Technical over heating???? why????

Currently reading:
Technical over heating???? why????

TicTac

New member
Joined
Aug 13, 2010
Messages
3
Points
1
Hi all.

I am a newbie to the fiat world.

I would be grateful of some advice, I recently bought a seicento sports which is a great little car. It has started overheating (header tank boiling like a kettle), I have replaced the thermastat switch as water was leaking from there, the fan dosent kick in at all it just boils!! all the hoses are getting warm as they should so i didnt think it was the pump but now i am not sure........

Any ideads would be greatly appreciated

Many thanks in advance

TicTac
 
Hi Rally

Excellent question three others:-

- Where was this 'thermostat switch' located, and what did it look like?
- Did you bleed the system before starting the engine after addressig the leak?
- has the auto been maintained properly?

Noel
 
Thermo switch on side of rad.
seicento is a sporting? petrol! not sure about anything else.
rad fan not working ? where does the live feed come from? battery direct or volt drop through relay?
fuses ok.
auto???? manual.

if the car gets warm inside surely the pump working ok, system has been bled heat in pipes top n bottom.
 
Hi

If the fan does not run when you short the connections on the plug to the switch you fixed the leak for, be careful, remove connector and short connections on cable with paper clip, then:

The fuse is kaput.
The fan is kaput or
The earth for the fan is corroded, most likely, cheap to fix

Try taking a 12v to each connector (of the pug you have off) if the fan does not run and the fuse is ok and the bonding is good, if this does not run the fan try 12v and earth to the fan connectors.

If the fan runs then the switch may be kaput or there may not be enough circulation (e.g. blocked rad) or the pump may be ineffective, (e.g. damaged impellor).

The supply is from the battery via a fuse if you have a SPI (single injector in throttle body).

Noel
 
Thanks noel that was heplfull the car is T reg. one thing we have already tryed is shorting the plug with a small spade fuse and the wire from the battery almost caught fire?? it got very hot very quick! thats wat made me think it was regurlated by a relay rather than a direct feed. the rad is brand new as it was replaced by the last owner and still shiney. i think i may need to bench test the fan as that looks like an old one and wasnt replaced after an acciedent. i will strip down tommorow and volt test and let you know how i get on.
thanks for all your help.
 
The car needs the fan if you use it without a working fan, you need to have the heater on and the heater fan on full boost unless you are cruising at 50mph on the motor-way, or similar - in stop start traffic it will boil for sure, even with the heater fan on...

The heat gaskets are prone to fail after overheating...

Noel
 
Back
Top