Oldsmobile Factory Engine Bore/Piston Tolerance
April 9th, 2021, 12:08 PM
#1
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Oldsmobile Factory Engine Bore/Piston Tolerance
TIME MARK: 18:41 on the video
This is phenomenal for 1951.
Oldsmobile engines were bored & held w/in 0.000250" (as read & validated by a high pressure gauge spindle)
The exact size of each bore was recorded in the block itself (I assume that is a die-cast stamp the gentleman is rotating & stamping each bore?)
Various sized pistons were matched to bore size and placed in line so each piston was placed in the correct order of assembly in the block - that's phenomenal workmanship!
Finally, that volumetric sounding device which measures volume of each combustion chamber is absolutely state-of-the-art.
This is phenomenal for 1951.
Oldsmobile engines were bored & held w/in 0.000250" (as read & validated by a high pressure gauge spindle)
The exact size of each bore was recorded in the block itself (I assume that is a die-cast stamp the gentleman is rotating & stamping each bore?)
Various sized pistons were matched to bore size and placed in line so each piston was placed in the correct order of assembly in the block - that's phenomenal workmanship!
Finally, that volumetric sounding device which measures volume of each combustion chamber is absolutely state-of-the-art.
April 9th, 2021, 03:02 PM
#2
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Join Date: Mar 2010
Location: Toronto Canada
Posts: 184
TIME MARK: 18:41 on the video
This is phenomenal for 1951.
Oldsmobile engines were bored & held w/in 0.000250" (as read & validated by a high pressure gauge spindle)
The exact size of each bore was recorded in the block itself (I assume that is a die-cast stamp the gentleman is rotating & stamping each bore?)
Various sized pistons were matched to bore size and placed in line so each piston was placed in the correct order of assembly in the block - that's phenomenal workmanship!
Finally, that volumetric sounding device which measures volume of each combustion chamber is absolutely state-of-the-art.
https://youtu.be/ctWmHFvOyYE?t=1121
This is phenomenal for 1951.
Oldsmobile engines were bored & held w/in 0.000250" (as read & validated by a high pressure gauge spindle)
The exact size of each bore was recorded in the block itself (I assume that is a die-cast stamp the gentleman is rotating & stamping each bore?)
Various sized pistons were matched to bore size and placed in line so each piston was placed in the correct order of assembly in the block - that's phenomenal workmanship!
Finally, that volumetric sounding device which measures volume of each combustion chamber is absolutely state-of-the-art.
https://youtu.be/ctWmHFvOyYE?t=1121
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