Radiator problems

Radiator: Finned aluminium panel placed in the frontal part, inside of the engine bay.
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How tight must be radiator tank

Mazda Mazda3 2015 Hachback 750000 miles
How tight should I close water tank
John from other 2 years ago  
JO

Leaking antifreeze

Mazda Mazda3 2010 Hatchback 220008 miles
I changed the thermostat but my car still requires me to put water in it due to leaking it out
Desreyna from United States 2 years ago  
DE
1 reply 
Jamie from other 2 years ago
I'm noticing a similar issue with my 2012 sedan, the coolant system has no leaks but it seems to always want to stay at the low level line on the reservoir. When I top it off to the upper fill line, it consumes it back down to the low level. But I've never seen it go below the lower level.
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Overheating

Mazda Mazda3 2010 mazda 201000 miles
Replaced radiator and fan,radiator fan temp relay
scott from United States 3 months ago  
SC

1. Dpf always on. 2. Overheating

Mazda Mazda3 2014 Hatchback  130210000 miles
1. Dpf always on. 2. Overheats when driving more than 120km an hour. 3. Water not going back to the radiator, changed radiator caps.
Roberta from other a year ago  
RO
3 reports 

Ecu not communicating

Mazda Mazda3 2012 Mazda 3 40000 miles
ECU not communicating and radiator cooling fan won't shut off even when cold
Guyp from United States 2 years ago  
GU
7 reports 
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