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Old 09-19-2018, 09:32 AM
Dan Langhout's Avatar
Dan Langhout Dan Langhout is offline
 
Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 456
Default Measuring Crankcase Pressure

What are folks using to substitute for the oil filler cap/dipstick when installing a pressure measuring tap to measure crankcase pressure? As much as I have searched, I can't seem to find any definitive information on the thread size. I'd like to find some sort of threaded metal or plastic cap that fits the filler tube that I could then drill and tap for a tube fitting to connect to my digital manometer.
Any ideas?
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RV-7 N528DP slow build
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  #2  
Old 09-19-2018, 10:13 AM
RVDan RVDan is offline
 
Join Date: Jun 2012
Location: Frederick, MD
Posts: 569
Default

Can't help on the tread info, but why not use one of the existing pipe threaded ports on the accessory housing that just go into the crankcase volume?
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  #3  
Old 09-19-2018, 10:16 AM
Alan Bumbaugh Alan Bumbaugh is offline
 
Join Date: Mar 2010
Location: Lubbock, Texas
Posts: 6
Default Dip Stick Threads

Dan,
I just measured mine and both appear to be 1-1/8 O.D. X 12 inch pitch. The cap with the dip stick major diameter is smaller.
Alan
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