Quote:
Originally Posted by James.uk
Take the cover off underneath the engine, that will help you find the leak. For speed, take the car to a garage and get the system pressure tested, that will force water out of the leak so you can see it.. 
As the pressure test involves fixing a lil hand pump onto the rad cap hole, you wont be able to tell if the cap leaks. I suggest you replace that anyway, they don't cost much and they do tire with age.
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what pressure are the systems pressurised to? i have tools to make such a device but obviously dont want to put too much pressure in and blow a pipe off or split something
