Valve Springs?
Valve Springs? So I was looking in a magazine and the part number for valve springs were in there. Magazine "Chevy LS1/LS6 V-8s Modifying and Tuning GenIII Engines"
LS1 97-04 PN 12553696 natural color
LS6 02-04 PN 12553696 yellow color
LQ4 99-04 PN 12553696 natural color
LQ9 02-04 PN 12552696 natural color (common to LS1 PN 12553696)
So what is the actual difference except the color? Are they actually all the same spring just different colors?
I am putting a LS6 cam in my car and worder do I really need to change valve spings?
LS1 97-04 PN 12553696 natural color
LS6 02-04 PN 12553696 yellow color
LQ4 99-04 PN 12553696 natural color
LQ9 02-04 PN 12552696 natural color (common to LS1 PN 12553696)
So what is the actual difference except the color? Are they actually all the same spring just different colors?
I am putting a LS6 cam in my car and worder do I really need to change valve spings?
TECH Senior Member
Joined: Feb 2009
Posts: 5,445
Likes: 4
yes there is differences,different colors for different cams.read the thread on cams,it mentions valve springs.more info on your car,m6 ,a4,rear gear?what cams have you looked at?check the dyno section power combos.
TECH Addict
Joined: Mar 2009
Posts: 2,099
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From: Texas/Afghanistan
a cam as small as an ls6 should not require springs, also you shouldn't go searching for factory gm springs either. if you are going to do a cam and go through all that trouble you might as well do it right. get a complete cam package that is matched to your set up. ls6 cam is crap, and factory springs have nothing on after market springs.
This advice will destroy your parts as stock LS1 spring cant handle over .525"ish lift. Anymore than that and they coil bind. The spring parts numbers are not all the same, it must be a typo.
There are also tons of people selling crappy LS1 cams as "LS6" cams, beware. Even if you do find a true LS6 cam, there are two versions "2001 385hp" and "2002-2004 405hp" version. Check the back of the cam for the four digit part number and check it against this site to see what cam it actually is. http://chevythunder.com/LS1%20components.htm.
The LS6 cam needs at least the LS6 springs (Yellow). But I agree that aftermarket cams and springs are much better for making more power. Comp Cams #26918 are a great spring. I run them on almost everything I build, including my own truck.
There are also tons of people selling crappy LS1 cams as "LS6" cams, beware. Even if you do find a true LS6 cam, there are two versions "2001 385hp" and "2002-2004 405hp" version. Check the back of the cam for the four digit part number and check it against this site to see what cam it actually is. http://chevythunder.com/LS1%20components.htm.
The LS6 cam needs at least the LS6 springs (Yellow). But I agree that aftermarket cams and springs are much better for making more power. Comp Cams #26918 are a great spring. I run them on almost everything I build, including my own truck.
