Boxster 1999 coolant reservoir tank is leaking

[Mark_T]

If you are going to do a coolant tank and a complete system flush, it would be a good idea to replace the water pump and thermostat at the same time, especially if they are original.

Also, you should get a new sensor and the upgraded cap for the coolant tank.

If you don't have the knowledge and tools to do all this work, your best bet is to let the dealer do the whole job. Probably around $1500 for everything.

[Hodan]

Thank you but I'm not sure I will flush the complete system because the car had the good original Porsche coolant fluid before I added some Motomaster when the tank started leaking! I think I put some of them a few times and the car still running great. I'm just gonna change the reservoir tank with et new cap and add the original fluid coolant in it. What do you think???