1fast bird

iTrader: (22)

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?

12secSS

iTrader: (30)

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.

69LT1Bird

iTrader: (1)

Who told you the springs are different. They are the same.

1fast bird

iTrader: (22)

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.

Summerwolf

iTrader: (3)

there are lots of options, sounds like it is time to talk to a sponsor.

1fast bird

iTrader: (22)

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!

12secSS

iTrader: (30)

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.

Hi-Po

iTrader: (4)

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.

1fast bird

iTrader: (22)

How do I know what year the block is?I want to order head studs soon and don't want the wrong ones.

GA95DCMSS

iTrader: (13)

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?

12secSS

iTrader: (30)

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.

GA95DCMSS

iTrader: (13)

Do you know of anyone having any problems with these and aftermarket springs?

69LT1Bird

iTrader: (1)

Just treat it like a normal LS1.