200 Headbolts

[64.5 TX Stang]

What is the size and length fo the 200 headbolts? I would measure mine, but they are currently in use .

Thanks!

 

[pedal2themetal45]

If you need new ones just go to the parts house and order some...
are you bad or something??
tim

 

[64.5 TX Stang]

I am looking for less expensive options to ARP bolts/studs. AFAIK the ones in my car now are just fine.

 

[Bort62]

I belive 3.5" 7/16 coarse thread, Grade 8.

 

[61Futura]

Mine measure 3 1/8" or slightly less for the shank of the bolt. The thick head on it makes the bolts total length just under 3 1/2". The first 2" of the shank has no threads. 7/16th" coarse looks right for the thread size. The head of the bolt has a raised wahser shaped area under it so the corners of the bolts head won't be rubbing against the engines head when torqueing the bolt down.

 

[Anonymous]

The closest size studs McMaster-Carr sells is 4" long overall

http://www.mcmaster.com/itm/find.ASP?ta ... =90281A317

They are rated at 125,000 psi. :thumbdown:
If you can find a source of something better, then let us know. I wouldn't trust 125K rated studs unless the engine was stock.

 

[64.5 TX Stang]

What are ARP bolts rated to?

 

[63comet]

You can also buy 7/16" threaded rod (bolting) in 36" lengths of grade 8 and cut them to any length you want. That is what I did. I also bought grade 8 washers and nuts.
http://i141.photobucket.com/albums/r54/ ... 140002.jpg

 

[Anonymous]

What are ARP bolts rated to?

It's on the website but I want to say 190,000

 

[Bort62]

125ksi is pretty f'in strong...

 

[64.5 TX Stang]

Oh yeah Bort I absolutely agree that 125ksi is strong, when you consider run of the mill steel is 36ksi. I don't know if for head bolts that additional strength of the ARP studs/bolt would make much difference. The rod and main bolts might see loading where the additional strength would make a difference.

 

[Anonymous]

Yeah, you're right....130K to 150K is what classifies grade 8

http://www.boltdepot.com/fastener-infor ... Chart.aspx

 

[64.5 TX Stang]

So what are the stock headbolts?

 

[matt1967]

So what are the stock headbolts?

grade 8