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5.4 heads

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Old 03-03-2010, 07:55 PM
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Default 5.4 heads
i have a set of 5.4 heads will they fit on a 4.6?
also how do i tell if they are pi heads?
thanks
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Old 03-03-2010, 09:09 PM
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these heads say 5.4 but im not entirely sure the engine is a 5.4
i will post numbers
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Old 03-03-2010, 10:39 PM
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engine numbers
22222122
POWLL
980118094754

head numbers
5.4 alloy-a
rf-f75e-6090-c20a
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Old 03-04-2010, 09:59 AM
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What year truck and what year 5.4?
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Old 03-04-2010, 05:40 PM
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the truck is a 2000 and i think but not for sure the engine is a 2001
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Old 03-04-2010, 10:11 PM
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well the 5.4 is pretty much trash
it has a bent rod and a bad crank
my buddy gave me a 4.6 with PI heads
it looks very clean and was pulled out for a knock
i think it is the timing chain
it has slack in it
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Old 03-15-2010, 02:01 AM
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Are you planning on installing a 4.6 in place of a 5.4?

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Old 03-15-2010, 07:26 PM
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yep
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Old 03-15-2010, 11:42 PM
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You will notice a measurable lack of power when you drive the vehicle with the smaller motor.

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Old 03-19-2010, 10:53 PM
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well it origianally had a 4.6 and this is number 3
does anybody want to buy a good 5.4 block and heads
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