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LU3 with SFI

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Old Jun 22, 2022 | 09:31 AM
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Default LU3 with SFI
Does anyone know if the cylinder heads on 2005 Jimmy 4.3L are aluiminum or cast iron. Cannot find any RPO code online. Need to know cause the spark plug torque is different.

Thanks in advance.
 
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Old Jun 22, 2022 | 11:41 AM
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I guess I was wrong. 7 -15 LB-FT seems to be on both aluminun and cast iron. Sorry.
 
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Old Jun 22, 2022 | 04:40 PM
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In the future, a magnet would tell you in a second.
 
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