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Monkey Wrench
 
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Join Date: Feb 2005
Location: CA
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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?

Old 10-12-2005, 09:40 AM
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slipping belt???
..oops thought you said alt light
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Old 10-12-2005, 09:41 AM
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What's your oil pressure gauge reading at idle? Should be around 1 bar.
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Old 10-12-2005, 09:41 AM
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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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Old 10-12-2005, 09:44 AM
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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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Old 10-12-2005, 09:46 AM
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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 09:56 AM..
Old 10-12-2005, 09:47 AM
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Monkey Wrench
 
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I'm using Mobil 1 15W-50.

I'll check the oil pressure light the next time it happens.
Old 10-12-2005, 09:56 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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Old 10-12-2005, 10:01 AM
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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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Last edited by Hugh R; 10-12-2005 at 10:17 AM..
Old 10-12-2005, 10:12 AM
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My instruction book says it's normal behaviour with a hot engine.

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Old 10-12-2005, 10:21 AM
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