Ford 4.6 Intake Manifold Warpage/leaks ? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-29-2005, 07:44 PM
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Ford 4.6 Intake Manifold Warpage/leaks ?

I am hearing that there have been some problems with the 4.6 plastic intake manifold with leaks and warpage. Anyone have any experience with this? or hearsay evidence.?
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Old 08-29-2005, 08:05 PM
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I know the ones in the Grand Marquis & other Ford cars of this general size that use the 4.6 have a platic cross-over right behind the alternator and they all seem to finaly split right there...? The trucks have alum cross-over`s as do the replacement manifolds... Is this what you mean...?
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Old 08-29-2005, 08:33 PM
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Quote:
Originally Posted by Bumpstick
I know the ones in the Grand Marquis & other Ford cars of this general size that use the 4.6 have a platic cross-over right behind the alternator and they all seem to finaly split right there...? The trucks have alum cross-over`s as do the replacement manifolds... Is this what you mean...?
I looked at a 97 Town Car today with a new entirely plastic intake manifold that was just installed because of a leak/warpage problem. ????????
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Old 08-29-2005, 09:02 PM
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Was an old part from stock for sure... All the ones I get from local Ford dealer are now upgrades with the alum cross-over...


Also the aftermarket units are the same... Dorman makes one that is pretty good but I prefer the Ford part even thought it cost quite a bit more...
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Old 08-29-2005, 09:49 PM
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Quote:
Originally Posted by Bumpstick
Was an old part from stock for sure... All the ones I get from local Ford dealer are now upgrades with the alum cross-over...


Also the aftermarket units are the same... Dorman makes one that is pretty good but I prefer the Ford part even thought it cost quite a bit more...
I mean the entire intake manifold is black, and looks like plastic. The fuel injectors stick right into this plastic stuff.....
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Old 08-30-2005, 05:36 AM
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Yes the intake runners are the black plastic but the water cross-overs on the newer intakes are alum... This was a corrective move because of the plastic not taking the heat over a period of time...
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Old 08-30-2005, 11:07 AM
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Xntrik,
Bumpstick is right.
Someone was using up NOS crap..
If you are going to buy the car make them change the intake to the newer style..
I had 7 of them in my fleet in the crown vic's..
I had 6 of them replaced after splitting..
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Old 08-31-2005, 10:44 PM
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thanks guys, I just don't know much about the 4.6 yet.... I am still stuck in the pushrod engines.... lol
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Old 09-01-2005, 12:00 AM
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I'm learning more as I go...
I never thought I could live without a pushrod motor...
Now have 3 cars and no pushrods...
Still not sure if the 55 will have a 4.6 or not, looking into the fit.
If it fits it will be there... Got to love the revs without worrying about bending a pushrod.
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Old 09-02-2005, 12:00 AM
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I had a 4.6 DOHC and it is good, but not like a 428 CJ.
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