Scirocco Central

Hi people, I have a 2.0 Tsi and just wondered if anybody elses does this or if I need to book my car in for a check up....

Basically after a journey in the car, say 10/15 mins at a speed averaging around 50mph, when I reach my destination and turn engine off etc, you can hear a 'clunking' noise where the exhaust/something underneath is cooling down. I suspect this normal, but want to make sure mine isnt overheating. The temperature gauge is normal all the time (ie dead on half way)

Yours Paranoid

Class.

xxx

Mine does the same, especially after iv driven it hard..I dont think theres anything to worry about

Cool, cheers mate.

The "clinking" noise you are hearing comes from rapid cooling of metal parts. Most types of metal will emit a similar sound when cooling rapidly.
In our case it is a normal sound and causes no damage on its own, but it suggests something done wrong....
You should really let the engine stand idle for at least a minute b4 shutting it off, and even longer if you have pushed it a bit.
The reason behind this is the turbo and supercharger (if you have one).
The turbines in your boosters spin at quite high velocities causing high temperatures. The one in the turbo will keep spinning a bit even after the car has been shut off.
When the car is shut off the oil circulation to the boosters stops. If this is done pre-maturelly while the boosters are still super hot the oil that is in the booster unit will get very hot.
The oil in the boosters will then burn and in turn cause clogging of the passages (yeah, kinda like high cholesterol and our heart )
Next time you run your car the booster cooling will be just a little bit worse then the last, and so on....

...uhm.... I think that's at least partially right

∫

The Scirocco actually has an electric pump which circulates coolant through the turbo to cool it down once the car is turned off. Having said that it's still good practice to let it idle a bit.

rocknob wrote:The Scirocco actually has an electric pump which circulates coolant through the turbo to cool it down once the car is turned off. Having said that it's still good practice to let it idle a bit.

Sweet, didn't know that. Wonder if it works that way for both boosters on the 1.4 Worth looking into
Also new-age synthetic oils clog much less then the old ones.

So I guess what rocknob wrote together with synthetic oil renders my previous post well..... wortheless