the MORE tool is the **** by the way 
valve spring replacement help
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Staging Lane
Joined: Dec 2008
Posts: 79
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valve spring replacement help So im getting ready for a cam swap in my ls1 powered c5 this spring. I need to change the valve springs and would like to do so without removing the heads. in the past i've done this on blue ovals using the ol air-compressor. However those ford springs didnt have nearly the seat pressure of the 918's i will be running.
Does anyone know if the higher spring pressure presents a problem for replacing the springs this way or will the heads have to come off?
Does anyone know if the higher spring pressure presents a problem for replacing the springs this way or will the heads have to come off?
Last edited by synisterC5; Dec 15, 2008 at 05:52 PM.
I did my 918's on my first setup useing the top dead center method. Roll the engine over untill the cylinder your working on is all the way up and let the pistion hold the valve. no head removal. This will help too.
http://www.ls1howto.com/index.php?article=23
http://www.ls1howto.com/index.php?article=23
Last edited by conan; Dec 15, 2008 at 05:59 PM. Reason: add link
The easiest and fastest tool to use is the Crane 99472-1. It does 2 springs at a time and it's easily done with the heads on.
http://www.cranecams.com/?show=brows...Number=99472-1
http://www.cranecams.com/?show=brows...Number=99472-1
12 Second Club
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From: Bryant/Fayetteville, Arkansas
I always use TDC method, much easier and less time consuming than fighting to get the air fitting threaded in each plug hole.
Little tip. Before removing the old/factory valve springs, take a 5/8 plug socket and put it on top of the retainer on each spring. Give it a light wack with the hammer, it'll loosen the locks. If you don't do this, sometimes the locks won't come apart with the spring is compressed. This trick makes life a lot easier
Little tip. Before removing the old/factory valve springs, take a 5/8 plug socket and put it on top of the retainer on each spring. Give it a light wack with the hammer, it'll loosen the locks. If you don't do this, sometimes the locks won't come apart with the spring is compressed. This trick makes life a lot easier
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The easiest and fastest tool to use is the Crane 99472-1. It does 2 springs at a time and it's easily done with the heads on.
http://www.cranecams.com/?show=brows...Number=99472-1
http://www.cranecams.com/?show=brows...Number=99472-1
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Verdad Gallardo According to Vinci, they have a version that works on the LS3/L92.
http://www.vincihighperformance.com/...NT%20PAGE.HTML
The Crane Valve spring tool for the LS3/L92 is part number 99475-1
http://www.vincihighperformance.com/...NT%20PAGE.HTML
The Crane Valve spring tool for the LS3/L92 is part number 99475-1
Last edited by 405HP_Z06; Dec 16, 2008 at 07:24 PM.
