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Knucklehead Valve height etc..

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Buddhahoodvatoloco
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Knucklehead Valve height etc..

#1

Post by Buddhahoodvatoloco » Fri Jul 20, 2018 3:42 am

[bKnucklehead Valve height etc..
I have attached a picture, I have reviewed the knowledge base and I can not find this spec.
Need to know the height as depicted in picture.
Going round and round with the machinist, Good guy, just stubborn.][/b]
Attachments
dscf0055.jpg
dscf0055.jpg (77.73 KiB) Viewed 391 times



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Re: Knucklehead Valve height etc..

#2

Post by Doc37W » Fri Jul 20, 2018 7:47 pm

Buddhahoodvatoloco wrote:
Fri Jul 20, 2018 3:42 am
[bKnucklehead Valve height etc..
I have attached a picture, I have reviewed the knowledge base and I can not find this spec.
Need to know the height as depicted in picture.
Going round and round with the machinist, Good guy, just stubborn.][/b]
If you're looking for info to make a valve stem height gauge for a knuckle, H-D didn't make them untill they brought out the Pan & showed it in the Service manual (which is where that picture is located). Make sure your machinest isn't trying to put the Pan valve pictured in a Knuckle! Doc

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Re: Knucklehead Valve height etc..

#3

Post by RUBONE » Fri Jul 20, 2018 9:57 pm

Pan valves are longer overall length than a Knuckle to elaborate on Doc's concern.

Buddhahoodvatoloco
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Re: Knucklehead Valve height etc..

#4

Post by Buddhahoodvatoloco » Fri Jul 20, 2018 10:54 pm

Thanks,
guess no one knows. I am not doing a pan, I am finishing up a knucklhead,
1941 to be specific.

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Re: Knucklehead Valve height etc..

#5

Post by panheadrider1961 » Sat Jul 21, 2018 12:30 am

http://knuckleheadtheology.blogspot.com , Try this my friend interesting reading and i think you will find your answer here he has helped me in the past

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Re: Knucklehead Valve height etc..

#6

Post by Buddhahoodvatoloco » Sat Jul 21, 2018 3:19 am

Thank you, I am on it.
panheadrider1961 wrote:
Sat Jul 21, 2018 12:30 am
http://knuckleheadtheology.blogspot.com , Try this my friend interesting reading and i think you will find your answer here he has helped me in the past

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Re: Knucklehead Valve height etc..

#7

Post by ultrapan » Sat Jul 21, 2018 5:14 am

I have a book that says 1.570 max on intakes and 1.620 max on exhausts

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Re: Knucklehead Valve height etc..

#8

Post by Buddhahoodvatoloco » Sat Jul 21, 2018 2:17 pm

Thanks, what book would that be, please.
ultrapan wrote:
Sat Jul 21, 2018 5:14 am
I have a book that says 1.570 max on intakes and 1.620 max on exhausts

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Re: Knucklehead Valve height etc..

#9

Post by ultrapan » Sat Jul 21, 2018 4:14 pm


The information is on page 83

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Re: Knucklehead Valve height etc..

#10

Post by pan620 » Sun Jul 22, 2018 6:16 pm

Thanks,
guess no one knows. I am not doing a pan, I am finishing up a knucklhead,
1941 to be specific.
But the valve in the picture is not a Knucklehead valve, guess you no that tho!

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Re: Knucklehead Valve height etc..

#11

Post by Blind Melon » Wed Jul 25, 2018 7:13 pm

When the installed height of the valve stem tip is too low, like with new valve seats the pushrod end of the rocker arm
can touch the inside roof of the knuckle casting... This will put a dimple or broke circle in the top of the rocker casting..
Best to check valve installed height . My notes say must be more that 1.532" from the top of the stem to the shoulder on
the guide.. If the rocker foot that pushes on the valve has been reground...A larger installed height must be used.

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Re: Knucklehead Valve height etc..

#12

Post by Buddhahoodvatoloco » Thu Jul 26, 2018 2:44 pm

Thanks, for that. Bring the motor home today.
Blind Melon wrote:
Wed Jul 25, 2018 7:13 pm
When the installed height of the valve stem tip is too low, like with new valve seats the pushrod end of the rocker arm
can touch the inside roof of the knuckle casting... This will put a dimple or broke circle in the top of the rocker casting..
Best to check valve installed height . My notes say must be more that 1.532" from the top of the stem to the shoulder on
the guide.. If the rocker foot that pushes on the valve has been reground...A larger installed height must be used.

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