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oil pressure

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Old Mar 16, 2009 | 06:48 PM
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Default oil pressure

10-15 psi ok at idle? sounds like it might be a little low but? what cause low oil pressure? bad pump? the motor doesnt knock at all, its an lt4
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Old Mar 16, 2009 | 07:36 PM
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I wouldn't sweat that at hot idle.

I have seen older motors(like mine) that are loose and that is about right for hot idle. Let's wait for some LT4 gurus to chime in to be safe but as i wrote it wouldn't alarm me.

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Old Mar 16, 2009 | 08:08 PM
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Doesn't appear to be too low. Does the pressure increase as soon as the revs increase?
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Old Mar 16, 2009 | 08:11 PM
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I notice my LT4 doing that, it gets up to 40+ once I rev it. I can't wait to put this animal on the road
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Old Mar 16, 2009 | 10:06 PM
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Thats about what my L98 has at hot idle an I haven't had any problems...WW
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Old Mar 17, 2009 | 02:53 PM
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Ten sounds a little low to me. On an LT1 you want to see a floor of about 15-20 at hot idle.
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Old Mar 17, 2009 | 03:21 PM
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I've never seen my stock '88 (131k) L98 pressure below 22 on the hottest of summer days.
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Old Mar 17, 2009 | 08:51 PM
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Originally Posted by Camaro350z28
10-15 psi ok at idle? sounds like it might be a little low but? what cause low oil pressure?
How many miles?
On higher mileage engines indicative of increased clearances on the crank journals bleeding off pressure.
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Old Mar 17, 2009 | 08:59 PM
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supposedly 94k
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Old Mar 17, 2009 | 09:28 PM
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Old time rule of thumb: 10 PSI for each 1000 RPM.
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Old Mar 18, 2009 | 04:09 PM
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Originally Posted by Muffin
Old time rule of thumb: 10 PSI for each 1000 RPM.
If I was only getting 20psi at 65 mph I would be worried as he**
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Old Mar 18, 2009 | 05:52 PM
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Originally Posted by markKlein
If I was only getting 20psi at 65 mph I would be worried as he**

Why?
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