cello

Bit OT, but I think it really interesting that Porsche cites use of non-OEM coolants and expressly mentions WW as a possible cause for the fitting failure in the first instance.

Per Porsche: "Causal and contributory factors include:... Use of non-OEM approved engine coolants (ex. Water Wetter, Summit Performance Racing Coolant, etc) with unknown chemical compositions and potential negative effects on the adhesive.." See Doc posted by Gofishracing here: https://rennlist.com/forums/10886258-post209.html .. p.14-15.

Reliance on 'possibilities' and 'potentialities' by a respected engineering Firm,... really Porsche?? Anyways...

Not that big a deal for us who are out of warranty but those on the 997 Forum might be interested on P's position on use of WW ..

Gofishracing

Thank you for completing the circle. It's the original decision to glue instead of a more expensive casting is my thought.. They later used a different adhesive it appears. It is a safety factor but may not be enough vehicles for them to care. NHTSA has not responded yet that I am aware of.

85Gold

Porsche is just try on to confuse the issue citing aftermarket additives is causing the failure. Mine had OEM Coolant it's whole life before if failed. Now welded and distilled water + Pencool 2000. Since I live in the old folks state freezing is not an issue.

As for banning cars that dump fluids you need to ban C6ZO6's also. I have seen more Vettes lunch motors than Mezger's dump coolant.

That being said if you are cognizant of the Porsche fitting failure and don't take remedial action before tracking Shame on You

Peter

Gofishracing

Yes- I've run over Corvette parts at POCONO. lost some windshields- Still better than hitting liquid.

9.5 Degrees

So what's the bottom line? these cars are reaching the 10 year mark and Porsche NA doesn't have to do anything to remedy the problem once that happens, correct? even with the NTSB investigation?

JohnPG

9.5 Porsche's remedy if you blow a coolant fitting is to re-glue the fitting on. Other than that no fix.

KOAN

My understanding is that the friction coefficient of water is not that different from coolant, when compared to dry pavement and tire traction. Water, however, will evaporate relatively quickly, while coolant will not. That is the main reason to use water and water wetter instead of coolant.
I welded mine, so I'm using coolant, which is much better for the engine for many other reasons. I expect no relief from Porsche when the dust settles. I just wish I didn't like my 6GT3 so much, or I'd consider something else.

FFaust

That's the problem, warts and all, there is no substitute.

Gofishracing

simple at this point. If you are a track guy with an aging car fix it or move on. No surprise if it comes unglued.

mkk62

I think peter (85gold) was referring to is blown vette engines with oil spills. The only fluid I have run over and nearly crashed(died) on turn 17 Sebring was twice from vette oil spills after engine blew Water wetter is not so much less slippery than antifreeze. My lines are welded. Mk

996FLT6

Any stats on duration of coolant sticking on tires vs waterwetter? I can tell you if I spin on water I'm back on track but coolant I'm heading back to paddock for sure. Mike

Rob S

mkk62,

Where did you get that chart showing the friction coefficient comparison? Any chance you can post a link to the whole document?

Oops. Never mind, I just saw that it was from the Redline Oil website. I found it. If anyone else is interested, it's here:

http://www.redlineoil.com/content/fi...ech%20Info.pdf


Rob

Gofishracing

less pregnant