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1961 Bolt Lengths and types info needed

Started by dbzsjones, January 26, 2025, 01:09:26 PM

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dbzsjones

#20
January 30, 2025, 06:53:21 PM
Quote from: Clewisiii on January 26, 2025, 02:31:18 PMI beleive Flywheel to crank is 7/16 x1/2 20tpi.

20250126_143006.jpg
It always surprises me that there are no lock washers on these bolts.

The Tassie Devil(le)

#21
January 30, 2025, 07:17:01 PM
Quote from: dbzsjones on January 30, 2025, 06:53:21 PMIt always surprises me that there are no lock washers on these bolts.
Other GM brands use lock washers on these bolts.   Not the single turn ones, but the star type.   With the external tangs.

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Clewisiii

#22
January 30, 2025, 07:59:05 PM
Most torque calculation testing finds lock washers do not really work.
"My interest is in the future, because I am going to spend the rest of my life there."  Charles Kettering

Clewisiii

#23
January 31, 2025, 06:25:36 PM
20250131_180206.jpg
"My interest is in the future, because I am going to spend the rest of my life there."  Charles Kettering

Moody

#24
February 04, 2025, 09:48:13 AM
Quote from: The Tassie Devil(le) on January 30, 2025, 07:17:01 PMOther GM brands use lock washers on these bolts.   Not the single turn ones, but the star type.   With the external tangs.

Bruce. >:D

It seems that even a small thin flat washer would be a good idea to keep the flex plate from getting gouged out as it normally does.
Moody

dbzsjones

#25
February 08, 2025, 06:43:52 PM
The new bolt set did come with star washers.  Not sure it hurts anything to use them, but it they didn't use them originally, I'm not sure I should add them. 
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