VW Polo Vivo Overheating

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djbaise

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I have a 2014 VW Polo Vivo 1.4 Trendline.
I'm having issues with an overheating problem. I've taken my car on 2 trips recently. The car is fine until you either stop or start driving on the highway. The temperature gauge goes right up to 130 degrees. The alarm in the dashboard starts to go off telling me that the car is overheating. Both times the car needed water. I took it both times to VW in Midrand and both times they told me the computer in the car needed to be updated. Today I was stuck in traffic and the car was fine until I passed the accident. Then there was free flowing traffic. I started driving at 120 km per hour and the car started overheating again. I checked the water this time and it looks fine. I've booked it in at another dealership but I need suggest to them? The car has 42000km on the clock and the warranty is expiring next year. I'm worried that the cylinder head could be blown or maybe one of the sensors is not working correctly. Please help.
 
Your water pump is most likely faulty
 
Theyre trying to ride it out till the warranty expires. Tell them they need to sort it out. That car is basically brand new.
 
djbaise said:
I took it both times to VW in Midrand and both times they told me the computer in the car needed to be updated.
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My God, some dealerships will say just about anything just to get rid of their customers, won't they?

It happens when stationary as well as at speed, so we can eliminate the cooling fan (more than enough airflow at 120 km/h). Definitely sounds like a thermostat or water pump, with the thermostat being more likely. You can tell the new dealership exactly what you told us - it overheats when you drive at higher speeds. Shouldn't take them long to correctly diagnose the problem. If you can, take it to Hatfield VW Bryanston.
 
It is most likely a faulty thermostat, but what is concerning is why the car is losing coolant in the first place!
They are sealed systems on most Vw's so unless it is leaking the water somewhere like from a hose or a leak in the water pump or radiator part of the system it might be burning the coolant away because of a faulty head gasket or cylinder head (worst case and most unlikely)
I remember after a radiator tank crack in a Subaru the dealer performed a chemical test on the coolant to check if there was any combustion gasses present in the coolant just as a precaution in case something is wrong with the engine.

But since it is still in service plan and in warranty take it to a dealer other than the one that blew you off and let them explain why the car is leaking or losing coolant in the first place and then obviously solve your overheating problem.
 
Overheating can cause steam to vent from the pressure cap.
Also, if it's pump, pump could leak through its bearings.
 
Drifter said:
My call as well. But why is he losing coolant?
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Leak in the system due to the pressure of the coolant not circulating properly, probably. Or evaporation if there's little anti freeze assuming op kept topping up with water which then will lower the boiling point.
 
Could be the thermostat, it's in a big plastic housing to the right of the air filter housing. Thing starts cracking and leaking, when it does the thermostat gets stuck.
The part is about R1800 and seems to be a common item to be replaced, when I took my Polos one in to Goldwagen it was four different pieces and the lady behind the counter knew exactly what it was in a second said it happened a lot.
 
Water pump I would guess. Dont think it is the fan because then the car would definately overheat while sitting in traffic. That happened to me when I was driving a Polo Playa. Radiator had to be replaced and the next day driving home was in traffic and the temp gauge went right up and steam started coming out of the bonnet. Next day took the car back and the twit forgot to plug the fcking fan in :mad:
 
1800 jeez.

Thermostat plus housing on my v6 merc was R330
From the dealer.
 
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c3n0byt3 said:
Wouldn't the thermostat get stuck open?
Thus it shouldn't overheat.
Also, OP states car overheats even with enough coolant.
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Not from my experience, because the water is leaking in the housing the thermostat isn't actually working properly.
 
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