5.4 3 valve heads - TCCoA Forums
 
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post #1 of 11 (permalink) Old 09-18-2006, 06:53 PM Thread Starter
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5.4 3 valve heads

I have searched a few forums and could not find an answer to this. It's probably a stupid question, but I have come across a free set of bare 3V 5.4L heads and an intake manifold from a 4.6L 3V...if I get the rest of the top end and an updated fuel delivery system would a head swap be feasible on a '95 4.6? The heads will probably just sit in my closet for a long time anyway and I know the intake manifold won't fit under my hood, but I'm still curious. I have no experience with the 3V or the 5.4L motors.

Oh, and yes, I know it would be easier and smarter to do a PI swap...but you can't turn down free stuff.

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post #2 of 11 (permalink) Old 09-18-2006, 06:55 PM
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no!!!!!!

sell em on ebay.




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post #3 of 11 (permalink) Old 09-18-2006, 09:14 PM
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"feasible" is gonna depend on your intelligence, ingenuity, bank account, and patience....got enough of those attributes? if so, go for it....if not, sell 'em
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post #4 of 11 (permalink) Old 09-18-2006, 11:42 PM
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Well you could always delete the CMC plates, and disable the VCT. Put on a TB adapter and find a set of 3v headers/manifolds that will work. Everything else should be pretty straight forward.




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post #5 of 11 (permalink) Old 09-19-2006, 08:33 AM
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After having said that are you positive they will bolt to a 94 block and all the coolant passages etc line up???? Maybe they do I don't know but you stated that like you have done it before.

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post #6 of 11 (permalink) Old 09-19-2006, 09:26 AM
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I know a DOHC 4.6L heads don't "easily" work on a SOHC block (timing tensioner issues), so I can only guess at the nightmare of installing 3V heads!!

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post #7 of 11 (permalink) Old 09-19-2006, 02:02 PM
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Quote:
Originally Posted by timb
After having said that are you positive they will bolt to a 94 block and all the coolant passages etc line up???? Maybe they do I don't know but you stated that like you have done it before.
I haven't. Others have, the block is the same.




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post #8 of 11 (permalink) Old 09-20-2006, 03:56 PM
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i'm not sure how feasible it is in a mn, but the heads outflow 2v.

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post #9 of 11 (permalink) Old 09-20-2006, 05:20 PM Thread Starter
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Quote:
Originally Posted by GreenBird
Well you could always delete the CMC plates, and disable the VCT. Put on a TB adapter and find a set of 3v headers/manifolds that will work. Everything else should be pretty straight forward.
That's what I was hoping for.

Quote:
Originally Posted by timb
After having said that are you positive they will bolt to a 94 block and all the coolant passages etc line up???? Maybe they do I don't know but you stated that like you have done it before.
The coolant passages and timing tensioners are my main concern.

Thanks a lot guys, I'll probably hold on to the heads for a while and investigate it some more. I'll try to get a good look at the head gaskets for both engines at a parts store to see about the coolant passages.

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post #10 of 11 (permalink) Old 09-20-2006, 05:31 PM
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The simplest way is just to get a whole 3v motor and wiring/compter and swap everything in leave no tbird electronices. Coares you probably wouldn't get a HVAC system to work correctly and guages is another issue plus abs but i bet with manual brakes and no ac it could be done.

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post #11 of 11 (permalink) Old 09-20-2006, 05:34 PM
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Well actually the simplest would be to buy a mustang and forget this ultra custom stuff but wheres the fun in that.

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