I'm piecing together a custom oil pan for a 20B engine, and am trying to
figure out where to put a dipstick.

The stock dipstick lands toward the "shallow" (forward) end of the pan, and
won't do the trick on a sloping bottom intended for a nose up (tail-dragger)
attitude.  anybody put in a dipstick near the back ("front" cover) end of
the engine?  Probably applies to both 12B and 20B engines, though in the
longer 20Bs the problem is aggravated.

Tom Kendall

Tom;

 

I have a similar situation.  If I can get the dipstick to go down about another inch it will reach to the bottom of the shallow part of the oil pan.  I'm going to heat it, and try to slide the hard rubber seal support a littel further up the rod, or add an extension.

 

Still, it will only measure the first 2 quarts or so of the 8 qt capacity that I have.  I have a warning level switch when there is about 2 1/2 quarts left. Maybe this is adequate - I haven't decided yet.

 

Two possible options are to install a sight glass on the side of the pan at the deep part of the sump, and make some provision to see it.  The other is the install a tube on the bottom of the pan into which an extended dip stick will go, and the tube connects to the deep part of the sump.  Either would work; both involve added potential leak points.

 

Al Gietzen