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| | | | Joined: Jul 2018 Posts: 80 Shop Shark | | Shop Shark Joined: Jul 2018 Posts: 80 | hi,
i'm working on a 1951 3100 panel with a 1957 235 4 spd.
when the motor was rebuilt, the rebuilder tapped the crank and added a big [censored] bolt and washer to help secure the harmonic balancer. i need the low clearance water pump and the fan is now hitting the balancer bolt.
my understanding is that the harmonic balancer is pressed on and this bolt was added as a back up should the balancer come loose. so do i even need this bolt?
if i do need it, i only have 2" of clearance between the water pump and the rad. is there a electric fan that i can use? if so, can it be mounted in front of the rad?
thanks. | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | Use a flat-head Allen bolt with a tapered head in the crankshaft and taper the hole in the washer. It will eliminate the bolt head sticking out. A better fix is to use Pre-68 Dave's water pump relocation plate that adapts the 216-style water pump to the later engine, raises the fan about 3 inches, and also centers the fan on the radiator for proper cooling. Electric fans are a solution to a nonexistent problem when the right fix is simple, easy, and much more effective.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Apr 2002 Posts: 2,168 A teacher, but always an apprentice. | | A teacher, but always an apprentice. Joined: Apr 2002 Posts: 2,168 | I have Dave’s adaptor plate on my 261 in my 50 AD and it works. Stock rad, alternator setup, 216 pump. It was easy. I second Jerry’s advice.
Last edited by Fox; 02/03/2019 4:51 AM.
| | | | | Joined: Jan 2013 Posts: 1,518 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,518 | I am another happy camper with Dave's water pump adapter plate
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
| | | | | Joined: Jul 2018 Posts: 80 Shop Shark | | Shop Shark Joined: Jul 2018 Posts: 80 | thanks guys, i'm trying to find dave's i know of a deve's that makes a PCV kit. is that the same guy?
if not, do you have a link?
if that moves the fan enough to insert the bolt, great but...if it dosen't, do i need to figure a way to make it work like jerry suggested or can i live without it?
thanks | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | His Stovebolt handle is Pre68Dave. Not the same guy as deve.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
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| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: May 2005 Posts: 281 'Bolter | | 'Bolter Joined: May 2005 Posts: 281 | do i need to figure a way to make it work like jerry suggested or can i live without it? Your builder installed the bolt for a reason. I had a pressed on balancer come off at high rpm once, it was not pretty. Can you picture a balancer shaped hole in the side of an early corvette? Use Jerry's suggestion. | | |
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