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4.6L OE Rocker Arms

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  #1  
Old 12-23-2014, 12:13 PM
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Default 4.6L OE Rocker Arms
I ordered rocker arms for my '03 DII and was sent cast aluminum for the left side and what appears to be cast iron for the right side. What was used on the '03-'04 4.6L's?
 
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  #2  
Old 12-23-2014, 12:17 PM
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all the oe I have seen are aluminum
 
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Old 12-23-2014, 12:28 PM
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Originally Posted by dusty1
all the oe I have seen are aluminum
That's what I was thinking; 4.0 and 4.6L being aluminum and perhaps the earlier 3.9 and 4.2L using cast iron. Not comfortable with mixing these, due to the weight difference in the valvetrain.
 
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Old 12-23-2014, 12:37 PM
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you buy them new?
$9-$11 new original equipment at partsgeek
 
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Old 12-23-2014, 01:32 PM
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Yeah, they were new, but lefts were aluminum and rights were iron.
 
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Old 12-23-2014, 02:33 PM
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I don't see how weights will make any difference. It's not like this is part of the rotating mass. Just my opinion.
 
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Old 12-23-2014, 05:29 PM
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Try to get them to replace them all with steel. The aluminum ones have little steel caps pressed into them where they meet the pushrods
 
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Old 12-24-2014, 01:44 PM
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Both have the steel inserts pressed in.
 
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