INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

5.3 243 heads vs. ls2 243 heads

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Old Jul 15, 2010 | 05:25 PM
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Default 5.3 243 heads vs. ls2 243 heads

I have an 07 sierra with a 5.3 and 243 heads. Was wandering the difference in other 243 casting heads if any.
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Old Jul 15, 2010 | 05:31 PM
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I believe they are the same
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Old Jul 15, 2010 | 05:52 PM
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Should be the same. I think only the Z06 243 heads had the sodium filled valves
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Old Jul 15, 2010 | 06:30 PM
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Exactly the same. Like white1 said, the only variance in 243 heads are the LS6 version with hollow intake and sodium filled exhaust valves.
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Old Jul 15, 2010 | 09:15 PM
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same but different springs. the ls2 243 has ls6 yellow springs.
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Old Jul 15, 2010 | 09:47 PM
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Originally Posted by fastrt
same but different springs. the ls2 243 has ls6 yellow springs.
Are you sure the trucks dont have the yellow ls6 springs?? Im just asking because I saw a truck engine for sale with the valve covers off and thought I saw yellow springs. Im not sure, just asking. I thought the trucks had the standard springs till I saw that pic
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Old Jul 15, 2010 | 09:50 PM
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Naw the trucks don't have yellow springs
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