Re: Pros and Cons to using oil as coolant

Posted by Cedric on May 12, 2007 at 04:19:56 from (210.54.114.226):

In Reply to: Pros and Cons to using oil as coolant posted by JohnG(TX) on May 11, 2007 at 08:44:16:

Just as a matter of interest, large marine Diesel engines use oil to cool the piston heads which are hollow for the oil to circulate through. As they are crosshead type engines it is relatively easy to set up pipe arrangements to get the oil into and out of the pistons.
Smaller, medium sized engines with trunk pistons often cool the underside of the piston crown with oil sprayed from the top of the con. rod. A hole is drilled through the centre of the rod allowing excess oil from the con. rod bearing to travel up the rod, around the piston pin and spray out of the hole at the top of the rod.
These engines always have oil coolers.

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