Overheating problem

[Garry20VT]

Hi I've gota 52 plate Cupra (not R) it's suddenly started overheating, if I keep it to 2000 revs it's fine at 90 degrees but take it upto 3000 or above and it shoots straight up to 120 degrees. The water level is fine no sign of any leaks external or into the oil. So I'm guessing it could be a thermostat problem.

Can anyone offer any advice, bit worried cos I'm working all day tomorrow then driving to Newcastle tomorrow night so need to sort it!

Cheers
Garry

 

[LEE69]

Water pump maybe not circulating the water?
Is it being pumped back in the top of the header tank?

 

[traumapat]

Water pump breaking down

 

[NickT]

As mentioned above, sounds like the water pump is on its way out.
I (and many others on here) have experienced exactly the same symptoms and it was the water pump.

Afraid it means a new water pump (metal impeller version although allegedly the OEM replacement has been updated with a better spec plastic one). Also get the cam belt (including new tensioner roller and tensioner) fitted while you are there.
As for your trip to Newky, I would look to getting a hire car I'm afraid.

Also meant to say, from what I've read on here, a faulty thermostat gives random fluctuating temperatures, usually between 0 to 90 degrees.

 

[andycupra]

above advice is good.

 

[Garry20VT]

Thanks lads, I was kinda hoping you weren't gonna say that!

Garry

 

[freddie434]

Yeh i have same problem keep it under 3500 revs n its fine yet give it some n thats it starts over heatin so jus slow back dwn again n goes back down to 90 degrees. Been 2 mechanic n they said could b 1 of 2 things, thermostat or blocked rad. They said if it was waterpump would b overheating straight away jus driving normally. Any advice, i got an idea what peps will say. Cheers

 

[LEE69]

Blocked rad is the same as no water pump working, they both stop the flow of water.

 

[freddie434]

How can i check rad is blocked? Not had the car long n was hoping for a reliable car bein part of VAG group!!

 

[LEE69]

What I'm saying is, it will the water pump.

Vag cars are reliable, pumps do wear.

 

[freddie434]

Cheers for reply n info, any more common probs 2 look out for?

 

[LEE69]

Coil packs , MAFS but i haven't had any problems with either since owning the car from May 08.

 

[freddie434]

sweet, well nice 1 4 that n ill get on 2 mechanic n get water pump changed, cheers

 

[LEE69]

If the cambelt and rollers haven't been changed, mays well whilst it is all apart.

 

[freddie434]

They have been changed been changed 10,000 miles ago so would they need doin as well or not, i no you shouldnt put a used belt back on but wat bout tensioners n rollers?

 

[freddie434]

Getting my waterpump n cam belt dne 2moz and all for £180, mates rates are sweet!!! so hopefully this over heating problem is solved. Fingers crossed!!!