Trashed 99 Cobra Block

whitesnake · February 23rd, 2007, 01:22 PM

Ok guys after searching for a couple of hours I still can't find a clear answer. I have a 99 cobra that decided to spit out two rods through the block. My ? is since my heads are fine what motor is a direct replacement? I have heard Mark 8 motor, expedition, police 4.6, I will be using my heads and intake.

ReverendDexter · February 23rd, 2007, 02:13 PM

I would think that any 4v 4.6L block would work, terminator blocks are going to be iron, I'm guessing you want to stay with aluminum. I know that the later lincolns ran the 32v, I didn't know that the expedition ran a 32v, I thought it was the regular 2v motor. The navigator has the 5.4, but I believe the Aviator has the 4.6, Any Cobra from 96-01 should have that block (R models excepted, of course).

Or you could take the chance to get a stroker in there, since you're replacing your bottom end anyway... get one of the 5.0 kits... hehehheh.

Drgnracin72 · February 23rd, 2007, 03:21 PM

+1

Slicey · February 23rd, 2007, 03:57 PM

Originally Posted by ReverendDexter

Or you could take the chance to get a stroker in there, since you're replacing your bottom end anyway... get one of the 5.0 kits... hehehheh.

HURRAY low RPM's!! But damn it be sweet.!!

whitesnake · February 27th, 2007, 08:14 PM

Anybody else? Can I just use a 00-03 Gt shortblock? Any difference between cranks,rods, pistons, compression?

MustangMatt96GT · February 27th, 2007, 09:16 PM

Well the GT block is single over head cam, so it will not work. I would suggest a 5.0 stroker aswell, but if money is an issue, just rebuild with another block mention above.

GTpwrdCapri · February 28th, 2007, 04:07 AM

actually the sohc block could work if you feel like spending the time and money to have the machine work done to retrofit the dohc heads. but then the real wortk will be to swap the front part of the motor. i thought i read where someone tried this on another forum.

the mark8 block would be you best bet i think. when they are properly buuilt the aluminum block can handle 1000hp the mark8 block were made in italy. place called teksid i believe. very goo d block from what i have read.

as long as its a dohc motor it will work.why not for the 5.4 dohc!!!

February 23rd, 2007, 01:22 PM	#1
whitesnake Newbie Join Date: Feb 2007 Posts: 2	Trashed 99 Cobra Block Ok guys after searching for a couple of hours I still can't find a clear answer. I have a 99 cobra that decided to spit out two rods through the block. My ? is since my heads are fine what motor is a direct replacement? I have heard Mark 8 motor, expedition, police 4.6, I will be using my heads and intake.

February 23rd, 2007, 02:13 PM	#2
ReverendDexter Hardcore Enthusiast 1998 SVT Cobra Join Date: Jan 2007 Location: Santa Rosa, CA Posts: 1,340	I would think that any 4v 4.6L block would work, terminator blocks are going to be iron, I'm guessing you want to stay with aluminum. I know that the later lincolns ran the 32v, I didn't know that the expedition ran a 32v, I thought it was the regular 2v motor. The navigator has the 5.4, but I believe the Aviator has the 4.6, Any Cobra from 96-01 should have that block (R models excepted, of course). Or you could take the chance to get a stroker in there, since you're replacing your bottom end anyway... get one of the 5.0 kits... hehehheh. __________________ ---------------------------------------------------------- The Sacred Chao says "MU" '96 Bronco XLT '98 Cobra '89 Camry AllTrac

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February 27th, 2007, 08:14 PM	#5
whitesnake Newbie Join Date: Feb 2007 Posts: 2	Anybody else? Can I just use a 00-03 Gt shortblock? Any difference between cranks,rods, pistons, compression?

February 27th, 2007, 09:16 PM	#6
MustangMatt96GT All Throttle with a Bottle 1996 Mustang GT 12.91@105.29 @ 5800 FT Join Date: Dec 2006 Location: Lakewood, CO Posts: 7,314	Well the GT block is single over head cam, so it will not work. I would suggest a 5.0 stroker aswell, but if money is an issue, just rebuild with another block mention above.

February 28th, 2007, 04:07 AM	#7
GTpwrdCapri Newbie Join Date: Feb 2007 Posts: 10	actually the sohc block could work if you feel like spending the time and money to have the machine work done to retrofit the dohc heads. but then the real wortk will be to swap the front part of the motor. i thought i read where someone tried this on another forum. the mark8 block would be you best bet i think. when they are properly buuilt the aluminum block can handle 1000hp the mark8 block were made in italy. place called teksid i believe. very goo d block from what i have read. as long as its a dohc motor it will work.why not for the 5.4 dohc!!!

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