Valve overall height
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Valve overall height So I picked up a new project and I'm doing a bunch of research and searching around to look for information. One thing I'm having trouble with is finding overall valve heights. What I have is a 6.0 from a 2001 2500HD that's going into a 2001 Sonoma. I just picked it up yesterday so I haven't had a chance to tear anything down yet. I'm trying to figure out what the overall height of the intake and exhaust valve is on the 317 heads. Can anyone help me out here.
Somewhat related, do all of the LS Gen 3 heads use the same length valves, just different diameters?
I tried using the search feature but haven't been successful thus far.
Thank you in advance for any info you could share, links you could post, etc.
Somewhat related, do all of the LS Gen 3 heads use the same length valves, just different diameters?
I tried using the search feature but haven't been successful thus far.
Thank you in advance for any info you could share, links you could post, etc.
So I picked up a new project and I'm doing a bunch of research and searching around to look for information. One thing I'm having trouble with is finding overall valve heights. What I have is a 6.0 from a 2001 2500HD that's going into a 2001 Sonoma. I just picked it up yesterday so I haven't had a chance to tear anything down yet. I'm trying to figure out what the overall height of the intake and exhaust valve is on the 317 heads. Can anyone help me out here.
Somewhat related, do all of the LS Gen 3 heads use the same length valves, just different diameters?
I tried using the search feature but haven't been successful thus far.
Thank you in advance for any info you could share, links you could post, etc.
Somewhat related, do all of the LS Gen 3 heads use the same length valves, just different diameters?
I tried using the search feature but haven't been successful thus far.
Thank you in advance for any info you could share, links you could post, etc.
Found this
Stock LS1 valve length 4.867"
"The LS6 used lightweight valves with hollow stems starting in '02. The hollow intakes saved some weight, but the hollow exhausts were filled with sodium so they ran cooler. Both of these valves are 0.6 mm longer than the others because the cam for the '02 LS6 had a smaller base circle."
0.6mm = 0.0236"
By calculation only 02LS6 valve length = 4.890"
Also stumbled on this, nice little info chart to save to my computer.
http://www.smokemup.com/tech/ls1.php
Stock LS1 valve length 4.867"
"The LS6 used lightweight valves with hollow stems starting in '02. The hollow intakes saved some weight, but the hollow exhausts were filled with sodium so they ran cooler. Both of these valves are 0.6 mm longer than the others because the cam for the '02 LS6 had a smaller base circle."
0.6mm = 0.0236"
By calculation only 02LS6 valve length = 4.890"
Also stumbled on this, nice little info chart to save to my computer.
http://www.smokemup.com/tech/ls1.php
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Found this
Stock LS1 valve length 4.867"
"The LS6 used lightweight valves with hollow stems starting in '02. The hollow intakes saved some weight, but the hollow exhausts were filled with sodium so they ran cooler. Both of these valves are 0.6 mm longer than the others because the cam for the '02 LS6 had a smaller base circle."
0.6mm = 0.0236"
By calculation only 02LS6 valve length = 4.890"
Also stumbled on this, nice little info chart to save to my computer.
http://www.smokemup.com/tech/ls1.php
Stock LS1 valve length 4.867"
"The LS6 used lightweight valves with hollow stems starting in '02. The hollow intakes saved some weight, but the hollow exhausts were filled with sodium so they ran cooler. Both of these valves are 0.6 mm longer than the others because the cam for the '02 LS6 had a smaller base circle."
0.6mm = 0.0236"
By calculation only 02LS6 valve length = 4.890"
Also stumbled on this, nice little info chart to save to my computer.
http://www.smokemup.com/tech/ls1.php
Manley replacements are 4.874" interestingly, just general info I noticed while looking around. I've never looked up LS valve length, it's fairly hard to find. Info about the LS6 valve being longer is everywhere.
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Now to look at that chart you posted.
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Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Where'd you find that. I'm curious if the intake and exhaust are the same length. One would assume being a parallel valve head they would be, however, when you assume something, that's when it usually bites you in the ***. As far as the Manley valves being 4.874", I don't think 0.007" is going to make a huge difference on an engine with a hydraulic lifter.
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Verdad Gallardo Where'd you find that. I'm curious if the intake and exhaust are the same length. One would assume being a parallel valve head they would be, however, when you assume something, that's when it usually bites you in the ***. As far as the Manley valves being 4.874", I don't think 0.007" is going to make a huge difference on an engine with a hydraulic lifter.
look up manley valves and see if the intakes are the same as the exhaust
no it wont matter having the additional .007
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Yup, that's what I was doing. I've got a 4.8, a 5.3, and this 6.0. When I get them apart I will measure all the valves and see what I can see. Should be interesting.
If you could find a website that tends to have a good spec list you could look up an OE valve. Maybe scoggins dickey or rock auto has the info.
On all cylinders is a great resource, but no valve length mentioned.
On all cylinders may be better than the website I linked before
https://www.onallcylinders.com/2017/...ads-cam-specs/
I found a listing for a stock exhaust valve and it says 4.915 length. But I'm still looking.
On all cylinders may be better than the website I linked before
https://www.onallcylinders.com/2017/...ads-cam-specs/
I found a listing for a stock exhaust valve and it says 4.915 length. But I'm still looking.
GM intake valve 12563063
GM exh valve 12562954
That's the part numbers I got from a GM parts website, and couldn't find any info using the part numbers.
This is all I have found.. This site shows the lengths, you can try scrolling around more on their website. The links may get taken down since they are a non sponsor website. The intake and exh show to be different lengths
https://www.lsxceleration.com/stock-...-intake-valve/
https://www.lsxceleration.com/stock-...exhaust-valve/
GM exh valve 12562954
That's the part numbers I got from a GM parts website, and couldn't find any info using the part numbers.
This is all I have found.. This site shows the lengths, you can try scrolling around more on their website. The links may get taken down since they are a non sponsor website. The intake and exh show to be different lengths
https://www.lsxceleration.com/stock-...-intake-valve/
https://www.lsxceleration.com/stock-...exhaust-valve/
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
GM intake valve 12563063
GM exh valve 12562954
That's the part numbers I got from a GM parts website, and couldn't find any info using the part numbers.
This is all I have found.. This site shows the lengths, you can try scrolling around more on their website. The links may get taken down since they are a non sponsor website. The intake and exh show to be different lengths
https://www.lsxceleration.com/stock-...-intake-valve/
https://www.lsxceleration.com/stock-...exhaust-valve/
GM exh valve 12562954
That's the part numbers I got from a GM parts website, and couldn't find any info using the part numbers.
This is all I have found.. This site shows the lengths, you can try scrolling around more on their website. The links may get taken down since they are a non sponsor website. The intake and exh show to be different lengths
https://www.lsxceleration.com/stock-...-intake-valve/
https://www.lsxceleration.com/stock-...exhaust-valve/
In other words, I hate it when I can't confirm info, I only found one good source and one post with one dude stating the length, I'd rather be able to find multiple sources with the same info.
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
I’m with you on that. One source gives you an idea. Multiple sources with the same info give you info you can be somewhat confident in. Due to my work schedule it’ll be a little bit until I can get them torn down, but when I do I’ll be sure to post what I come up with.
I’m with you on that. One source gives you an idea. Multiple sources with the same info give you info you can be somewhat confident in. Due to my work schedule it’ll be a little bit until I can get them torn down, but when I do I’ll be sure to post what I come up with.
Where'd you find that. I'm curious if the intake and exhaust are the same length. One would assume being a parallel valve head they would be, however, when you assume something, that's when it usually bites you in the ***. As far as the Manley valves being 4.874", I don't think 0.007" is going to make a huge difference on an engine with a hydraulic lifter.