[Healeys] 100 engine question

[warthodson at aol.com]

My 100 engine was disassembled when I purchased the car.
I am about to begin the rebuilding of a BN-1 engine, so I have been taking stock of what I have & what I need. This invariably leads to surprises & questions. 
I have been told that the 100 dipstick is intended to be pushed in until the end of the dipstick hits the bottom of the oil pan. I assume this is true because the dipstick does not have any "stop" build into it. 
I discovered that I have (2) dipsticks as follows:
1.  2.5" from tip to "Max" mark. Overall length 18"
2.  3.1875" from tip to "Max" mark. overall length 19"  
Did the 100 have different depth oil pans? Are either of these dipsticks correct 100 dipsticks?
 
On a related question, at a recent club meeting a member stated that his mechanic said the reason 100 engines leak oil is because when they are filled to the "Max" mark the level of oil in the pan will be above the "rear seal" (I assume he meant the factory Archimedes screw type seal) & therefore the oil will leak out until the level is below the bottom of the rear seal. Is there any truth to this? 
 
Gary Hodson
 
 

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