the no gauge reading, you probably need a new one.

Jan 03, 2010 | 1992 Daihatsu Charade

2 Answers

HI, MY CAR READS "CHECK GAUGE" AND THE TEMPERATURE SIGNAL GOES TO H WHEN I STOP AND WHEN I START DRIVEN GO BACK TO THE NORMAL POSITION { MIDDLE}. I DONT SEE NOTHING WRONG I OPENED THE HOOD AND I LEAVE MY...


Make sure that the coolant fan turns on. It should be automatic When the car gets to operating temp the coolant starts to ciculate and the fan comes on. If it doesn't driving pushes air through the radiator and can lower the temp.

Sep 16, 2009 | 1996 Ford Thunderbird LX

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