[V6-12v] Radiator Fans not switching in correctly...

[The CyberPoet]

You can't tell by simply rattling it. You could tell by pressurizing  
it, but the only easy way to do that (that I know of) is to overheat  
the car, which is definitely not something you want to do if the cap  
has failed!

Cheers
=-= Marc

On Sep 6, 2006, at 7:02 PM, James Whitehouse wrote:

> Hi Austin,
>
> Thanks, the car has been very slow getting up to temp in the last few
> months, so I wonder if that could be a potential problem. I had  
> just thought
> the thermostat was getting dodgy, but perhaps the thermostat is a more
> recent problem that's stuck closed and now causing the overheating!
>
> Is there any way, short of replacing it, to tell whether the  
> coolant cap is
> faulty? For example, should it rattle/not rattle if you shake it,  
> etc?!
>
> Cheers,
> James