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Engine Specific Info and Questions => IDI Engine => Topic started by: gnavs on May 05, 2011, 11:32:30 pm

Title: Operating oil pressure
Post by: gnavs on May 05, 2011, 11:32:30 pm

I'm nearing completion of my AAZ rebuild and am monitoring my oil pressure.  Seems like I'm getting around 50psi at startup, dropping gradually to around 40psi after a couple minutes.  What's normal operating pressure for these engines?  I've read anywhere from 15-80 psi depending on temperature and oil type.  I'm using 15W40 Lubromoly at the moment.
Thanks.

Title: Re: Operating oil pressure
Post by: zagarus on May 06, 2011, 01:39:14 am

cold startup I see it anywhere from 80-100psi, once oil is warmed up to operating temp it should sit around 22-30psi at idle.  Cruising around you're looking around 40-60psi.

Title: Re: Operating oil pressure
Post by: vako on May 06, 2011, 03:35:45 am

i am getting 8-10 psi  (0.5-0.7 bar) at idle when fully warmed up. but i do not have oil cooler and now im using quite cheap 15w40 mineral oil.    i think that synthetic or semi-sinthetic oil should give me more pressure.    i have that readings at oil filter flange.   i get 60-70 psi at cold startup.

engine AAZ

Title: Re: Operating oil pressure
Post by: theman53 on May 06, 2011, 05:20:10 am

I have the same as zagarus and I am running 5w-40 rotella T6

Title: Re: Operating oil pressure
Post by: nathan_b on May 06, 2011, 06:05:46 am

how are you measuring it? known good mechanical gauge or a vdo guage

Title: Re: Operating oil pressure
Post by: gnavs on May 06, 2011, 08:17:31 am

I picked up an autometer electric pressure gauge on ebay last year and it seems to be working fine.  I trust it more than the army of blinking lights in my cluster  ;D

Title: Re: Operating oil pressure
Post by: vako on May 06, 2011, 12:13:37 pm

and i have tractor mechanical gauge :D  bought for just 6$