Hello All
I'm not a techy as a lot of you, so maybe you can answer this question
My 56 Packard Valves are 5.712, and 5.690
I have not found the 5.712 length but have found a Ford 385 series 5.725
is this close enough or can I take that much off the tip of the valve stem.
Also the Packard valve stem are 3/8 which is 0.375, the Packard does not use valve guides as such
the are cast into the heads, The Ford Dia is .3415.. do you think this would be too sloppy and maybe could
be bushed
Yes I know this is a Ford forum and I'm a Ford guy, have two of them. I know you guys on her
are usually very helpful..
Best

 

There were days when valves were "Dressed up" and shops and people doing the work were aware of the limitations.

I'm not even sure of this, but some machine shops have the equip to determine the "hardness" of material and they just might be better able to provide an answer to the question of just how much material can be removed from a valve stem. That was a common procedure back then , but today it probably is much easier to just replace valves.

You might also inquire from a machine shop if there is enough casting to redo and install sleeve as a valve guide.. Sure an interesting project, let us know what you decide, thanks.

Do the rocker arms have adjusting screws , I believe they did not use hydraulic lifters back then, sure goes back some.

 

I remember the days... Not much in machine shop work now...
unless you got one of these old hunks of metal.
Of course I can't run out and buy new valves for the Packard..
I have found some close in length and that is why my question.
looking at the head, they did not leave much room for a bigger valve. in 1955 the intake was 1.917 ?
in 56 they went to 2.0" That old 374 needs more breathing... the stock heads flow 270 cfm

thanks
Best