radiator reservoir boiling

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ifaiZing

Member

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2003 Mazdaspeed Protege

• Jul 6, 2014

• #1

anyone have clues for a situation that a coolant reservoir is boiling but the temp gauge is at normal temp? My engine bay will be really hot, but there are no signs of smoke. All the pipes will be hot/warm but everything reads normal.

 

H

hornsfan10609

Certified Mazda Tech

:

2003.5 Mazdaspeed Protege x2

• Jul 8, 2014

• #2

It is a leak somewhere in the cooling system, quite possibly the radiator itself. My car did this and I finally found a pinhole in my new aluminum rad.

 

D

dirtysouth_msp

Member

:

2003.5 Blazing Yellow MSP (Forged)

• Jul 11, 2014

• #3

Check your radiator cap also. The bottom part breaks off and it will cause the reservoir to overflow.

 

T

turbomsp2003

Member

:

mazdaspeed protege 03

• Jul 13, 2014

• #4

Bump...did you ever find the cause mine is doing the exact same thing

 

I

ifaiZing

Member

:

2003 Mazdaspeed Protege

• Jul 17, 2014

• #5

turbomsp2003 said:

Bump...did you ever find the cause mine is doing the exact same thing

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I have not found the cause just yet. I've been so busy with work. I was pushing my car and testing how good it really ran with all the mods and after I came home that night, I heard all these boiling sounds and sure enough my coolant reservoir was boiling. I will have to check the entire radiator including the cap itself to see if thats the issue. the car runs fine and everything reads normal, but I can still feel the heat from the engine bay when standing beside my car.

 

I

ifaiZing

Member

:

2003 Mazdaspeed Protege

• Jul 17, 2014

• #6

hornsfan10609 said:

It is a leak somewhere in the cooling system, quite possibly the radiator itself. My car did this and I finally found a pinhole in my new aluminum rad.

Click to expand...

thanks, I will do a full inspection.

 

I

ifaiZing

Member

:

2003 Mazdaspeed Protege

• Jul 17, 2014

• #7

dirtysouth_msp said:

Check your radiator cap also. The bottom part breaks off and it will cause the reservoir to overflow.

Click to expand...

thanks. I will look into it. It might just be the radiator cap. I hope so!

 

2003.5_MSP

Member

:

2003.5 MSP

• Jul 17, 2014

• #8

Mine did this two weeks ago, and has stopped once i replaced radiator cap

 

R

ryanl

Member

• Aug 23, 2014

• #9

When my thermostat went, they engine started overheating and the overflow container was boiling over. Pretty common point of failure for these cars. It could be a partial failure too, thus the car not overheating.

 

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IllaNoizeTV

Member

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2003 Mazdaspeed Protege

• Aug 29, 2014

• #10

On mine it was the radiator cap.

 

J

juli2295

Member

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mazda protege es 2002

• Sep 18, 2014

• #11

Check the cap, if it broke, it wont hold the pressure and it will lower the boiling point of the coolant causing it to of course boil, yet your temperature gauge will be in the middle.