Oil pressure at cranking speed on a rebuilt engine

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Northstar Engines and System Technical Discussion Discussion, Oil pressure at cranking speed on a rebuilt engine in Cadillac Engine Discussion; Just thought someone might like to know the results - because of what just happened to an engine that my ...
  1. #1
    97EldoCoupe's Avatar
    97EldoCoupe is offline Owner of Northstar Performance
    Automobile(s): 97 ETC x2, 04 GXP, 04 STS x2, 97 ESC, 99 Deville, 05 SRX
    Join Date
    Mar 2007
    The Great White North

    Oil pressure at cranking speed on a rebuilt engine

    Just thought someone might like to know the results - because of what just happened to an engine that my crew and I put a lot of work into, I decided to do my best to eliminate the possibility of that ever happening again.

    Oil pressure test at cranking speed with spark plugs out (no idea what the battery voltage was but it was spinning a decent rate) = hitting 60-70 PSI.

    From now on if I ship an engine out, until I finish that test stand, the engines will at least be shipped with the whole oil system primed. But the system must STILL BE PRIMED before start-up, and the engines will still be shipped dry, no oil in the pan.

    60-70 PSI is normal for a Northstar when cold.


  2. Remove Advertisements

  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: Oil pressure at cranking speed on a rebuilt engine

    Jake - Yeah that. A trick I use on marine engines that sit for long periods is to roll the engine over without choking until oil pressure comes up - that makes sure all the bearings have lube before the engine fires. My Olds marine engines will roll over with plugs installed and easily get 40 psi from a stock Melling pump before they start.

    ...............hard to roll an electronic engine over though - it starts instantly. Your test is good insurance against the occasional yahoo that starts an engine dry.....

    Have you ever seen a pre-lube setup ?? A pressure flask, solenoid, and piping to the oil pump discharge (usually off the gauge Tee) : the engine runs normally, the flask charges with pressurized oil and a solenoid operated check valve retains the pressurized oil (half quart) when you shut down. A week later you stick the key in the ignition and turn it ON. The solenoid trips, the flask dumps into the pump discharge, and pressurized oil squirts throughout the engine before it starts. The cycle repeats. We use 'em all the time on big marine diesels. I think some of Dkoz' aircraft engines use a similar arrangement.

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts