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#1 |
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![]() Join Date: Dec 2010
Location: Sacramento, CA
Posts: 151
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HELP !!!! '72 BBC Alternator Issue Mystery
OK, here is by dilemma (pulling my hair out) I am assembling my 402 to install in my '72 C-20 truck. I have the correct, GM original alternator brackets and I purchased the right alternator for my truck and when I put it all together the rear support rod that bolts to the exhaust manifold doesn't reach !
It's about 3/4" short - what am I doing wrong or missing ??? HELP !!!!!!
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#2 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,287
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
I’m pretty sure bolts to the head not the manifold.
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#3 |
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Location: Sacramento, CA
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I thought of that as well but there are no open holes above the exhaust manifold that the rod could reach. I have looked at pictures but none I’ve been able to find are clear enough to see where it bolts to !
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#4 |
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Location: Sacramento, CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Maybe some one can post a clear picture of the whole assembly on the engine.
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#5 |
Account Suspended
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Location: Tacoma, WA
Posts: 6,873
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
This brace bolts behind the alternator, bolt through brace then into alternator.
Ive seen it bolted to front of alternator. |
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#6 |
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Location: Tacoma, WA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Post 11 here has a picture.
http://67-72chevytrucks.com/vboard/s...d.php?t=760308 Think the head bolt hole is above and to the rear of the 2nd exhaust manifold bolt from the front. |
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#7 |
Registered User
![]() Join Date: Dec 2010
Location: Sacramento, CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Hi Randy, Thanks, I know it bolts to the back/behind part of the alternator. I have been able to confirm this looking at various pictures. It's the rod that bolts to the back of this bracket that is driving me crazy !
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#8 |
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Location: Tacoma, WA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
If that picture in the thread doesn't clear it up then i can move some stuff and lower my truck from the lift....
Have a mod move this thread to the message forum. |
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#9 |
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Location: Sacramento, CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Randy, I have that picture saved but it doesn't help when it comes to where that rod connects to the engine - I really need to see where it bolts to on the engine.
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#10 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Try this.
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#11 |
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Thanks Uncle, can you send a link to the picture - it's exactly what I need but too blurry to see the detail. Thanks !!!
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#12 |
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Location: burlington north carolina
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
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#13 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
I googled 72 truck 402 through the board,then went to images. Not too far down in the images. Not too computer savvy. Maybe you can find it this way.
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#14 |
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Location: Sacramento, CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Thanks Anew - You are right !!, I'm running an earlier set of heads that doesn't have this hole/boss on the head - MYSTERY SOLVED !!. Luckily I was rummaging through one of my cans of bolts and found a small bracket that I can bolt on the exhaust manifold that should work just fine to connect the rod at the right location and height. Thanks to all who contributed - no more hair pulling.
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#15 |
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Location: Sacramento, CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Thanks, found it and Anew4961 was right - my heads are different. Thanks again for your help.
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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#16 |
Senior Member
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Location: Monrovia CA
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
If your interested in selling that rod I lost mine. I think I finger tightened it and forgot to snug it up. Thanks, Tom
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#17 |
Registered User
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Location: Sacramento, CA
Posts: 151
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Re: HELP !!!! '72 BBC Alternator Issue Mystery
Hi Tom, no, now that I've solved the mystery I'm going to need it to put it together. I'm sure someone out here has a spare.
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70 Chevy C20 CST 350 A/C 72 Chevy Custom Camper 402/ 400 A/C 73 Pontiac Trans Am 455 07 Corvette Z51 LS2 ![]() |
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