OP ---- Dont dispair ---we jus messin wid ya

 

If you really want to know, lookup the oil pump output gals/min, gals/hr. Use this number to divide the total oil volume which is probably 5.5 quarts. I don't remember how many quarts of oils they use in an oil change.

 

Once the engine and oil are hot, the oil is not much thicker than water. It probably circulates the entire crankcase every few seconds.

I used to build bike engines and when the oil was hot, they would suck all the oil out of the crankcase within a couple seconds at idle. I had an oil filter blow off at one point at just over 14,000 rpm. It took all of about 1.5 seconds to empty out the engine of it's 4 quarts. The oil filter was a fram and shortly thereafter they were all recalled because the threads were too shallow - but that's another story.

 

Well, since this thread is not going anywhere... I once ran a 4Runner from mile marker 100 in Key Largo, half way to Homestead, and then half of that distance back, before the engine seized. That's about 30 miles total. No oil circulated through the system, maybe a few drops, because I hooked up the oil cooler backwards (check-valve). I had used Mobil 1 and Slick-50 during the previous oil change, and that may have contributed to delaying the inevitable. Obviously, I did not have a good relationship with those oil drops.

As BrazenZ stated, dividing the crankcase oil volume by the flow rate of the oil pump will yield the length of time it takes to circulate the equivalent of every oil drop around the engine. This isn't really as stupid a question as it sounds. I'm sure it has a place in engine oil filter and cooler design, somewhere, but not in everyday driving.

 

sweet, interesting thoughts/ideas. and yeah, getting a little flamed, no worries.

 

Fine -----But advertised GPM flow is based on non-restrictive. Here, there are plenty of restictions, otherwise you would see 5 PSI at start-up as opposed to 90.

We go back to square one. Nothing has been accomplished here

 

It would take a few mins.DAMAGE to the internals would start at around 35-45 seconds if not sooner.Running a motor with no oil isn't something you can say will seize up in 1 min, 23 seconds.

 

Yea, but I never thought it would take as long as it did either. The scraping noises started 3-4 minutes after startup, I picked up a clunk or knock after about 10 minutes, but by that time, I just wanted to go back home and beat my head against the wall.

 

SHORT note for next time.WHEN OIL pressure drops,turn the engine off ASAP and coast to a stop. CALL a tow truck and have it looked it.Don't worry everyone has done it before.

 

Good thinking... I had plenty of oil pressure. The reversed check valve blocked all oil flow and dead-headed the pump. Consequently, the oil pressure gage showed >60psi, and the oil pressure light never came on. Thanks for the advice though.

 

was about to say the same thing