View single post by John Finch
 Posted: 05-28-2006 11:17 pm
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John Finch


Joined: 08-01-2005
Location: Minneapolis MN
Posts: 120
Not quite sure of the meaning of your question but here goes. When the oil gets hot (warm engine) it thins out loosing its viscosity and the oil pressure drops as a result. When you start cold its thicker and you have higher oil pressure.  18309 starts at about 75psi at idle, after running and it gets really hot it will drop to about 35 at idle.  My temp gauge is just to the right of center when the back of the thermostat housing is at 180 degrees fahrenheit. The JH manual says 60psi oil at 2500 rpm is normal. I've got about 75 at 2500 if the gauge is accurate. Not sure if this answeres your question. Hope it helps. John