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Generation III Internal Engine 1997-2006 LS1 | LS6
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'04 lq4?

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Old Sep 6, 2008 | 08:04 PM
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Default '04 lq4?
I'm looking to get valve springs for my lq4.Apparently there's a difference between '03 and'04.I'm not sure if I have an '04 or not.That's what the guy said that I bought it from.How can I tell the difference?
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Old Sep 6, 2008 | 08:08 PM
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They are the same physical size and shape from 1997 to current. Are you looking for stock replacement or aftermarket? For stock replacement I would recommend the Yellow Spring found on LS6, LS2 engines. For aftermarket it depends on the lift of the chosen cam.
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Old Sep 6, 2008 | 08:10 PM
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Who told you the springs are different. They are the same.
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Old Sep 6, 2008 | 08:10 PM
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I'm doing a turbo build and want springs good to .650 lift.I noticed there are springs up to '03 and some for '04 on.
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Old Sep 6, 2008 | 08:14 PM
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there are lots of options, sounds like it is time to talk to a sponsor.
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Old Sep 6, 2008 | 08:27 PM
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Sorry ,I must be an idiot.What is the difference between an '03 and an '04?I noticed that the head studs are different.I don't know why I was thinking springs.Long day!
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Old Sep 7, 2008 | 01:25 AM
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Originally Posted by 1fast bird
Sorry ,I must be an idiot.What is the difference between an '03 and an '04?I noticed that the head studs are different.I don't know why I was thinking springs.Long day!
Just that, GM wised up and change the head bolts from two differewnt lengths to one standard length. No more short length bolts on the ends.
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Old Sep 7, 2008 | 11:48 AM
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I have the Yellow Springs installed and really wish I could get more out of them. I would opt for a dual spring, they are alittle pricey but well worth it.
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Old Sep 8, 2008 | 02:43 PM
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How do I know what year the block is?I want to order head studs soon and don't want the wrong ones.
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Old Sep 8, 2008 | 02:48 PM
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Not to thread jack, but I have one out of an 05 yukon in my 1995 Impala and remember hearing something about GM switching to one-piece valve spring seats/ valve stem seals. Does anyone have any information on this?
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Old Sep 8, 2008 | 02:59 PM
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Chances are you have the equal length head bolts. I would double check the length, do you have the heads on it currently? If so simply remove them and see, if not then you will need to use a spare bolt to measure the engagement depth.

In 1999 GM switched to a one piece valve seat and seal.
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Old Sep 8, 2008 | 03:11 PM
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Originally Posted by 12secSS
Chances are you have the equal length head bolts. I would double check the length, do you have the heads on it currently? If so simply remove them and see, if not then you will need to use a spare bolt to measure the engagement depth.

In 1999 GM switched to a one piece valve seat and seal.
Do you know of anyone having any problems with these and aftermarket springs?
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Old Sep 8, 2008 | 03:23 PM
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Just treat it like a normal LS1.
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