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06-07-2015, 07:54 PM
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#1 |
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Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
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BBC Crank Pulley in Steel like original - source?
The crank pulley fell off my 454 C20 for the second time. Two bolts worked loose and spun the crank off - cracked the pulley. I have tried an aluminum replacement when the first one broke, but the v belts would never stay tightened. I found a used OEM steel pulley, but now I need a second one.
Does anyone know of a source for a steel pulley? Should loctite be used on these bolts? If so, what kind? Also, any recommendation on replacements bolts? ( I only have one left.  )Part number stamped on part is 3937787-AC. It is a 3 groove pulley - about 7 3/4" diamater and 2 3/4" bolt pattern. Thanks. |
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06-08-2015, 10:33 PM
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#2 |
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Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Re: BBC Crank Pulley in Steel like original - source?
The inner groove of the 3 is smaller in diameter right?
__________________
70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634 |
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06-09-2015, 10:33 AM
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#3 |
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Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
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Re: BBC Crank Pulley in Steel like original - source?
First groove is large, second two are equally smaller.
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06-09-2015, 11:35 AM
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#4 |
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yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,826
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Re: BBC Crank Pulley in Steel like original - source?
Alan Grove sells them
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Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale |
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