Technical water temperature while sitting in traffic

[blu73]

well does it take the car along time to warm up compared to usual? And does the temp drop lower than usual when driving along at say 50mph.. If not the the thermostat is more than likely opening and closing as it should..

I would try bleeding first though, i assume the punto has a heater box bleed screw like a cento, been too long since i messed with anything other than the GT i can't remember

 

[flisko]

so i just changed thermostat again and while getting car up to temp i noticed antifreeze level dropped to min so i turned the car off and went to check level again and it was almost to max so i turned the car back on and level went back to low

there are no leaks, i did bleed it

went for a drive and temp gauge never reached middle, i did put in a used thermostat tho
gonna try genuine fiat one tomorrow

 

[flisko]

eaten material around thermostat bolts

 

[flisko]

original termostat fitted but still got this problem

so i just changed thermostat again and while getting car up to temp i noticed antifreeze level dropped to min so i turned the car off and went to check level again and it was almost to max so i turned the car back on and level went back to low

car ON-and warmed up- antifreeze level on min, car OFF antifreeze level goes few cm below max

unless this is normal

 

[fingers99]

I'd get a real thermostat (new one) and use some RTV on the gasket. Points to acid in coolant (either no anti-freeze or never changed and combusion gases getting into it, turning it to acid).

I still think you have some air in there.

 

[dumbledore]

car ON-and warmed up- antifreeze level on min, car OFF antifreeze level goes few cm below max
unless this is normal

I will start suspecting the head gasket if you get symptoms like this.

 

[flisko]

I'd get a real thermostat (new one) and use some RTV on the gasket. Points to acid in coolant (either no anti-freeze or never changed and combusion gases getting into it, turning it to acid).

I still think you have some air in there.

i did fit new one

i changed antifreeze this january and again when i changed thermostat 3 days ago dunno how often it was changed before

looks like back to bleeding

 

[fingers99]

Compression test. If the stat to head mount looks like that, GOK what the head is like.

Did you skim or just swap out the gasket?

 

[flisko]

i used gasket + rtv gasket sealant

 

[fingers99]

i used gasket + rtv gasket sealant

On the head? Compression test! You should never, ever, use RTV on the head to block joint. It needs to be flat and spotless (as in, cleaned with panel wipe or acetone -- petrol if you must).

The gasket pretty much chemically bonds to the head and block, RTV or grease or filth will tend to prevent that happening and RTV can't handle those kind of temperatures.

 

[flisko]

i used rtv in january when i first changed thermostat and no leak
or are you saying i destroyed engine head in 9 months with it?

this is the one

 

[dumbledore]

I believe Fingers means not to use RTV on the head gasket replacement. Use RTV on the thermostat probably is OK and should not cause a head gasket failure.

 

[flisko]

bled it again, some more air came out , but that min to max anomaly is still occurring -or is this cuz air is still inside?
car behaves same as before tho

 

[dumbledore]

As long as you don't loose any coolant and the engine is not overheating then hopefully you are OK. If you need to often bleed the system then head gasket again may need attention. When was the head gasket last changed?

 

[flisko]

dunno if head gasket was ever changed
will try bleeding again

 

[fingers99]

Compression test. It's the only way to be sure.

 

[flisko]

lets say it is head gasket, would that cause rise in antifreeze from min to almost max when i turn off car?

 

[dumbledore]

lets say it is head gasket, would that cause rise in antifreeze from min to almost max when i turn off car?

I believe so yes, at least this was the symptoms I had when my head gasket gave up, same car.

 

[fingers99]

It could. Either air is still in there, or it's getting in there somehow. Compression testers are very cheap nowadays.

 

[flisko]

I believe so yes, at least this was the symptoms I had when my head gasket gave up, same car.

you had any other symptoms than that?