Make sure tube does not have a crack or hole that is causing the leak. If so, replace tube. If tube checks out ok, and leak appears at base of tube, remove tube. Using a dremel tool, careful not to penetrate all the way thru, make a shallow groove completely around the bottom of the tube. Clean groove of any debris, remove any sharp edges or burs. Then position a smaller diameter O-ring in the groove. Replace dipstick, check for leaks.
Thru dipstick tube
The dipstick can rust if the pcv sytem is not working properly.
driver's side, through the block.
Older engines have the dipstick on the driver's side. There is a hole in the side of the block between 5 & 7. Newer ones have the dipstick tube in the passenger side of the oil pan.
It sits in a tube sticking out of the left side of the block between #5 & #7 cylinders.
Most often, the length is 24 inches. I have seen some that are 27 inches though.
That depends on where the oil leak is, is it in the motor self or is one of the seals leaking?
You either need a head gasket or intake gasket.
the left side behind the air hose to the air intake housing
Excessive internal engine wear (bad rings)
it should go in threw the head on the driver side but some go in threw the block on the passenger side
Chevy 350's can ussually hit around 6,000 rpms but that's pushing it, youd be better off sticking around 5,500