engine overheating in traffic jam

[pyrie]

Hi,
a heating question. These are the symptoms:
- in idle, engine is heating up nicely until the middle.
- while driving in a traffic jam, after a minute, engine starts too overheat. the minute I start driving again, temperature falls back perfectly.
- recently I was maneuvering in an underground parking and the temperature was rising al little bit more than I would have liked... very stressfull ...
But suddenly the fan kicked in really heavy (way too late in my opinion)

Could this be a temperature sensor, a fan sensor or maybe the fan itself?

Gr.
Pieter

[shogun]

2 things to check
1. visco fan clutch http://www.mwrench.com/Whitepapers/FanClutchtest.pdf
2. low and high aux fan http://www.nmia.com/~dgnrg/page_20.htm

[pyrie]

Thanks shogun!
I did the tests and its definitely the visco fan clutch.
It will take me some time to find parts and time to place them, so is it a good idea to use the aux fan and use a jumper so it runs on high in the meanwhile?
Or will the aux fan not have enough cooling power?

[shogun]

You can try that, but when the aux fan runs on high it is quite noisy sometimes. Keep an eye on the gauge when you drive like that.

[pyrie]

And I will try to avoid traffic jams

Thx!