Question about Mazda RX-8
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Posted on Jan 02, 2017
SOURCE: car overheating
you have to change your Heater Core. Your Antifreeze moves in a circular motion from Radiator to Thermostat through engine to your heater core back to your radiator. If there is no circulation, your engine is going to overheat. I had the same problem with my Pontiac Grand Prix.
Posted on Nov 23, 2008
hi jasso, I would recommend checking the water pump if you see no flow in the radiator. Make sure when you fill up the cooling system, that you fill it cold, and that the vent screw in the radiator is loose. fill system until fluid comes out the vent screw. tighten the screw, start the car and have someone run at 1500rpm and check for flow.also, make sure that you have your temp setting full hot and blower on middle speed so that you don't trap air in the heater core.
Posted on Apr 05, 2009
To start with you have to do this:
With the engine cold, start the car and say after 30 to 40 secs. open the radiator cap.
Carefully and slowly, cause if the problem is either in the cylinder block or cylinder head this shows immediately as water would be compressed in the radiator ( even though the motor is still cold ).
If nothing happens and you would not notice any bubbles in the radiator, then we have to talk again.
Joe ( Malta )
Posted on Jul 10, 2009
Still sounds like a bad radiator...new or from scrapyard? If you can't add coolant faster than a really slow dribble that's a big clue.
You can run the engine with the heater on high and the engine should not air-lock. I'd also remove the thermostat just to make sure it is not defective. Run the engine without it and see if it still overheats. Last, it is possible that your head gasket has failed, and engine compression is causing the overheat. I tend to think not only because the hose stays soft.
While it's running, also make sure that the lower hose is not "sucking in" if it is, replace it. On 4.0 engines you can also get the serpentine belt on wrong and it will drive the pump backwards. if you replaced the belt check that too.
Posted on Sep 28, 2009
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at the bottom of the radator at one of the corners useally the left side there is what is called a petcock, turn that counter clock wise and the radator will start to drain, open the radator cap and it will go alot faster.
Posted on Nov 23, 2009
Tips for a great answer:
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are many possibilities for car overheating.
thermostat clogged radiator/plugged radiator, radiator hose worn out. Coolant
running low. Low coolant pressure. Faulty temperate sensor.
suggest you to go through the troubleshooting details mentioned in the link
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