Hi everyone. Hope all are well. My GT4 is coming up on 11 years and I was wondering how many of you have done full coolant change? My coolant looks fine. I was able to get a sample and using litmus paper test I found the pH to be a little over or close to 7. I tested a friend 2019 911 GTS and his too was about pH 7 and both vehicles appeared to have about 50:50 Coolant to water mixture. I then took new coolant and mixed it with distilled water 1:1 and its pH was closer to 8-9. So my question is have any of you flushed and replaced your coolant? I know Porsche say lifetime but my concern is if it gets too acidic then it could damage the aluminum parts. Would love to hear if you changed yours? Thanks

 

Easy diy, so yes.

 

I change the coolant out every 4 years

 

I have a low mileage 2015 and went ahead and had coolant changed. Just make sure you use an experienced Porsche shop, and that they work on it COLD to avoid coolant spraying everywhere, running down the side of the car inside the body sill and finally dripping out behind the right front tire for weeks until it's dry causing everyone to go nuts looking for the non existent coolant leak. (Or so I've heard lol )

 

I just did mine (DIY) last month at about 22k miles. I followed the drain and fill from this video: 981 Coolant change. The only thing I did different I used my PIWIS III to do the bleeding procedure. Worked perfectly. Similarly to the video, I DID NOT disconnect the radiator hoses up front. As he did in the video, I blew low pressure air into the system and a ton more coolant came out. The vacuum filler worked fantastically.