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Joined: 14 Jun 2004
Posts: 138
Location: United Kingdom

PostPosted: Sat Nov 03, 2018 2:42 pm    Post subject: Weaknesses of a 997 other than the engine.... Reply with quote

As I am currently in the process of starting an LS3 swap into my 997 3.8s (“Project half a cup” thread) which will eliminate all the weaknesses of the M97 engine. I also want to know what other aspects of the 997.1 people think could be improved,
One I will be addressing is cooling, so I will add a third rad and upgrade the other two, I will also be adding Porsche cup electric steering pump, adjustable bushes and some aero bits, as well.


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spongebob squarepants

Joined: 20 Dec 2009
Posts: 4964
Location: Manchester and Iraq

PostPosted: Sat Nov 03, 2018 2:57 pm    Post subject: Reply with quote

Going off at a tangent on the coolant element has anybody ever used waterless coolant with its enhanced cooling properties? Which seems ideal on a 911 where cooling is clearly a big issue?

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Joined: 07 Oct 2016
Posts: 1033

PostPosted: Sat Nov 03, 2018 5:32 pm    Post subject: Reply with quote

There are threads here somewhere. IIRC people recon it has issues. Hartech had interesting comments, try a search.

Interestingly magazines have fitted it but not provided long term assessments.

Oh and it's expensive, you need to factor in the flushing procedure....
2003 996.2 C2 Coupe Arctic Silver
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Joined: 24 Aug 2012
Posts: 935
Location: Scotland

2007 Porsche 997 Turbo

PostPosted: Sat Nov 03, 2018 11:28 pm    Post subject: Reply with quote

From what I've read, the 3rd rad isn't really needed unless it running in a hot climate.
The cooling problem is caused by the thermostat being on the return line to the engine on the original M96/97 engines.
I for one cant understand the reason for it being fitted there at all.

Assuming the LS3 has the stat on the water pump side it shouldn't be an issue.
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Joined: 08 Dec 2010
Posts: 72
Location: 997.1 Turbo Conv. 6MT

PostPosted: Sun Nov 04, 2018 3:25 am    Post subject: Reply with quote

Not too sure about the hot climate, I have a MY02 996 3.6 Carrera 6Mt 80k Miles completely standard and I regularly drive it in the summer when temperatures reach 55c. No issues whatsoever.
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