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Old 02-28-2013, 10:30 PM
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Chevy small block and big block bolt lengths

Could somebody out there point me to a list of small block and big block chevy bolt lengths?
Im too lazy to start stripping motors apart right now and I want to make some stainless steel bolt kits for future projects

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Old 02-28-2013, 10:34 PM
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Why not just buy them?
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Old 02-28-2013, 10:43 PM
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I want mine to be button head bolts instead of the plain old allen head bolts everybody sells
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Old 02-28-2013, 11:07 PM
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See Shop Totally Stainless.com - Home, they have complete buttonhead engine bolt kits. Used a set on my 507" Cadillac....very nice and only about $35
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Old 02-28-2013, 11:27 PM
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These are the kind of bolts I was talking about,I checked their site but they didn't specify bolt types unless I just wasn't looking in the right place
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Old 03-01-2013, 07:21 AM
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If you are going to use them on your engine you will regret it. They suck when trying to torque and impossible for tight places. If you plan on selling them, I don't know of anyone that would buy them for the reasons above. Valve covers and light duty app may work bit forget using them on critical torque apps.
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Old 03-01-2013, 07:30 AM
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Ive used them on valve covers/timing covers and oil pans and water pumps before without problems ,I use the small headed arp bolts on intake manifolds
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Old 03-01-2013, 07:38 AM
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very weak style bolt.. easy to snap head off.. and with s/s and alum or iron.. not play'n nice together.. I'd not want a weaker style..
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Old 03-01-2013, 07:55 AM
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Stainless and aluminum will almost fuse togther over time even with antiseize, i have them in my motor ferderwells hood hinges ,, IF i could get them out i would replace them ,also they have Less strength than a grade 3 bolt They will BREAK ,my advice is dont use S/S use a grade 5 or better on engine parts,
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Old 03-01-2013, 09:17 AM
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Well I guess all those dragbikes Ive been putting together over the years using stainless steel hardware and a little anti seize on the threads will be falling apart at any time now!
Ive been in the plumbing/electrical/hvac trades now on and off since about 1982,I know a little bit about electrolysis(spell check)
Anyway Im running the bolts into cast iron engine blocks in this case,theres no need to run a grade 5 bolt to hold a timing chain cover or an oil pan on a motor.
I grew up around flat bottem v-drive dragboats with blown big block chevys sitting in the back,Ive also owned a couple in the past as well.
And we used stainless steel bolts all over on those bolts including bell housing bolts.
There are stainless steels out there that can be be heat treated to obtain a tensile strength of 160,000 psi,so go easy labeling all stainless fasteners as weak.
And what do you think the tensile strength of an aluminum cylinder head or intake manifold your threading the bolt into is?
So anyway Ill just buy a set of bolts and measure the lengths to get my answer since nobody seems to know here.
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Old 03-01-2013, 09:30 AM
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If you already know the answer and claim to know everything ,why are you askin,anyway,
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Old 03-01-2013, 09:41 AM
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I asked about bolt lengths so I don't have to tear a motor apart to measure them,I didn't ask about bolt tensile strength or bolts seizing to other materials you guys brought that up!
I asked what I considered a reasonable question,apparently it was not.
So I will just go to napa and buy some cheap chrome bolts to measure.
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Old 03-01-2013, 11:11 AM
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I hate allen and star bolts for engines. I had them on my 1.8t and when i did the timing belt i stripped nearly all of them. Such a pain to try to keep the bit perfectly in place while torquing in all down. I swapped some out for regular hex heads and the rest i replaced. No way I'd ever choose to put them in an engine if i could have normal bolts. Unless maybe in the valve cover, or to hold the carb down, but that's it.
Anyway....
I can get you the lengths of the bolts for a small block, i have a whole set here. Let me know which ones you want.
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Old 03-01-2013, 12:07 PM
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You are going to find many OEM bolt and studs are not standard normally available lengths. The threaded portions are also often not standard, many have unthreaded shanks before the threads start. The underhead fillets are also important for strength in a lot of applications and will be hard to duplicate using common off-the-shelf fasteners. In my opinion, the only practical way to go about this will be to contract w/a manufacturer to produce what is needed. The thing is ARP has this covered already.
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Old 03-01-2013, 03:36 PM
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Quote:
Originally Posted by bigdog7373 View Post
I hate allen and star bolts for engines. I had them on my 1.8t and when i did the timing belt i stripped nearly all of them. Such a pain to try to keep the bit perfectly in place while torquing in all down. I swapped some out for regular hex heads and the rest i replaced. No way I'd ever choose to put them in an engine if i could have normal bolts. Unless maybe in the valve cover, or to hold the carb down, but that's it.
Anyway....
I can get you the lengths of the bolts for a small block, i have a whole set here. Let me know which ones you want.
Thank you sir !
The oil pan /timing cover and water pump bolt diameters and lengths are what I really need.
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