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02-19-2008, 11:11 AM
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#1 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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serpentine bracket bolt holes
I am installing serpentine brackets from, I believe, an early 90's camaro on a sbc with Protopline heads. In the highlighted area in the image below, you can see the how the top right bolt hole in the bracket misses the bolt hole in the head. Is this a common problem? Did I get the wrong brackets? Should I just drill a new hole and tap it?
Last edited by Alex Hayley; 02-19-2008 at 11:19 AM. |
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02-19-2008, 11:47 AM
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#2 | |
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Long Fleet Club
Join Date: Aug 2006
Location: Deer Park, TX
Posts: 5,666
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Re: serpentine bracket bolt holes
Quote:
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Chris Meeks '69 Chevy Custom/10 Long Bed <-- Thread of the work I did before selling. Truck is now finished to the new owners design and running around. I was shown some pictures of the finished product. At least it survived the junk yard. FAQ Index by Krue Site Vendors Subscribe Here Forum Rules |
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02-19-2008, 12:10 PM
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#3 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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Re: serpentine bracket bolt holes
They are like stock. They are heads originally out of Australia and NZ and later brought to the States. The driver's side bracket mounts just fine. The passenger side bracket has a different mounting pattern that does not match with the two bolt patterns on the heads.
Last edited by Alex Hayley; 02-19-2008 at 09:02 PM. |
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02-20-2008, 03:34 AM
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#4 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,746
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Re: serpentine bracket bolt holes
At least you have a hole on that side most older heads don't have accessory hole on the P/S. Don't worry about it, just put all the other braces on and you will be fine. I've been running my like that for a few years with no problems as have quite a few others on here.
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 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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02-20-2008, 03:52 AM
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#5 |
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knuckle buster..
 
Join Date: Oct 2007
Location: Frisco
Posts: 613
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Re: serpentine bracket bolt holes
 so let me get this right........ eh hem..... you've got a hole in your head......... and it is useless............. and..... you want to drill another one...........  and hope that one will help?.......  just kidding!!! lol i had that problem on an old camaro i had, didnt have the extra hole and didnt care..... no probs!!!!!!!!!!! hope you dont still want another hole in your head! lol!
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02-20-2008, 04:57 AM
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#6 |
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Registered User
Join Date: Mar 2003
Location: Cheboygan, MI
Posts: 998
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Re: serpentine bracket bolt holes
looks like you've got a lot of bracket there. Maybe there's a hole in the head that will work if you drill another hole location in the bracket...
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Tony Johnson -- '71 Blazer w/L-31 Vortec 350, SM465, NP205, performer intake, edelbrock 1406, HEI, 4" lift, Boyd EFI tank, Vintage A/C My Blazer -- |
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02-20-2008, 06:28 AM
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#7 | ||
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,031
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Re: serpentine bracket bolt holes
Quote:
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 02-20-2008 at 06:30 AM. |
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02-20-2008, 09:16 AM
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#8 |
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Senior Member
Join Date: Jan 2002
Location: PORT NECHES, TEXAS / USA
Posts: 1,667
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Re: serpentine bracket bolt holes
Scoti is correct. The heads were not drilled on the older models. I had to drill mine for a old air ac bracketon the 69 i just sold. I just mounted the same setup on a 67 c-10 this weekend. I drilled and tapped the hole 3/8. I drilled it 3/4to 7/8 deep. I wouldn't go much farther than that. Hope this helps.
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02-21-2008, 03:40 AM
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#9 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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Re: serpentine bracket bolt holes
Thanks for all the replies. I drilled a hole in the head(can't have too many holes in the head
 ) and the brackets mount great.
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02-21-2008, 04:04 AM
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#10 | |
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Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: serpentine bracket bolt holes
Quote:
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Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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02-21-2008, 04:04 AM
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#11 |
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Registered User
Join Date: Mar 2003
Location: Cheboygan, MI
Posts: 998
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Re: serpentine bracket bolt holes
Be sure and post pics of the finished project!
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Tony Johnson -- '71 Blazer w/L-31 Vortec 350, SM465, NP205, performer intake, edelbrock 1406, HEI, 4" lift, Boyd EFI tank, Vintage A/C My Blazer -- |
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02-21-2008, 04:33 AM
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#12 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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Re: serpentine bracket bolt holes
A stud...now there is a thought. Does anyone know what the torque should be for the brackets?
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02-21-2008, 06:03 AM
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#13 |
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Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: serpentine bracket bolt holes
Yeah, trucks that originally came with serpentine belts used studs on both brackets (the holes near the waterpump). I used C/K truck brackets while your brackets look like B or F body car brackets….same mounting though.
Below are the torque values for a 1999 L31 5.7L so I would assume these should be pretty close. Bracket Bolt to Engine: 30 ft lbs Bracket Stud to Engine: 15 fl lbs Bracket Stud Nut: 30 ft lbs It sure was scary drilling that hole wasn’t it! I know that I was nervous when I did mine over 10 years ago before the serpentine conversions became so popular.
__________________
Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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02-21-2008, 12:28 PM
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#14 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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Re: serpentine bracket bolt holes
Looking on Summit Racing and came across a pdf that contains directions for installing a serpentine system from GM. Hope it helps someone.
http://static.summitracing.com/globa...l-12497698.pdf |
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02-21-2008, 10:06 PM
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#15 | |
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Registered User
Join Date: Mar 2003
Location: Cheboygan, MI
Posts: 998
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Re: serpentine bracket bolt holes
Quote:
__________________
Tony Johnson -- '71 Blazer w/L-31 Vortec 350, SM465, NP205, performer intake, edelbrock 1406, HEI, 4" lift, Boyd EFI tank, Vintage A/C My Blazer -- |
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