Water overflow to spare tank.

[mines998]

To all sifus
I encounter a strange scenario whereby the radiator coolant overflow to spare tank and suspect head gasket given problem but open up check the gasket but no indication that gasket of leaking "metal gasket" so what other possibility can causing the problem?
Brand new radiator and 1.3bar new radiator cap.
Feel free to give yr opinion...

 

[^pomen_GTR^]

waterpump ?

 

[mines998]

Waterpump also new 1 and the thermalstat also remove.

 

[alwhitesat]

happened to me yesterday.....
what i did was flushing the coolant to check the waterpump if it's working well, checked and ok....so, most likely the radiator is clogged, not allowing it to run through the system causing the back pressure to spare tank....going to service the radiator today..

also, change the radator cap

 

[mines998]

I was using new forge radiator I wonder even new may cause if the workmanship no good.

 

[DanzEterna]

y not u try 0.8bar radiator cap 1st...

 

[alwhitesat]

fingers crossed...ur's is brand new

 

[mines998]

y not u try 0.8bar radiator cap 1st...

Danz if using 0.8bar water is more easier flow to spare tank.

 

[DanzEterna]

Ooo i didnt know...but u got try ah? or u need higher bar is it?

 

[mines998]

B4 this using 1.1bar is even worst. I think 1.3bar is max already or got higher 1? Maybe I don't know. I think the cap is not a problem just don't know what else can be.

 

[DanzEterna]

does your water boil in the spare tank?

 

[mines998]

Can see the bubble keep coming out in radiator. If normal drive water no boil but ramming water seem boiling

 

[^pomen_GTR^]

temperature normal or not??

or have u faced overheating previously???

 

[mines998]

Normal temp consider hot but still ok around 90 to 100 celcius. Base on stock meter slightly lower than half.

 

[DanzEterna]

as long the temp meter dont exceed half should be ok.
maybe there are bubble trapped in your radiator, have u done bleeding?