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Unread 06-18-2013, 12:53 PM   #1
TA-YJ
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1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 533
Safe Oil Pressure?

I fired up the "new" engine the other day and the oil pressure has caught my eye. My old engine would go from ~20psi at hot idle to ~60psi on the highway. The one I dropped in goes from ~15psi (Maybe a little lower) to ~45psi on the highway. I swapped the pressure sensor over so I know that is not the issue. I am just wondering if these pressures are safe. Thanks.

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Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
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Unread 06-18-2013, 12:57 PM   #2
jokerchief462
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1989 YJ Wrangler 
 
Join Date: Nov 2010
Location: Sin City, Nevada
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Yes you are good. IIRC the book says 40-75 at high RPMs and 15-40 at idle. Each engine acts differently depending on age and the oil and the temp. Enjoy the engine it should last a long time with care.
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Unread 06-18-2013, 01:04 PM   #3
dillonjm
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2003 TJ Wrangler 
 
Join Date: Jun 2003
Location: Warrensburg, MO
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Typically 13-15 @ idle then 10psi/1000rpm is min spec (as read from a mechanical gauge).
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