All Things Mk5 > How to Guides / Troubleshooting

Edition 30 Overheating

(1/3) > >>

cpk:
Wonder if anyone has ideas around this...my 114000 mile Stage 1 Edition 30 has started to have issues with high coolant temperatures.  At first, the fan started coming on after anything but a very short journey, but no other issues. Then, I started noticing the coolant temperature creeping up above 90C.  An independent specialist checked for fault codes, ran a live test, replaced the engine temperature sensor and bled the coolant system with no effect, so the next change was a new main cooling fan/control module.  Again, no effect.  The problem has continued to get worse, and on motorway journeys, the coolant temperature gets very close to the red zone.  I regularly check the oil level and keep it topped up but after a motorway run at the weekend, the oil level light came on.  I topped it up, drove the car 170 miles home and it had drunk about half a litre.

What would you guys advise next?

GVK:
Has it had a water pump on at all? Pump impeller could be spinning on the shaft.

cpk:
It had the pump and cambelt done 7 years/50000 miles ago.  I'd actually booked it in to the garage to get the overheating fixed, and a new belt and pump done at the same time, but the mechanic advised holding off on the belt and pump until the overheating was fixed.

Is there a way I can tell if the impeller is spinning on the shaft?

Thanks for your help.

FJB:
Take off the pipe at the top of the expansion tank and put it into a bottle, start the engine, if coolant goes into the bottle the pump is working.

exodus_ste:
I've had similar issues with mine over the last year or so. Although the cause of mine is still unknown, my problem is slightly different - no cooling fans. Replaced the fan/controller pack a few months ago assuming this was the issue but it hasn't helped.

My problem occurs whilst sitting idling/crawling in traffic. As soon as i get 15/20 mph there is enough air passing the rad to cool it.

Weirdly, the fans work perfectly in output tests using vcds and occasionally they will work. Also, when the engine is over 90 and i turn it off, the fans come on! Work that bugger out!

I did confirm the pump was working using FJB's method. Also changed both temp sensors.

Have you got vcds? The fact yours is overheating during driving sugests you have no circulation or a thermostat is stuck closed possibly. Does putting the heaters on max temp and full power bring the temp down?

Navigation

[0] Message Index

[#] Next page