Will the oil drain back through the oil pump?  Is this something I
>
> should be concerned about?
>
> Bob W.
>
> 
>
> Bob;
>
> 
>
> I would say "No".  For the oil to drain out air would have to go in.  Where
> would that come from?  I don't know your plumbing, but it would have to come
> all the way back from the ports in the engine, presumably through the oil
> filter.  Not likely. 
>
> 
>
> Al G
>
> 
Thanks Al,

That seems reasonable.  The remote oil filter is uphill from the oil
cooler, then down to the rear oil inlet port on the engine.

Bob W.

Eventually most of the oil will return to the sump. It just takes a long time.

 

It is not common to have both inlet and outlet on the bottom of the cooler. At low flow rates foam will collect in the top cross tubes. Then at high flow rates the foam will be moved along the system to a less

helpfull location. In and out at the top of the cooler is more common. Or if the cooler is vertical, in at the bottom and out at the top.

 

Lynn E. Hanover