I need to know what size those 3 (or is it 4?) bolts are that hold the water pump pulley on a 202. They seem to be an odd size and I can't find anything to fit.
Water pump pulley bolt size?
Started by
_Terrible One_
, Oct 26 2006 01:11 PM
21 replies to this topic
#2
_DocDamage_
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Posted 26 October 2006 - 01:18 PM
They are a finer pitch thread than most similar sized bolts out of your holden, and finding replacements in the bolt jar is rare. Sorry can't help on the exact thread but if you have an old bolt or a spare pump lying around just take to a specialist nut, bolt & screw shop and get some.
#3
_devilsadvocate_
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Posted 26 October 2006 - 07:19 PM
Just had one handy in the top of the the tool box.
As best I can measure it: 5/16 in 22 threads per inch, 1/2 in head
Do remember buying another longer/shorter set myself, bolt shop should have no probs with these.....bolts do come in different strength ranges....possibly these come in only the one strong range.
As best I can measure it: 5/16 in 22 threads per inch, 1/2 in head
Do remember buying another longer/shorter set myself, bolt shop should have no probs with these.....bolts do come in different strength ranges....possibly these come in only the one strong range.
Edited by devilsadvocate, 26 October 2006 - 07:23 PM.
#4
J-Rod
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Posted 26 October 2006 - 07:36 PM
5/16" UNF
#5
_devilsadvocate_
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Posted 26 October 2006 - 08:24 PM
That would be right ^, 5/16 UNF has 24 threads per inch
Just been googling to learn more about this stuff: unified national fine and unified national course UNC, I dont think I want to know any more about nuts and bolts!
One thing to keep in mind, one site claims that when referring to UNF or UNC, that when specifying a size in UNF like 1/2in, then you are actually specifying the size of the head of the bolt,(this is standardised 5/16 thread has a 1/2 head), I gather that this is referred to as the AF size(across the flats of the head of the bolt)
I suppose one good reason for this is its actually quite easy to measure the head of the bolt by seeing what size spanner fits without actually having to retract the bolt. Im sure the bolt shop will clarify whether you want that sized thread or head.
Just been googling to learn more about this stuff: unified national fine and unified national course UNC, I dont think I want to know any more about nuts and bolts!
One thing to keep in mind, one site claims that when referring to UNF or UNC, that when specifying a size in UNF like 1/2in, then you are actually specifying the size of the head of the bolt,(this is standardised 5/16 thread has a 1/2 head), I gather that this is referred to as the AF size(across the flats of the head of the bolt)
I suppose one good reason for this is its actually quite easy to measure the head of the bolt by seeing what size spanner fits without actually having to retract the bolt. Im sure the bolt shop will clarify whether you want that sized thread or head.
Edited by devilsadvocate, 26 October 2006 - 08:32 PM.
#6
FastEHHolden
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Posted 26 October 2006 - 08:36 PM
You buy them by the diameter of the bolt (inch) x the length of the bolt (inch)....you are chasing something like 5/16 UNF x 3/4 inch
#7
_micksgtr_
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Posted 26 October 2006 - 09:46 PM
if you walked in my shop and told me you wanted a bolt with a 1/2" i'd tell u where to go. All bolts are diameter X length.
Get some hi-tensile bolts, will most likely be grade 5 for imperial stuff. this is the rockwell hardness of the bolt. or do what i do and get ya self some nice button head cap screws in stainless!!!
cheers
Get some hi-tensile bolts, will most likely be grade 5 for imperial stuff. this is the rockwell hardness of the bolt. or do what i do and get ya self some nice button head cap screws in stainless!!!
cheers
#8
_devilsadvocate_
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Posted 26 October 2006 - 10:05 PM
We really do have some "hard nuts" here dont we, that would be one shop that wouldnt see many customers................obviously a length might be helpful......but i couldnt really help there as this would vary on the application, fan clutch, spacer etc.if you walked in my shop and told me you wanted a bolt with a 1/2" i'd tell u where to go.
Edited by devilsadvocate, 26 October 2006 - 10:06 PM.
#9
_DocDamage_
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Posted 26 October 2006 - 10:48 PM
Yes we do have some hard nuts here, devilsgrammarchecker. But seriously if you went to the parts shop and asked for 3/4" mag wheel nuts for your new wheels he would probably stare blankly back at you, and when you got the right ones your 3/4" wheel brace will probably no longer fit. Spanner size has no relevance to thread.
#10
_devilsadvocate_
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Posted 26 October 2006 - 11:18 PM
Hey guys, dont shoot the messenger.......I was simply passing on what one particular web site pointed out...........and it might be worth considering in the future to avoid any confusion.........is that clear?
You are welcome to point out whether you think that is nonsense in you part of the world, but leave me out of it.
for unf and unc which was the direction in which the thread has turned..........
A unf 3/4 head would be a 1/2 inch thread......not for a torry
if you ordered a unf 5/8 head, you would get a 7/16 thread.
You are welcome to point out whether you think that is nonsense in you part of the world, but leave me out of it.
This site says otherwise: http://www.namrick.co.uk/boltspec.aspSpanner size has no relevance to thread.
for unf and unc which was the direction in which the thread has turned..........
A unf 3/4 head would be a 1/2 inch thread......not for a torry
if you ordered a unf 5/8 head, you would get a 7/16 thread.
Edited by devilsadvocate, 26 October 2006 - 11:29 PM.
#11
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Posted 26 October 2006 - 11:39 PM
Its only done rarely in jest and hopefully in a way that gives people something a little puzzling to think over.........Yes we do have some hard nuts here, devilsgrammarchecker.
#12
_DocDamage_
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Posted 26 October 2006 - 11:47 PM
Not shooting the messenger. I though we were talking about old holdens not old tech standards. I know you source your facts well. And I was just ribbing in the first bit.
#13
_DocDamage_
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Posted 26 October 2006 - 11:52 PM
I don't have a prob with you doing it either.
#14
_micksgtr_
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Posted 27 October 2006 - 02:37 PM
if you were implying that i dont get many customers, how does on average a million dollars a month sound?? and what about in the 80's when holden with to metric, threads were still unc and unf, but bolt head sizes were metric. i wasnt having a go at anyone but not even is as simple as you may want it to be. its the industry which i work in and no, in my world a bolts not just a bolt!!!
cheers
cheers
#15
_devilsadvocate_
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Posted 27 October 2006 - 07:12 PM
.......this is what you said earlieri wasnt having a go at anyone
.......sounds fairly personal to me.if you walked in my shop and told me you wanted a bolt with a 1/2" i'd tell u where to go.
......its nice to share that knowledge with us all, but how does that relate to me bringing up some facts relating to unf and unc bolt(includes head and thread) standards from a website, when we were talking about a 202(not 3.3) water pump pulley BOLT(head and thread) that was unf?and what about in the 80's when holden with to metric, threads were still unc and unf, but bolt head sizes were metric.
......Im a novice when it comes to bolts I agree, but its not rocket science to read the simple facts on unf and unc thread and bolt head sizes.not even is as simple as you may want it to be
Maybe a simple apology would have been more in order.
Just reading back on "Terrible One's" initial post, he(I assume) refers to 3 or 4 bolts, perhaps he is referring to the bolts holding the pump to the engine....its difficult to see how one could miscount or not be able to see all the holes on the pulley flange.
#16
davelh
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Posted 28 October 2006 - 07:32 AM
for bgucks sake, everyone settle down!
and just answer the mans question!
you need 4 x 5/16 UNF bolts (that is the thread diameter, and UNF is the thread count, the ONLY way to ask for a bolt!)
obviously, measure the overall length of the bolt you already have, go down to universal fastners or where ever, and ask for an above mentioned bolt in the length you require - you might as well get four of them.
hope this helps
cheers
dave
and just answer the mans question!
you need 4 x 5/16 UNF bolts (that is the thread diameter, and UNF is the thread count, the ONLY way to ask for a bolt!)
obviously, measure the overall length of the bolt you already have, go down to universal fastners or where ever, and ask for an above mentioned bolt in the length you require - you might as well get four of them.
hope this helps
cheers
dave
#17
_devilsadvocate_
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Posted 28 October 2006 - 12:51 PM
Dave, the question has been answered(in my first reply......possibly any good bolt shop recognising that my count of 22/inch was close to 24/in and combined with 5/16 diameter and 1/2 head it had to be unf and confirmed/clarified by jrod later)........ although understandably for yourself this has been blurred in the responses after that.
Im 99% sure we have interpreted the question correctly.
Dave, I would ask for a bolt as everyone else here would, by specifying the bolt diameter, length and thread count and if necessary specify a size for the head.
Perhaps not was well received, was that I pointed out the a particular website carrying all the standards and specs for all bolts, pointed out that as the head of the bolt and thread sizes were standardised in unf and unc bolts, then it was common for the bolt to be referred by the size of the head(must do it that way somewhere for that to be mentione), or if you could only access the head of unf/c bolt then the thread diameter could be intepreted from that. I thought it might be helpful for people to perhaps store that away as a little tid bit that may come in handy one day, not to change how things are done...................but alas, look what happened.
Im 99% sure we have interpreted the question correctly.
Dave, I would ask for a bolt as everyone else here would, by specifying the bolt diameter, length and thread count and if necessary specify a size for the head.
Perhaps not was well received, was that I pointed out the a particular website carrying all the standards and specs for all bolts, pointed out that as the head of the bolt and thread sizes were standardised in unf and unc bolts, then it was common for the bolt to be referred by the size of the head(must do it that way somewhere for that to be mentione), or if you could only access the head of unf/c bolt then the thread diameter could be intepreted from that. I thought it might be helpful for people to perhaps store that away as a little tid bit that may come in handy one day, not to change how things are done...................but alas, look what happened.
Edited by devilsadvocate, 28 October 2006 - 01:05 PM.
#18
rodomo
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Posted 28 October 2006 - 01:40 PM
Is this a thread thread? 
Maybe I should bolt before I drive someone nuts
Maybe I should bolt before I drive someone nuts
#19
_micksgtr_
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Posted 28 October 2006 - 08:26 PM
its not personal mate, in the end people may or may have not found out somehting new so give it a rest. I work in a cut throat industry, i wouldnt for a second tell a bloke where to go for telling me what size spanner he uses. it was more or less trying to point out a fact that the looking at some website is not the real world, walking into your local parts store and picking up a champion pack of over priced zince plate high tensile bolts is the easy way out and will only hurt your back pocket. i've offered many people on here, and in fact given, yes thats given free, over $200 worth of bolts and nuts and washer and threaded rod to people on this forum. if i said something the qworng way i'm sorry if i offended. but in the end my info is there for people to learn from and i also to learn plenty from
sorry if i offened, hope i can continue to help others. i work for a engineering and industrial supply company. if i can offer anything help for high tensile stainless or z/p bolts or nits or washed or any tooling please let me no.
hope this will settle people down and help us all out
cheers
sorry if i offened, hope i can continue to help others. i work for a engineering and industrial supply company. if i can offer anything help for high tensile stainless or z/p bolts or nits or washed or any tooling please let me no.
hope this will settle people down and help us all out
cheers
#20
arrimar
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Posted 29 October 2006 - 12:15 AM
can someone pin a thread on how to order a bolt?
on the topic of changing fom imp to met and all the stuff that occured in between,before i got interested in fasteners i stripped two toranas(74-77)of all their bolts and panel clips(for want of a better word) and sent them off to get zinc plated prior to my rebuild. its good fun trying to get 74 model bolts into 77 model clips. you need a big spanner and a lot of cutting oil.
on the topic of changing fom imp to met and all the stuff that occured in between,before i got interested in fasteners i stripped two toranas(74-77)of all their bolts and panel clips(for want of a better word) and sent them off to get zinc plated prior to my rebuild. its good fun trying to get 74 model bolts into 77 model clips. you need a big spanner and a lot of cutting oil.
#21
_Terrible One_
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Posted 29 October 2006 - 12:13 PM
It's funny seeing what a simple question can turn out to!
Thanks for that guys, got my bolts all sorted. The LJ just needs a little bit of wiring, rocker adjustment and she's ready to start and run in!
Thanks for that guys, got my bolts all sorted. The LJ just needs a little bit of wiring, rocker adjustment and she's ready to start and run in!
#22
_Monkey_
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Posted 14 November 2006 - 07:03 PM
Thats bgucking funnyIs this a thread thread?
Maybe I should bolt before I drive someone nuts
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