water pump /pulley bolt?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mgicm · 11-26-2013, 11:01 AM

HI
Trying to find some bolts that go into the lower pulley on my 76 chevy motor and cant find them anywhere local. I have two bolts but of course need 4. Here is a pic. anyone know where I could grab them locally or is it a hunt in a junkyard. Would like to know the size so i have it for reference. Sure appreciate the help.

Tx Firefighter · 11-26-2013, 11:34 AM

Your question isn't clear. In the title you mention water pump but in the question you mention "lower pulley"

The water pump pulley uses 5/16 bolts while the crank pulley uses 3/8 bolts. Which one are you looking for ?

Mgicm · 11-26-2013, 11:40 AM

its the bolt that goes into the pulley. sorry for confusion. It used to have a fan on it but i removed for a different setup so now I need to find shorter bolts as pictured. The threads on these and the end are such that I cant find any available in auto stores.

thanks

Tx Firefighter · 11-26-2013, 12:26 PM

That's a normal 5/16 fine thread bolt.

Look at hardware stores for 5/16-24 by however long you need. Its a very common bolt.

xrcr · 11-26-2013, 12:28 PM

Go to a hardware store, take your old bolt to match thread and get a 5/16 grade 5 whatever length

Mgicm · 11-26-2013, 12:33 PM

hmm ive tried that. seems the end is tapered while the ones from the stores are not with threads to the end. So when it goes through the pulley I believe it is an issue. Its been a bit since I tried finding the bolt but i know the ones from ace and tractor supply didnt thread in at all. Didnt want to force it.

Tx Firefighter · 11-26-2013, 12:55 PM

You need to run a tap through the water pump holes then. An off the shelf 5/16 UNF bolt should screw right in place.

77 ChevySport · 11-26-2013, 02:26 PM

Quote:

Originally Posted by Mgicm

HI
Trying to find some bolts that go into the lower pulley on my 76 chevy motor and cant find them anywhere local. I have two bolts but of course need 4. Here is a pic. anyone know where I could grab them locally or is it a hunt in a junkyard. Would like to know the size so i have it for reference. Sure appreciate the help.

I bet your local Chevy Dealer will have them. Those a very common with
all Chevy Engines. If no luck any of the Corvette/Camaro catalogs will
have tons of them. Larry

P.S. Should be easy find at any auto junkyard.

Mgicm · 11-26-2013, 02:59 PM

i got it at a hardware store 5/16 24 fine thread thanks!

11-26-2013, 11:01 AM	#1
Mgicm Registered User Join Date: Sep 2013 Location: Nashville, tn Posts: 163	water pump /pulley bolt?? HI Trying to find some bolts that go into the lower pulley on my 76 chevy motor and cant find them anywhere local. I have two bolts but of course need 4. Here is a pic. anyone know where I could grab them locally or is it a hunt in a junkyard. Would like to know the size so i have it for reference. Sure appreciate the help. Attached Images

11-26-2013, 11:34 AM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: water pump /pulley bolt?? Your question isn't clear. In the title you mention water pump but in the question you mention "lower pulley" The water pump pulley uses 5/16 bolts while the crank pulley uses 3/8 bolts. Which one are you looking for ? __________________ I'm on the Instagram- @Gearhead_Kevin

11-26-2013, 11:40 AM	#3
Mgicm Registered User Join Date: Sep 2013 Location: Nashville, tn Posts: 163	Re: water pump /pulley bolt?? its the bolt that goes into the pulley. sorry for confusion. It used to have a fan on it but i removed for a different setup so now I need to find shorter bolts as pictured. The threads on these and the end are such that I cant find any available in auto stores. thanks

11-26-2013, 12:26 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: water pump /pulley bolt?? That's a normal 5/16 fine thread bolt. Look at hardware stores for 5/16-24 by however long you need. Its a very common bolt. __________________ I'm on the Instagram- @Gearhead_Kevin

11-26-2013, 12:28 PM	#5
xrcr Registered User Join Date: Dec 2008 Location: Foristell, MO Posts: 418	Re: water pump /pulley bolt?? Go to a hardware store, take your old bolt to match thread and get a 5/16 grade 5 whatever length

11-26-2013, 12:33 PM	#6
Mgicm Registered User Join Date: Sep 2013 Location: Nashville, tn Posts: 163	Re: water pump /pulley bolt?? hmm ive tried that. seems the end is tapered while the ones from the stores are not with threads to the end. So when it goes through the pulley I believe it is an issue. Its been a bit since I tried finding the bolt but i know the ones from ace and tractor supply didnt thread in at all. Didnt want to force it.

11-26-2013, 12:55 PM	#7
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: water pump /pulley bolt?? You need to run a tap through the water pump holes then. An off the shelf 5/16 UNF bolt should screw right in place. __________________ I'm on the Instagram- @Gearhead_Kevin

11-26-2013, 02:59 PM	#9
Mgicm Registered User Join Date: Sep 2013 Location: Nashville, tn Posts: 163	Re: water pump /pulley bolt?? i got it at a hardware store 5/16 24 fine thread thanks!



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