Boxster 1999 coolant reservoir tank is leaking

[Smallblock454]

Coolant fluid: Porsche uses Glysantin G40 for 986 cars: G40® | Glysantin®

Here is the Glysatin G40 data sheet: http://www.glysantin.de/fileadmin/Files/Downloads/Technical_DS/technisches_datenblatt_g40_eng.pdf

Please note that there are some aftermarket manufacturers that make the same product. But i don't know availabilty in the US/Canada. So you have to do research yourself.

Couldn't find a detailed specification about the Motomaster coolant fluid: MotoMaster Long-life Premixed Antifreeze/Coolant | Canadian Tire but i'm pretty shure it's not compatible with the special G40. So i would recommend not to drive the car until you have the reservoir replaced. Also you have to flush the complete system now. Sorry for the bad news.

@ Mark_T: The fluid he used is premixed. Take a look at the label.

Regards, Markus

[Hodan]

I think it's really a bad news!!! I drove the car last year from May until November with the Motomaster fluid coolant. I didn't know if I shouldn't put it. but I'm not gonna drive it until I change the tank and flush the system like you said guys. It still running great then, It's my first Porshe.
Thank you guys

[Hodan]

Do u have an idea how much to flush the complete system?

[Mark_T]

Originally Posted by Smallblock454

@ Mark_T: The fluid he used is premixed. Take a look at the label.

I know, but the Porsche coolant isn't.