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Unread 06-18-2013, 01:53 PM   #1
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1992 YJ Wrangler 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 547
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.

1992 YJ 2.5L
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
Other:LED Tails and Herculined
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Unread 06-18-2013, 01:57 PM   #2
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1989 YJ Wrangler 
Join Date: Nov 2010
Location: Sin City, Nevada
Posts: 2,881
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.
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

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Unread 06-18-2013, 02:04 PM   #3
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2003 TJ Wrangler 
Join Date: Jun 2003
Location: Warrensburg, MO
Posts: 4,163
Typically 13-15 @ idle then 10psi/1000rpm is min spec (as read from a mechanical gauge).
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