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From: Charlie and Tupper England <cengland@netdoor.com>
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Subject: Re: [FlyRotary] Re: Dipstick options?
References: <list-1913089@logan.com>
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Al Gietzen wrote:
> Subject: [FlyRotary] Dipstick options?
> 
> 
>     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
> 

FWIW, don't most automotive dipsticks only indicate the top 2 quarts?

full
add (1 qt low)
bottom of stick (about the same linear distance below the 'add' mark)

If the oil level is more than 2 qts low, you can add a qt & recheck. Of course, 
there might be other problems if it's gotten that low.

Charlie England