243 Sodium Filled Valve ID (5 pics included)
06-18-2007, 04:49 PM
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243 Sodium Filled Valve ID (5 pics included) I just bought a set of LS6 243 heads that are in pretty good shape. Link to heads.
How can I tell if they in fact do have the sodium filled valves?
Check out my pics of the heads in my garage from earlier this afternoon.
Thanks for any help you can give.
How can I tell if they in fact do have the sodium filled valves?
Check out my pics of the heads in my garage from earlier this afternoon.
Thanks for any help you can give.
06-18-2007, 05:07 PM
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If you have any stock valves to compare them to, you can pull one of the light weight valves and weigh it then do the same to a stock valve. If you're talking about any physical differences though, I'm not sure.
06-18-2007, 07:15 PM
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in that ad he didn't say they were soduim filled,just they were "stock valves".I'v seen some ls6 heads that didn't have sodium vales.
I hope you got what you paid for.
I hope you got what you paid for.
06-18-2007, 07:38 PM
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Is there a date code or something I can look at. Maybe one of those laser etched numbers on the head means something or will confirm these are LS6 heads.
06-19-2007, 07:46 AM
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Yea, weight and length would tell you if these are "sodium filled" valves or not..
Just like vanilla89 said, not all 243 casting heads came with light valves...
I'm looking for a set of those valves myself....
Just like vanilla89 said, not all 243 casting heads came with light valves...
I'm looking for a set of those valves myself....
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06-19-2007, 01:56 PM
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I plan on installing a set of Comp Cams 915 or 918 springs so I guess at that point I can weigh the valves and hope for the best. According the guy I bought the heads from they were 04 LS6 heads so they should have the lightweight valves. Thanks for the help guys, at least I have some information to go on when it comes time to install springs. I will at least weigh the valves.
06-19-2007, 02:01 PM
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Originally Posted by BerryWS6
but the LS6 vavles have longer vavle stems, because the LS6 cam had a smaller base circle
06-19-2007, 05:31 PM
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I just went out and spent some time cleaning the heads up a little. Looking for some kind of info that might give a hint to the age or build date of the heads. I found an 04 cast into each head. Could be nothing, could be something.
Both heads have green paint on them.
Anyway, they cleaned up really easy with Acetone in just a few minutes. Very little carbon build up on a few valves and it came off easily. I will disassemble the heads and have them hot tanked before installation still.
Both heads have green paint on them.
Anyway, they cleaned up really easy with Acetone in just a few minutes. Very little carbon build up on a few valves and it came off easily. I will disassemble the heads and have them hot tanked before installation still.
06-19-2007, 08:37 PM
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Originally Posted by Ericbigmac83
Someone wanna explain that one cause it doesnt seem accurate to me.
and I guess instead of putting longer push rods in, the base circle on the cam is smaller.
https://ls1tech.com/forums/generation-iii-internal-engine/327734-cam-guide.html
hope that helps
06-19-2007, 09:06 PM
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Originally Posted by BerryWS6
LS2's use those heads too, and they dont have the LS6 vavles. but the LS6 vavles have longer vavle stems, because the LS6 cam had a smaller base circle
06-19-2007, 10:42 PM
#14
What Donaimian said. Longer valves, the same pushrods.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
06-20-2007, 12:00 AM
#15
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Originally Posted by camaroextra
um the smaller base circle was compensated by longer pushrods.
06-20-2007, 07:10 AM
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Besides as mentioned with the weighing of the valve the only other way is to know the car they came off of. The ls6 sodium filled valves were only used in 2002, 2003, and 2004 Z06 243 heads.
06-20-2007, 01:04 PM
#17
Originally Posted by Sigforty
Besides as mentioned with the weighing of the valve the only other way is to know the car they came off of. The ls6 sodium filled valves were only used in 2002, 2003, and 2004 Z06 243 heads.
[The 'other' factory LS6 car]-Chris
06-21-2007, 09:34 AM
#20
I looked at a set of valves this morning. The 241 vs 243 valves looked to be the same length. I put them on a level surface and then put a digital level across the top and it was still level.
Have any LS6 valves around to measure? Which was that?
Have any LS6 valves around to measure? Which was that?