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davidarose
Monza


Joined: 25 Jul 2007
Posts: 243
Location: Southwater, West Sussex


PostPosted: Thu Feb 23, 2012 5:38 pm    Post subject: Reply with quote

GT4 wrote:
Now try it in summer.


Ha Ha, my hands still sting from the scars from those damn manifolds, no chance! Surprised
_________________
MY2004 Midnight Blue 996.2 Carrera Aerokit Hartech'd + Mercedes GLE 350d
Previous: BMW X5 M 40d, Megane RS 265 cup, C63 AMG, Seal Grey 996 C4S, Lapis blue 986 Boxster S
 
  
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csubtil
Trainee


Joined: 17 Nov 2012
Posts: 56
Location: Portugal


PostPosted: Fri Jan 04, 2013 2:36 pm    Post subject: Reply with quote

Hi forum,

911 newbie here... So be patient.

I have the 04 996 C4S with 70.000 miles. On the 2 months I own the car, engine's temp never went higher than 80 ºC (middle mark, between the 8 and the 0).

My question is, since it already has the Turbo radiators being an S version, should I also upgrade to LTT?

Right now it's cold in Portugal (from 4ºC to 15ºC since I own it). But in the summer it gets really hot around here...

Had the car doing a major service 6 weeks ago, IMS and RMS seals at the OPC. Gave them full authorization to check/repair everything they found.

I am surprised they didn't replace the coolant on an almost 9 year old car. Previous owner did all the maintenance there, so was able to check history and it was never replaced before.

How long does the coolant last?

Should I go all the way and proactively replace water pump, coolant tank, coolant, LTT, etc... Before the summer or wait for the next minor service to come and do all this by that time.

Thanks.
CS
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2009 Porsche 997.2 Carrera 4S
17.500 miles
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Thu Jan 24, 2013 8:47 am    Post subject: Reply with quote

The gauge is slow (buffered) and low (the needle position you describe is actually 90°)

The LTT and any increased radiator surface area do different things.

You may wish to research this or just think about it.

For a start, it wouldn't matter how large your front rads are if the thermostat never opens!

There is no point in replacing things like pump or tank proactively (I mean there is no harm if you do, but no real benefit either).

They are very independently accessible, the only saving would be 1/2-1h drain and refill/bleed for pump replacement.

Coolant is rated as "lifetime fill" by Porsche, and unless you contaminate it (which includes tap water), then it should be fine.

However, just as I don't agree on a mechanical sympathy level with two year servicing, I think coolant should be changed every 5 years.
 
  
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csubtil
Trainee


Joined: 17 Nov 2012
Posts: 56
Location: Portugal


PostPosted: Thu Jan 24, 2013 10:32 pm    Post subject: Reply with quote

GT4 wrote:
However, just as I don't agree on a mechanical sympathy level with two year servicing, I think coolant should be changed every 5 years.


Thanks GT4.

I will just replace the coolant on the next service.

My 2004 C4S has a 2 year maintenance plan...

Maintenance done at OPC:
2004 purchase by previous owner
2006 minor service
2007 major service
2008 minor service
2009 major service
2011 minor service
2012 major service

So there was 2 times in which the previous owner drove with the same oil for 2 years...

Hope this hasn't harmed my engine.

CS
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2009 Porsche 997.2 Carrera 4S
17.500 miles
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Thu Jan 24, 2013 10:47 pm    Post subject: Reply with quote

For your car (and modern Porsche, in fact most modern cars) it has "extended" servicing.

For the later 996 that means 2 years or 12k miles (which ever is the sooner).

So it can still be in schedule at 2 years, I just prefer to service yearly whatever.
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Sun May 19, 2013 11:50 am    Post subject: Reply with quote

UPDATE:

Same mod to Maxie's 997 3.8 C4S (some subtle differences):

http://911uk.com/viewtopic.php?t=83808
 
  
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csubtil
Trainee


Joined: 17 Nov 2012
Posts: 56
Location: Portugal


PostPosted: Sun May 19, 2013 12:10 pm    Post subject: Reply with quote

csubtil wrote:

Should I go all the way and proactively replace water pump, coolant tank, coolant, LTT, etc...


Just to update on my previous concerns relative to the cooling system, I have replaced water pump+coolant+coolant cap last month (April '13) and I am really please I have done it. Engine's temp is touching 80 ºC, just like davidarose picture, even at 30 ºC external temp (very nice weather in Lisbon last week).

CS.
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2009 Porsche 997.2 Carrera 4S
17.500 miles
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Sun May 19, 2013 12:49 pm    Post subject: Reply with quote

Not sure where Maxie bought his from, but Bennets Motor Factors sell the housing, gasket and thermostat for £49.

This is a massive saving to what the restrictive sources were when I did the mod (looking at circa £150 for the set, or £70/80 just for thermostat insert)

And replacing the whole housing is one or two less stages in the mod (else you have to remove old thermostat insert, clean up the housing and refit the new thermostat insert).

http://www.bennetts.com/porsche-engine-timing-tools/porsche-low-temperature-thermostat-71-degree-with-gasket-and-housing-2216377-414401-830828.php
 
  
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csubtil
Trainee


Joined: 17 Nov 2012
Posts: 56
Location: Portugal


PostPosted: Sun May 19, 2013 1:29 pm    Post subject: Reply with quote

I ordered mine from Bennetts through ebay.

www.bennetts.com
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2009 Porsche 997.2 Carrera 4S
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Budweiser
Monza


Joined: 05 Jan 2009
Posts: 156



PostPosted: Tue May 21, 2013 4:59 pm    Post subject: Reply with quote

Ordered mine to Thumb

Thanks to GT4 a very helpful thread especially for a newbie Very Happy
 
  
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Zantaz
Suzuka


Joined: 14 Apr 2012
Posts: 1161



PostPosted: Tue May 21, 2013 7:04 pm    Post subject: Reply with quote

Is there only one manufacturer for these? are these the same as what Hartech supply and fit?
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Tue May 21, 2013 7:06 pm    Post subject: Reply with quote

No and no.

Unless you mean are they 71°C thermostats, in which case, no and yes.
 
  
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bazhart
Approved Trader


Joined: 20 May 2009
Posts: 958
Location: Bolton Lancashire


PostPosted: Wed May 22, 2013 8:58 am    Post subject: Reply with quote

Just to let you know we are passing on the benefit of increased volumes by reducing the original price to £50 including postage and Vat.

Baz
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You can trust us to "CARE FOR YOUR PORSCHE"
www.hartech.org
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Thu Dec 26, 2013 9:15 am    Post subject: Reply with quote

The wonder of completion! Wink

Don't forget, you can monitor your coolant temp accurately using the "secret" hidden digital temp display on the Climate Control unit if you have a 996.1/3.4:

http://911uk.com/viewtopic.php?t=81945
 
  
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Steff
Trainee


Joined: 16 Jan 2015
Posts: 95



PostPosted: Wed Dec 02, 2015 12:16 pm    Post subject: Reply with quote

Just having a look through the FAQs.

do people just tend to fit these on the 3.6 engine or is it a common mod on the 3.4 too.

Any disadvantage?
 
  
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ultegra
Monza


Joined: 29 Jul 2015
Posts: 201
Location: Chandler's Ford, Hampshire


PostPosted: Wed Dec 02, 2015 12:24 pm    Post subject: Reply with quote

I have one on my 3.4.

Fitted it at the same time as when I had the system open for fitting a central (GT3/Boxster S) radiator.

It's the original equipment brand - Wahler. They have to dremel the Porsche parts number off to avoid upsetting Stuttgart.

There's no need to interfere with the coolant drain plug, by the way. The coolant comes out just fine when you remove the hose from the thermostat housing.

Thumb
 
  
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coullstar
Albert Park


Joined: 15 Sep 2015
Posts: 1564
Location: Aberdeen/Torphins


PostPosted: Tue Jan 26, 2016 10:13 pm    Post subject: Reply with quote

IS there a torque setting for the thermostat bolts?
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Thu Feb 02, 2017 8:18 pm    Post subject: Reply with quote

Steff wrote:
Just having a look through the FAQs.

do people just tend to fit these on the 3.6 engine or is it a common mod on the 3.4 too.

Any disadvantage?


Mine was 3.4, and although the 3.4 runs cooler (as less powerful, and has less torque/shorter stroke, and less bore-scoring) and the coolant chamber design is upto 30% better than the 3.6, you can never get too cool! (well, circa 71degrees - the whole point of the thermostat is to regulate this!)
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Sat Feb 04, 2017 12:10 am    Post subject: Reply with quote

I just did my third LTT, and some of the awe and preciousness has gone for the Porsche brand.

By that I mean I was not wanting to be OCD about it, so this time it wasn't going to be Porsche (taxed) coolant.

So I used Comma G40 (Xstream), which is Elf/Porsche equivalent.

£22.99 from Halfords ready-mixed 50:50 5L (although I am sure you could source cheaper from elsewhere)
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30174
Location: Hertfordshire and Hampshire


PostPosted: Tue Feb 14, 2017 9:06 pm    Post subject: Reply with quote

FrazerPart @ £45 for OEM housing (part number machined off), OEM gasket, OEM-manufacturer thermostat (but lower 160F/71C rating) and delivery









 
  
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