Posted by Bob Bernard on June 20, 1997 at 12:26:30
In Reply to: Re: Rear Engine Seal
posted by Parnell Kelley on June 20, 1997 at 00:41:23
I personnely use the one piece rear main seal which eliminates the oil leak, but I have several friends that have cut off their oil drain tubes and have a noticable improvement.
Try this: get a glass of water and a straw, fill the straw with water and block the opening, with the straw in the glass, release the water from the straw. Now do the same thing with the straw out of the water. Which drains faster?
Older cars used an open crankcase ventilation system that evacuated smells and pressures through the oil breather tube. The pressures were minimal if any. The only exception to this is if the cylinders and rings are worn, which createsblow-by causing excessive pressures.
Newer cars use use a closed vetilation system which evacuates these pressures and smells through the intake, where they are burned in the combustion chamber, and then out the exhaust. Kinda like a vacuum cleaner.
I prefer an exhaust evacuation system similar to the ones used on race cars, because i dont like to burn oil with my gas. But thats another story.
I think the question at hand is the oil leak after the car has been shut off. At this point you want the maximum oil flow back to the pan. Cutting the drain tube down eliminates any obstruction there may be. All you can do is try it and see how well it works for you.