[DeTomaso] dry sump system

[Paul Timko]

Whether the oil in the reservoir drains back into the pan depends on the 
location of the reservoir, the routing of the lines and how well the 
pump seals oil seeping back through it.

In general your pump has a couple of suction stages that pull oil out of 
the pan and pump it into the top of the reservoir.  A good reservoir 
should de-aerate the oil as it is pulled to the bottom of the reservoir. 
    The pump also has a pressure stage that pulls oil from the bottom of 
the reservoir and pumps through the oil filter and into the engine.  The 
oil then ends up in the pan to be sucked up by the pump.

Also the traditional dry sump pan is very small and has little clearance 
from the crank.  Most of the oil should be in reservoir, not in the pan. 
  The fact that drained 8 quarts from the pan suggests to me that your 
pan is not a standard dry sump pan (otherwise the oil would fill up past 
the top of the crank and make it very difficult to start the car).  So 
while I've described a standard dry sump, it may not apply to yours.


Here's a link with pictures and a description.
http://www.razorperformance.com/info.htm

Paul
#9270

hoppe1 wrote:
> I bought a car with at dry sump system.  This is my first experience with a dry sump.
> Today I was replacing the oil lines since they are of an unknown age.
> My question is does the oil sitting in the reservoir bleed into the engine when it sits for a while?  
> I drained the reservoir which was not full and then when I removed the oil scavage lines from the engine oil pan I drained probably 8 quarts of oil out of the engine.   Is is suppose to do this?  Not what I thought a dry sump would do.
> 
> Anyone have dry sump experience?
> 
> thanks Rich
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