The Ford Barn

modela4shane · 01-09-2022, 05:16 PM

I have a 59A in the machine shop that has its main cap studs and nuts missing. I'm curious on your thoughts on using bolts instead of studs with nuts. Speedway sells ARP main cap bolts and washers for a reasonable price. Ford used bolts on the 8BA but im not sure if it would be safe to do the same on a 59A. Thoughts or experiance would be appreciated on this issue.

Ronnieroadster · 01-09-2022, 05:34 PM

Replacing the studs with bolts is what I always do on the 59A engine's I build. On some highly modified flathead builds I will use ARP studs and their washers and nuts for the main bearing caps.
Ronnieroadster

Bored&Stroked · 01-10-2022, 01:13 PM

One thing to note - when you change the main cap hardware, make sure they check the main bores. Sometimes one has to align bore/hone the mains when the hardware has changed. If you have the original caps, the chances are you'll be okay - just make sure they check everything with the final hardware that you plan to use.

I typically use ARP main studs/washers/nuts (high performance builds) - as I like to torque on the fine threads (top of studs) and not on the coarse threads that are in the block.

modela4shane · 01-19-2022, 02:16 PM

Thank you for the replys. Would you happen to have the ARP numbers for the studs, washers and nuts that you used from ARP. Thank you.

Bored&Stroked · 01-19-2022, 02:23 PM

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I just buy a kit from Red's Headers:

https://reds-headers.net/index.php?m...q5e2dr0tpk5g86

01-09-2022, 05:16 PM	#1
modela4shane Senior Member Join Date: Jul 2011 Posts: 165	59a main cap studs or bolts question? I have a 59A in the machine shop that has its main cap studs and nuts missing. I'm curious on your thoughts on using bolts instead of studs with nuts. Speedway sells ARP main cap bolts and washers for a reasonable price. Ford used bolts on the 8BA but im not sure if it would be safe to do the same on a 59A. Thoughts or experiance would be appreciated on this issue.

01-09-2022, 05:34 PM	#2
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,524	Re: 59a main cap studs or bolts question? Replacing the studs with bolts is what I always do on the 59A engine's I build. On some highly modified flathead builds I will use ARP studs and their washers and nuts for the main bearing caps. Ronnieroadster __________________ I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH

01-10-2022, 01:13 PM	#3
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,060	Re: 59a main cap studs or bolts question? One thing to note - when you change the main cap hardware, make sure they check the main bores. Sometimes one has to align bore/hone the mains when the hardware has changed. If you have the original caps, the chances are you'll be okay - just make sure they check everything with the final hardware that you plan to use. I typically use ARP main studs/washers/nuts (high performance builds) - as I like to torque on the fine threads (top of studs) and not on the coarse threads that are in the block.

01-19-2022, 02:16 PM	#4
modela4shane Senior Member Join Date: Jul 2011 Posts: 165	Re: 59a main cap studs or bolts question? Thank you for the replys. Would you happen to have the ARP numbers for the studs, washers and nuts that you used from ARP. Thank you.

01-19-2022, 02:23 PM	#5
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,060	Re: 59a main cap studs or bolts question? Sponsored Links (Register now to hide all advertisements) I just buy a kit from Red's Headers: https://reds-headers.net/index.php?m...q5e2dr0tpk5g86

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