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Superunknown
Spa-Francorchamps


Joined: 19 Jun 2006
Posts: 339
Location: Cardiff


PostPosted: Tue Jul 04, 2006 2:07 pm    Post subject: Reply with quote

Something not quite right or common to 964's?

Oil pressure needle moves quite a bit when driving but sometimes when I come to a stop the needle will touch the 0 mark, activating the warning lights. However when i then pull off the needle returns to 4/5 and the warning lights go out.

Should i be concerned or need any parts replacing??


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Justin
964 C2.
 
  
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Carrera
Estoril


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PostPosted: Tue Jul 04, 2006 2:25 pm    Post subject: Reply with quote

Oil pressure is meant to be changing while driving, how about the oil level indicator? You need the engine warm, idleing on flat surface, then look at the level, should be @ half way, or more accurately check the level manually.


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Superunknown
Spa-Francorchamps


Joined: 19 Jun 2006
Posts: 339
Location: Cardiff


PostPosted: Tue Jul 04, 2006 2:29 pm    Post subject: Reply with quote

Oil level sender is knackered as the gauge is off the scale when the electrics are on. CHecked the level on the dipstick and its just below half way between the notches. Could this effect the oil pressure gauge or maybe a faulty oil pressure sensor or something?

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Justin
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PostPosted: Tue Jul 04, 2006 2:41 pm    Post subject: Reply with quote

Oil level seams right, but the idle pressure should be on the 2-3 mark (and not 0), and running pressure should be all the way up to 5. Don't know what might be faulty and someone with better knowlege might chime in, otherwise let the professional check it out.


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Superunknown
Spa-Francorchamps


Joined: 19 Jun 2006
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Location: Cardiff


PostPosted: Tue Jul 04, 2006 2:55 pm    Post subject: Reply with quote

On idle its around 2-3 as you say, and then up to 5 when driving. But sometimes if i brake to a halt at a junction for instance the needle will dip to 0 (activating warning lights) but as soon as i put power down the needle will return to normal. Irritating at the moment but wondering whether theres a potential problem lurking somewhere?

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Justin
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F1_Dragon
Watkins Glen


Joined: 25 Jul 2005
Posts: 2015
Location: London

2002 Porsche 996 Carrera 4S

PostPosted: Tue Jul 04, 2006 3:55 pm    Post subject: Reply with quote

I have something similar to this on my 996, but i guess could also apply to 964...

http://www.911uk.com/forum/display_topic_threads.asp?ForumID=12&TopicID=7026&PagePosition=1

as yet unresolved but Sid the friendly spanner is of the opinion it could be either the pressure switch, pressure relief, or instrument cluster. I will be it getting checked out probably this weekend...

HTH


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Haran
996C4S
 
  
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Porsche Torque
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Joined: 29 Apr 2006
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1987 Porsche 930 Turbo

PostPosted: Wed Jul 05, 2006 9:15 pm    Post subject: Reply with quote

what oil are you using in the 964 justin ?

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Superunknown
Spa-Francorchamps


Joined: 19 Jun 2006
Posts: 339
Location: Cardiff


PostPosted: Thu Jul 06, 2006 8:59 am    Post subject: Reply with quote

I've only had the car 2 weeks so not sure what oil is in it. Plan to get a service v.soon and it was suggested I put Castrol 10 40 semi synthetic in. When I check the dip stick its hard to read the level as the oil is very clean, and to me looks too thin.


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Justin
964 C2.
 
  
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ian_uk
Imola


Joined: 24 Jun 2005
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PostPosted: Thu Jul 06, 2006 5:46 pm    Post subject: Reply with quote

Oil pressure shouldn't dip to zero. About 1 bar minimum is OK. Could be a problem with the engine or the sensor. Or could be the oil in it is too thin.

A lot of people put 15W-50 in 964s as the best viscosity for these engines.

Ian.

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