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Monkey Wrench
Join Date: Feb 2005
Location: CA
Posts: 919
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Oil warning light goes on when idling with a hot engine
When my engine is running a little hot, just a bit above normal operating temperature (usually in traffic), and I have my 911 in neutral the oil warning light goes on.
As soon as I put her in gear and give it some RPMs the light goes away. Actually, if I keep it in neutral and give it a little gas the light will go away but it will come right back when I let it idle again. My oil level is dead in the middle of the normal marks on the dip stick. I have a 1984 euro 911. Anybody have any ideas as to the problem? |
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10-12-2005, 08:40 AM
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Registered
Join Date: Feb 2004
Location: LaGrange, NY
Posts: 1,279
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slipping belt???
..oops thought you said alt light
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Looking for 87-89 Silver Cab 911, black interior, must be low miles, near pristine, no accidents, well sorted. |
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10-12-2005, 08:41 AM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,492
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What's your oil pressure gauge reading at idle? Should be around 1 bar.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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10-12-2005, 08:41 AM
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Registered
Join Date: May 2004
Location: Encinitas (San Diego CA)
Posts: 4,495
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Either you have low oil pressure or your oil pressure switch for the idiot light is broken. Hopefully, the latter.
Doug
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1971 RSR - interpretation |
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10-12-2005, 08:44 AM
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Registered
Join Date: Feb 2005
Location: Canada
Posts: 1,213
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I gets that tooo, but only when she is about die on me from not enough throttle (I sometimes start her up in 2nd as the tranny is tempermental)
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1972 911T targa |
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10-12-2005, 08:46 AM
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Registered
Join Date: Dec 2004
Location: PA
Posts: 1,162
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What wgt of oil are you using?someone suggested the other day to use 20-50 in warmer climates.
Last edited by pa911; 10-12-2005 at 08:56 AM.. |
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10-12-2005, 08:47 AM
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Monkey Wrench
Join Date: Feb 2005
Location: CA
Posts: 919
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I'm using Mobil 1 15W-50.
I'll check the oil pressure light the next time it happens. |
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10-12-2005, 08:56 AM
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In reading recently about my alternator issues, I saw one thread where the oil pressure light and alternator light had been reversed by a previous owner/mechanic.
It's worth checking, because a failing alternator would also begin to light up at idle and go away with RPM's. Craig
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'84 Carrera Coupe - B&B Headers and one-out muffler; K&N Cone intake; Steve Wong Chip; Euro height and corner balanced; 171K Miles (9/12) |
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10-12-2005, 09:01 AM
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Detached Member
Join Date: May 2003
Location: southern California
Posts: 26,964
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Pelican sells an oil fitting that goes between the block and the oil lines that feed the cams that is a little smaller internal diameter that is standard on newer cars than 84s that helps to boost oil pressure at idle. A number of people including me, have put them in.
Found it top of page this link http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_ENGcam_pg1.htm#item4
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Hugh Last edited by Hugh R; 10-12-2005 at 09:17 AM.. |
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10-12-2005, 09:12 AM
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Registered
Join Date: Sep 2005
Location: amsterdam
Posts: 231
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My instruction book says it's normal behaviour with a hot engine.
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carrera coupe 85 |
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10-12-2005, 09:21 AM
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