Hi, my car keeps overheating, i have changed the thermostat, flushed the radiator, checked for leaks and is still overheating from the header tank. Have you any suggestions on what i can do.
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Re: Overheating fiat seicento
I hope you have managed to solve the radiator problem by now. Seicento seem to suffer from water flow blockage in the heater blower area. I recommend you check the piper behind the carburator and make sure water is flowing. Normally when these pipes are blocked, water will flow back to the expansion tank and start leaking through its cap. You can also open the small screw on the small pipe coming out from the back panel behind the carburator and see whetehr water flows. Also, if the water is heard grumbling when engine is switched off, it is highly likely that the water is not flowing through the heater unit. Hope this helps.
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If the overheating is only occasional, it sounds like the radiator still has some blockage that moves around and plugs up again. Try flushing it backwards again. If it continues, consider a new radiator. A radiator is cheaper than head gasket work, which may happen if it keeps overheating.
Is the fan coming on? If not, possible lower radiator fan switch/sensor? No leaks... So overflow tanks level stays stable? How do you know it is overheating? Elevated temp guage? Engine smells overheated? Both? We need more info.
This may be a puzzle...
The seicento (I drive the same car) likes to create problems in the heater section of the cooling system. The small pipes to it (behind the carburator) may be blocked or the entire heater may simply be dirty. Flushing the system with a water hose may help. Usually this problem starts slowly and goes away if you re-start the engine and then excellerate a few times. Check if your heater blows hot air - if yes, and if he keeps blowing hot air (does not cool down and get cold) ther is no blockage. If you have a blockage, your heater will only blow hot for a little while and then comes normal cool air - if this is the case, you have a blockage right in your heating system which runs your cooling system hot and the cap of your cooling tank will start leaking. This is a comon problem on older Seicentos....
Other general problems can also be the case, like defective thermostat, fan motor does not come on (check fuse and relais first).
In some cases, ther might be some air trapped in the cooling system and doing the above will also cure it. At last, check if your water pump is working.
bubbling into the overflow may mean a head gasket is gone, it may also mean the radiator or thermostat is blocked. or there is a leak
Clean and flush radiator, check the radiator fins for corrosion
pressure test coolant system
(if this is ok then)
try to clean and decloged your radiator on service center,some impurities,rust ans debris are blocking the flow of water and coolant on radiator,check also your water pumps system it performance and effeciency.have anice day,
note that thermostat and water pumps eare both part of the cooling system you neded to ck them for proper fonctioning .,ck the radiator fans electric motors for blowing propely ,ck radiator for clogs in the lines ,hoses for leaks ect.......
could be a number of things
make sure your fan is working
is the coolant leaking?
make sure your water pump is operating
check the thermostat
and also yes try a flush
also inspect your radiator cap and the overflow
let me know if you need further assistance
hi check your thermostat, waterpump, radiator and cap, hoses, fan if you can see a visible leak then i can talk you through a solution if its not leaking try flushing radiator, change the cap, make sure your fan is working, make sure your water pump is working u can test by removing the radiator cap with the engine running you should be able to see the coolant flowing not just sitting still if you need more assistance let me know