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02-01-2015, 10:24 PM
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#1 |
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Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Ac brackets bolt size
I am gathering parts to put the AC back in my truck. I bought some stock brackets that bolt onto the block and I need the bolts to attach them. I picked up a few popular sizes outta the bolt bin at work and none of them worked. The one I tried is on the front of the block by the water pump. Does anyone know what size and length is used. These are for a big block.
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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02-02-2015, 12:48 PM
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#2 |
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Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Ac brackets bolt size
No one?
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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02-02-2015, 12:54 PM
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#3 |
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Registered User
Join Date: Oct 2014
Location: Mesa AZ (Near Phoenix)
Posts: 2,302
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Re: Ac brackets bolt size
You probably already know the thread diameter (more than likely 3/8" N.C.T.) by having removed the original bolt. To know how long a bolt you need I would put the bracket up against the hole and then put a pencil in the hole till it bottoms out. Mark the part of the pencil (or hold your fingernail on it) sticking out. You need a bolt 1/4" less in length than that.
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"Life is too short to drive a boring vehicle". Later, Wayne 
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02-02-2015, 05:30 PM
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#4 |
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Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Ac brackets bolt size
No I do not know the diameter the PO did not have the brackets or bolts. The common size bolts I tried don't fit . I didn't look at the sizes of bolts when I snagged them out of the bolt bin, just got the sizes I thought were close
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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02-02-2015, 07:52 PM
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#5 | |
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Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: Ac brackets bolt size
Quote:
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02-10-2015, 11:19 PM
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#6 |
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Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: Ac brackets bolt size
Well I found my problem the bolt size is 3/8 but the threads on the head are stripped. Is it possible to tap the hole to the next size. The things the PO did just amaze me.
 Any suggestions
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach "Wanda" Don't argue with idiots, People watching may not be able to tell the difference... There's someone in my head........But it's not me...... cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394 Last edited by hdff; 02-11-2015 at 12:11 AM. |
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02-11-2015, 12:21 AM
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#7 |
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Registered User
Join Date: Dec 2014
Location: Sedro Woolley Washington
Posts: 86
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Re: Ac brackets bolt size
I would start with a 3/8" x 16 starter tap. The beginning threads on the tap are tapered enough to get into the good threads. Then you should be able to tap with a #2 or bottom tap to clean them up. If that doesn't work there is plenty of material around the bolt hole to jump to a 7/16" or 1/2". Carefull, don't go any deeper.
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72 Chevy C20 LWB-Just what I always wanted. Now, just need more time and money! |
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