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| anthonygubbin |
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hi does anyone know what the minimum thickness is for a ef 4.0 head and also what the original thickness is when new.
regards 
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| WagonDad |
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The gregorys manual say's to to check head thickness by measuring between three measuring pad's, one on the intake side on # 3 intake port and two on the exhaust side towards the ends. any thing under 1.5mm from pad to gasket surface and the head should be replaced. I wouldn't take this as gospel because plenty of people remove 40 thou to raise compression and probably go less than this measurement.
_________________ 4.0L EF Fairmont Station Wagon. EL GT Snorkel. K&N Pod in air box. 3" Intake piping.
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| cjh |
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40 thou is 1.0mm or near enough.
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| luke111 |
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what compression ratio would you end up with 40thou shaved off?
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| anthonygubbin |
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thanks for your help guys but i found out today that my head is stuffed seems like the previuos owner must have cooked it as she was soft and warped almost 2mm.
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| naughtyfalcon |
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just for info sake,,the thickness of the 4 litre and 3.9 heads from top to bottom should be 15 cms
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