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Old 06-27-2015, 08:34 AM   #1
djpelosi
 
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Drives: 2010 Camaro 2SS/RS
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Valve springs

So, I have a cracked valve spring and I called my local dealer to check availability. My motor is the LS3, and I have the stock yellow springs. My dealer said that their LS3 springs are blue, and don't have any in stock... and their L99 springs are just a metal color and have 10 in stock.

1.) Does the color matter? If mine are yellow and theirs are blue, will there be any issues in the motor, other than my OCD for knowing I have one blue valve spring?

2.) Will an L99 spring work in an LS3 motor?

Thanks
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Old 06-28-2015, 08:34 AM   #2
christianchevell
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You have that you know of one cracked spring.... That IMO would make me wonder if you have done a mechanical over rev and should be looking to replace all the springs and all the pushrods as I should have done after my over rev...( not I have a new engine)...dropped a valve.

The GMPP heads I ordered came with blue conical "beehive" springs that are only good to .550 lift according to the specs and with our .550/.551 stock cam are insufficient especially being single... You need to match and get the right valve spring for stock ls3 motor and If I were you I would just change them all and check the pushrods. BTW with a cam and increased lift a person should usually check and or replace their valve springs every 25k if possible as they do fatigue and that's a big reason why g.m. stayed with the lift on stock LS motor as anything over .550 and it requires more due diligence and even .550 lift is well frankly a lot compared to good old flat tappet cams. G.m.s performance cams the hot stick and ASA cam are just longer durations and tighter LSA ..not higher lift, the ASA cam is .525/.525 and makes 525 h.p..... More in line with what the springs could handle on the GMPP heads I got off of summit ported for 1200$. Good luck.
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