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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 1:57 pm    Post subject: Car running hotter following service / oil change Reply with quote

Hi all
Just got my 996.1 c2 back from service / oil change and noticed the car seems to be running a little hotter than it did before at full operating temp (see pics):

Before (didn’t move above 80)



After (fluctuates between just above 80 and half way between these markers)



It’s fitted with a low temp thermostat
I decided to use millers nanodrive 10/50 oil.

Before the service I never saw the needle move above 80 (as per pic)
I’ve checked and the fans are kicking in.

Any ideas as to why it might me displaying a slightly higher temp on the gauge now ??

Only other point to note is that I was always running with ac on (to help with idle speed) as I had a small hole on oil filler tube that was also fixed as part of the service so this increase in temp was noticed with the ac off.
Maybe running with ac on was masking the slightly higher operating temp ??

Any thoughts people

Dont know

Thanks
_________________
98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8660
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Mar 22, 2020 5:23 pm    Post subject: Reply with quote

What was the old oil, did you go thicker, thinner or the same oil.
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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 5:42 pm    Post subject: Reply with quote

infrasilver wrote:
What was the old oil, did you go thicker, thinner or the same oil.


Same I think as car new to me but think it was running millers 10/50 before but would need to check paperwork again..

I also went for “millers nanodrive 10/50”

Just popped out for another look and did some measurement via temp gauge on AC unit.

Highest I observed after a good run and on idle (before fans) : 103
Fans then cooled to 89 over time
Out on a run maintained about 85-90ish..

Does this sound about normal Dont know

One other thing, can anyone advise when fan on engine lid is active ?
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98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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P0tential
Newbie


Joined: 08 Jun 2019
Posts: 37
Location: Finland


PostPosted: Sun Mar 22, 2020 6:14 pm    Post subject: Reply with quote

Running the AC will make the rad fans run at half power all the time => car runs cooler.
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Sun Mar 22, 2020 7:35 pm    Post subject: Reply with quote

Agree
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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 7:39 pm    Post subject: Reply with quote

deMort wrote:
Agree


Thanks deMort !
Does what I’ve described sound about normal operation for a 996.1 c2 running 10/50 with LTT ?
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98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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Parsley
Silverstone


Joined: 12 Jan 2020
Posts: 108
Location: Hebrides


PostPosted: Sun Mar 22, 2020 7:40 pm    Post subject: Reply with quote

I'd be concerned about the oil pressure being so low, even at idle 1.25 Bar? Looks low to me.
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Ex 930 Turbo
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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 7:48 pm    Post subject: Reply with quote

Parsley wrote:
I'd be concerned about the oil pressure being so low, even at idle 1.25 Bar? Looks low to me.


What does everyone else’s idle at when really warm ?
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98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Sun Mar 22, 2020 7:58 pm    Post subject: Reply with quote

Details of fan operation which has just taken me 15 mins to find lol ...

Your car is well within specs shall we say .
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She's not going until july 2020 though .



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kas750
Shanghai


Joined: 31 Mar 2013
Posts: 4713
Location: Chorley lancashire

2006 Porsche 911

PostPosted: Sun Mar 22, 2020 8:02 pm    Post subject: Reply with quote

[quote="adamw"]
Parsley wrote:
I'd be concerned about the oil pressure being so low, even at idle 1.25 Bar? Looks low to me.


What does everyone else’s idle at when really warm ?[/quote
It's on the low side of ok
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Sun Mar 22, 2020 8:15 pm    Post subject: Reply with quote

The pressure gauge is not that accurate .. if you truly have low oil pressure then at idle you will get the red light flickering on ..

Its best not to get too fixated on a single gauge , whilst that's easy for me to say as it's not my car its all i can say as a mechanic with one or two years of experience .
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She's not going until july 2020 though .



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Marky911
Sepang


Joined: 04 Jun 2009
Posts: 2911



PostPosted: Sun Mar 22, 2020 8:25 pm    Post subject: Reply with quote

Evenin’ Adam,

Not sure what Mark (other Mark) put in it last year but I always put 10/50 millers in.
Temp might be a little higher than I remember but not sure. Deffo has an LTT fitted which was brand new a couple of thousand miles ago.

Oil pressure is absolutely fine. Anything over 1bar at hot idle is fine and that gauge is reading about 0.2 bar down. Checked with a mechanical gauge when I had it.

They do vary from 1bar even upto 2bar. Although most cars showing nearer 2bar will actually have an iffy gauge that’ll read above zero before the car is even started.
Craig’s Hartech rebuilt car sits at 1.2bar after a spanking.

Only worry if the low oil pressure light flashes on the dash. Wink
(And that’s set at 0.6 bar out of interest).

What was the story with the oil filler pipe? Just split? It was fine when I had, so I blame other Mark. Very Happy

Edited - Demort beat me to it.
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Sun Mar 22, 2020 8:44 pm    Post subject: Reply with quote

Embarassed sorry !

As i said .. its best not to get too fixated on a single gauge .. the car is not young and they were never that accurate im afraid .. its an indication is the best way i can put it .
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

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Indy Mechanic .
 
  
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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 9:31 pm    Post subject: Reply with quote

Infrasilver - just checked and it was millers nanodrive 10/50 used last service too so same oil according to history.

DeMort - thanks for digging out the Fan info.. much appreciated! Thumb
Hear what you’re saying re oil pressure gauge and age of car.

Mark - evening mate.. thanks for the info re oil pressure gauge. I was a little worried for a mo.. No oil pressure lights flashing on dash Smile

So sounds like what I’m seeing is normal then ?? Dont know
Just a bit concerned as could have sworn it ran cooler before I had the oil changed but maybe I’m mistaken and am comparing apples with oranges as different circumstances? Dont know

Re oil filler tube. PPI when I purchased reported a small hole in oil filler tube (possibly caused by rubbing against something on the bay and wearing over time) that could possibly cause air leaks / rough idle etc so decided to get it sorted whilst in for oil change ...

So is the consensus, that I’m worrying over nothing Very Happy
The temps I’ve quoted, sound ok?

Just confused what could have caused a possible change in engine temp..
_________________
98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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cvega
Spa-Francorchamps


Joined: 25 Feb 2013
Posts: 314
Location: Cambridge


PostPosted: Sun Mar 22, 2020 9:36 pm    Post subject: Reply with quote

oil pressure is fine, what about that Voltage tho ? shouldn't be 14+ when running? Surprised
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adamw
Reims


Joined: 09 Jul 2009
Posts: 4024
Location: West Sussex

1998 Porsche 996 Carrera 2

PostPosted: Sun Mar 22, 2020 9:45 pm    Post subject: Reply with quote

cvega wrote:
oil pressure is fine, what about that Voltage tho ? shouldn't be 14+ when running? Surprised


Surprised Surprised

What could cause that ?
Duff battery ?

This was reposted on the PPI when purchased:
Battery clamp is loose and will not tighten up, further investigation required

Could this be the culprit .. Dont know
_________________
98’ 996 C2 aero (gt3), Swartz Black, GT3 style fixed buckets, GT3 (style) momo steering wheel, original GT3 wheels, KWV3’s, red callipers, power flow stainless exhaust

EX : 02' 996 Turbo Coupe ( May 17 - Sept 19 )
EX : 95' 993 C4 Coupe ( Dec 10 - Oct 16 )
EX : 00' 996 C2 Cab ( Jul 09 - Oct 10 )
EX : 03' 986 Boxster S ( May 06 - Dec 08 )
 
  
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kurlykris
Sepang


Joined: 30 Jun 2014
Posts: 2785
Location: Warwickshire


PostPosted: Sun Mar 22, 2020 9:47 pm    Post subject: Reply with quote

cvega wrote:
oil pressure is fine, what about that Voltage tho ? shouldn't be 14+ when running? Surprised


Should be over 14V when running and under load Thumb
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1998 996.1 C2 3.4 with "Aerokit Cup"
2006 987.1 Boxster S 3.2 sport chrono
2010 Mercedes E350 AMG Sport

 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8660
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Mar 22, 2020 9:49 pm    Post subject: Reply with quote

The voltage dial looks fine to me.

The clamp will have just stripped its thread, a helicoil or new/used battery tray will cure that and is nothing to do with the voltage produced.
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cvega
Spa-Francorchamps


Joined: 25 Feb 2013
Posts: 314
Location: Cambridge


PostPosted: Sun Mar 22, 2020 9:52 pm    Post subject: Reply with quote

adamw wrote:
cvega wrote:
oil pressure is fine, what about that Voltage tho ? shouldn't be 14+ when running? Surprised


Surprised Surprised

What could cause that ?
Duff battery ?

This was reposted on the PPI when purchased:
Battery clamp is loose and will not tighten up, further investigation required

Could this be the culprit .. Dont know


alternator or the regulator on it..
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kurlykris
Sepang


Joined: 30 Jun 2014
Posts: 2785
Location: Warwickshire


PostPosted: Sun Mar 22, 2020 9:56 pm    Post subject: Reply with quote

The gauges aren`t particularly accurate, I would stick a Multimeter on the battery with the engine running and headlights and heater on full as a first test and see what you get, should be 14v Thumb
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2006 987.1 Boxster S 3.2 sport chrono
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