Cylinder Heads: Different Casting Numbers

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05-30-2014, 01:03 PM

treefingers

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Cylinder Heads: Different Casting Numbers

I have two cylinder heads with different casting numbers, but which are otherwise identical. One 706 head and one 862 head. What problems would you imagine would arise from using both of them on a build?

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05-30-2014, 01:33 PM

dr_whigham

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They're identical. You're good to go

Casting Number 706 and 862
Head: 1999+ LM4 4.8L / LM7 5.3 Liter Truck
Material: Aluminimum
Part Number:
12559862
12561706
Combustion Chamber Volume: 61.15cc
Compression Ratio: 9.5:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches