Help! Anybody got an extra one of these? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Orence1 · 09-07-2002, 12:25 PM

I need this special bolt. It goes through the bottom hole in an alternator on a BB with a long water pump. Large end with the nut screws into the head and small end goes through the lower bracket with a nut to tighten it up. Can not only not find one around here but nobody seems to know what I am talking about. If you have one and are willing to sell it, please let me know.
Thanks,
Larry

68C10 · 09-07-2002, 04:01 PM

Looks like a dealer item to me. I have seen a similar bolt on I-6's that is used to brace the power steering pump.

Gene · 09-07-2002, 04:35 PM

Looks like a standard 3/8 rod with threads on both ends and a nut threaded on? If you cannot find one, take your dimensions to a machine shop and they can whip you one out for around 20 bucks, they can thread as much as you need on both ends, I have had to have this done before on wierd bolts.

Orence1 · 09-07-2002, 04:56 PM

Have checked with the dealer and it was discontinued in 1992. I will get it made if necessary but am still hoping that one of you guys has one laying around.
Larry

Capitol68 · 09-07-2002, 05:34 PM

Hey there,
Yea it is special from what i can see. Looks like it was made from a piece of hex stock( ie. nut shape ). And with a 3/8-16 on short end with 3/8-24 on the other. Or 5/16-18 and 5/16-24 , hard to tell with no references. Questions or comments u can PM me.
Mark

slam33 · 09-07-2002, 05:39 PM

check a local hardware store that carrys studs like Dorman. You should be able to find one that works

Capitol68 · 09-07-2002, 05:41 PM

ps
it is not rod with a nut screwed on, if u look at picture the nut end the threads do not go all the way to the nut. Hence hex stock.
If u have to have one made take a pic to the shop and a screw that u know goes in the head. The other end can be what ever u want.
later

Orence1 · 09-07-2002, 11:41 PM

What I didn't mention is that one end (engine head end) is one size larger than the other end which tightens the alternator to the lower bracket. One of the things that I am learning is that a lot of these odd parts for our trucks are just not very available any more. I have learned that this part is probably for a BB with a long water pump. I did do some junk yard hopping today. One place had no clue and the other would sell me one as long as I bought the brackets and pulleys for $150! Hope one of you guys can help me out.
Larry

*Fast68Chevy* · 09-08-2002, 06:42 PM

would one on a 72 trruck 402 be the same ? its short pump setup, i removed brackets off one such engine and dont remember whewre hardware went, its probably tossed who kows where around this building by now.

email me length from the backside of the hex, to the end of the stud(long end)

is it 3/8 diameter mainly and short end 7/16" or vice versa ?

fastr68@yahoo.com

thanks

mikep · 09-08-2002, 06:47 PM

here is a slightly enhanced copy of your picture for better detail on the threads.

Having worked in machine shops before I'd have to say that having a one off made is going to cost more than $20 for that sort of piece/ The problem being the hex head. They could cut it out of hex stock but the heat treating necessary after machining that deep is going to cost you. a better option migh be to bore a short 7/16" bolt and tap it 3/8 coarse and screw a long 3/8 stud into it with permanent loctite. That way you could use a decent grade of bolts instead of the crap that usually passes for hex stock.

I'd be willing to make one for you on the lathe if you cant find another if you want to send me a piece of hex stock and pay for shipping.

*Fast68Chevy* · 09-08-2002, 07:10 PM

damn, thats a good enhancement there!
7/16" short end and 3/8" long end, i can see that plain as day now lol! nice!

ill see if i can dig up the one i remoced from the 402, i have no idea how spoon that coud be, maybe tonight or maybe in an hour, dunno, am cutting up truck chassis right now and scrapping parts

mikep · 09-08-2002, 07:25 PM

If Fast68chevy cant find one I have a whole pot full of thread repair sleeves that you can use to make a stud out of. Theyr'e kind of like helicoils except they dont suck. Its just a threaded sleeve with 7/16 thread on the outside and 3/8 threads on the inside. All you'd have to do is screw one onto a much easier to find 3/8" threaded stud and then tighten a nut onto it to lock it in place. Pay the shipping or just drive over from Seattle and its yours. Once installed you'd never know the difference. Heres a pic of one using a bolt just to give you an idea of what I am talking about. I use those thread repair sleeves for a lot of stuff the makers never intended.

09-07-2002, 12:25 PM	#1
Orence1 Registered User Join Date: Jan 2000 Location: Bothell, WA Posts: 548	Help! Anybody got an extra one of these? I need this special bolt. It goes through the bottom hole in an alternator on a BB with a long water pump. Large end with the nut screws into the head and small end goes through the lower bracket with a nut to tighten it up. Can not only not find one around here but nobody seems to know what I am talking about. If you have one and are willing to sell it, please let me know. Thanks, Larry Attached Images

09-07-2002, 04:01 PM	#2
68C10 Registered User Join Date: Dec 1999 Location: Central New Jersey, USA Posts: 328	Looks like a dealer item to me. I have seen a similar bolt on I-6's that is used to brace the power steering pump. __________________ 68C10 1968 C10 SWB No Options but 40K original miles 1967 K20 LWB 283 4-speed South Plainfield, NJ

09-07-2002, 04:35 PM	#3
Gene Registered User Join Date: Aug 2002 Location: Muskogee, Oklahoma Posts: 2,914	Looks like a standard 3/8 rod with threads on both ends and a nut threaded on? If you cannot find one, take your dimensions to a machine shop and they can whip you one out for around 20 bucks, they can thread as much as you need on both ends, I have had to have this done before on wierd bolts. __________________ 1971 SWB 4X4 Build BOARD MEMBER #5448 BOOMER SOONER!!!!

09-07-2002, 05:34 PM	#5
Capitol68 Registered User Join Date: Sep 2002 Location: Austin,Tx Posts: 327	Hey there, Yea it is special from what i can see. Looks like it was made from a piece of hex stock( ie. nut shape ). And with a 3/8-16 on short end with 3/8-24 on the other. Or 5/16-18 and 5/16-24 , hard to tell with no references. Questions or comments u can PM me. Mark __________________ '68 Fleet LWB orig 307 .030 over GM Hei/w Accel Super coil orig. stock TH 400. _______________________ “What we do for ourselves dies with us. What we do for others and the world remains and is immortal.” Albert Pine English author d.1851

09-07-2002, 05:39 PM	#6
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	check a local hardware store that carrys studs like Dorman. You should be able to find one that works __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>

09-07-2002, 04:56 PM	#4
Orence1 Registered User Join Date: Jan 2000 Location: Bothell, WA Posts: 548	Have checked with the dealer and it was discontinued in 1992. I will get it made if necessary but am still hoping that one of you guys has one laying around. Larry

09-07-2002, 05:41 PM	#7
Capitol68 Registered User Join Date: Sep 2002 Location: Austin,Tx Posts: 327	ps it is not rod with a nut screwed on, if u look at picture the nut end the threads do not go all the way to the nut. Hence hex stock. If u have to have one made take a pic to the shop and a screw that u know goes in the head. The other end can be what ever u want. later __________________ '68 Fleet LWB orig 307 .030 over GM Hei/w Accel Super coil orig. stock TH 400. _______________________ “What we do for ourselves dies with us. What we do for others and the world remains and is immortal.” Albert Pine English author d.1851

09-07-2002, 11:41 PM	#8
Orence1 Registered User Join Date: Jan 2000 Location: Bothell, WA Posts: 548	What I didn't mention is that one end (engine head end) is one size larger than the other end which tightens the alternator to the lower bracket. One of the things that I am learning is that a lot of these odd parts for our trucks are just not very available any more. I have learned that this part is probably for a BB with a long water pump. I did do some junk yard hopping today. One place had no clue and the other would sell me one as long as I bought the brackets and pulleys for $150! Hope one of you guys can help me out. Larry Last edited by Orence1; 09-07-2002 at 11:46 PM.

09-08-2002, 06:42 PM	#9
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	would one on a 72 trruck 402 be the same ? its short pump setup, i removed brackets off one such engine and dont remember whewre hardware went, its probably tossed who kows where around this building by now. email me length from the backside of the hex, to the end of the stud(long end) is it 3/8 diameter mainly and short end 7/16" or vice versa ? fastr68@yahoo.com thanks

09-08-2002, 06:47 PM	#10
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	here is a slightly enhanced copy of your picture for better detail on the threads. Having worked in machine shops before I'd have to say that having a one off made is going to cost more than $20 for that sort of piece/ The problem being the hex head. They could cut it out of hex stock but the heat treating necessary after machining that deep is going to cost you. a better option migh be to bore a short 7/16" bolt and tap it 3/8 coarse and screw a long 3/8 stud into it with permanent loctite. That way you could use a decent grade of bolts instead of the crap that usually passes for hex stock. I'd be willing to make one for you on the lathe if you cant find another if you want to send me a piece of hex stock and pay for shipping. Attached Images __________________ No truck :-( Last edited by mikep; 09-08-2002 at 06:57 PM.

09-08-2002, 07:10 PM	#11
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	damn, thats a good enhancement there! 7/16" short end and 3/8" long end, i can see that plain as day now lol! nice! ill see if i can dig up the one i remoced from the 402, i have no idea how spoon that coud be, maybe tonight or maybe in an hour, dunno, am cutting up truck chassis right now and scrapping parts

09-08-2002, 07:25 PM	#12
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	If Fast68chevy cant find one I have a whole pot full of thread repair sleeves that you can use to make a stud out of. Theyr'e kind of like helicoils except they dont suck. Its just a threaded sleeve with 7/16 thread on the outside and 3/8 threads on the inside. All you'd have to do is screw one onto a much easier to find 3/8" threaded stud and then tighten a nut onto it to lock it in place. Pay the shipping or just drive over from Seattle and its yours. Once installed you'd never know the difference. Heres a pic of one using a bolt just to give you an idea of what I am talking about. I use those thread repair sleeves for a lot of stuff the makers never intended. Attached Images __________________ No truck :-( Last edited by mikep; 09-08-2002 at 07:32 PM.



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