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Fry Rice Specialist
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4,794 Posts
Discussion Starter #1
is the 93 mark 8 engine(manufactured late 92) is the one with the teksid block?

can't get the part number from the block because it's facing other side.

manage to get the part number from the right side head which is RF-F2LE-6C084-CB
the mileage is 120k and and selling for 350 bucks and is it a good deal? the engine is been sitting in the yard in their warehouse for at least 2 years that i have known of, in a climate control building. basically longblock minus the altenator and exhaust manifold. most of the sensors are on there.

if i'm getting this what do i need to replace? gasket etc. rear main seal? oil pan gasket?

will the 2 valve manifold will bolt on or i need the mark 8 manifold?

will cobra cam fit in there without modifications and make extra power or no?

will the Johnny Langton's front shock tower bar still fit in the bay or not?

thanks for anyone's answer and i appreciated it.
 

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The Parts Guy
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7,304 Posts
Well, I can answer a few of your questions.

It is a Teksid block.

As long as there isn't anything wrong with it, it's definitely worth $350.

You'll need a 4V intake to bolt up to 4V heads.

Cobra cams can be installed, but aren't really worth the hassle IMHO.

And I really don't see a feasible way to put a FSTB in the engine bay with the DOHC 4.6L. There just isn't much room.



-Rod
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #3
another yard have 94 mark engine with 100k on it but they want freaking 1200 bucks for it.

both of the engine comes with intake. forgot to check, is the dohc valve cover aluminium or plastic?

2 valve altenator won't bolt up to the mark 4 valve engine right?

thanks Rod for your awesome pic. from the look of it i think their is no way that i can reuse that bar in the bay.

i can use my engine mount on the engine still right?
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #4
what year is teksid block available till? 95? and 93-95 engine is more desired than the 96-98 engine right?
 

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Fry Rice Specialist
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Discussion Starter #5
guessing with the mark engine i need to run a mark 8 fan for the radiator as well to keep the heat down right?
 

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Super Moderator
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11,961 Posts
as long as your current radiator and fan are still good, you dont have to switch to the mark 8 fan.....its not really recommended seeing as how that fan is a 1-speed and will pull in excess of 80A upon your electrical system when it starts up at full throttle....the mark 8s use a variable voltage controller to gradually increase the voltage to the fan to bring it up to speed....with out this, you'll fry your alternator real quick
 

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Boom.
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5,238 Posts
Casper said:
what year is teksid block available till? 95? and 93-95 engine is more desired than the 96-98 engine right?
All Mark VIII engines are Teksid. The 93-96 are the same and the 97-98 are the same. 97-98 have COP ignition and a different (some say worse) intake manifold.
 

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The Parts Guy
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:zwthstpd: x 2

Teksid blocks were used from 93-98, and there is no need for the Mark 8 fan. I'm running a radiator and fan for a 97 4.6L Tbird in my 90 XR7, and that setup has no trouble keeping the engine cool.

-Rod
 

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Since we're talking DOHC blocks here... :D

Are all the Mark VIII blocks the same? I'm pretty sure the timing covers are different (no coil brackets on the Gen II's) and I know the valve covers are different. But what about things like crank/pistons/rods and timing chain components (tensioners).

Did they do any weird things like changing bolt hole locations, bolt sizes, etc. like they did with the SOHC block? :zbash: :2huh:
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #10
racecougar said:
:zwthstpd: x 2

Teksid blocks were used from 93-98, and there is no need for the Mark 8 fan. I'm running a radiator and fan for a 97 4.6L Tbird in my 90 XR7, and that setup has no trouble keeping the engine cool.

-Rod

this is good to know. it'll keep the cost down. looks like about 80% this project is a go.

what i'm planning is keep this engine na and hopefully the internal will stand up to the abuse in the future.
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #11
i also notice there are couple of bigger bolt side ways on the block on top of the oil pan and i assume this is the sideload bolts? the f150 4.6 engine next to it doesn't have this side bolts.

so is our 2 valve a 2 bolt mains and the mark 8 4v is a 4 bolt main?

also from search that the secondary port like to built up carbon in low miles because of no fuel present there to clean it. is it a solution to this other than took the intake off to clean it once in a while? seafoam all the time?

thanks.
 

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I think pics will be better to describe the main setup difference between the Windsor engine in the trucks and the Romeo engine in our cars. I don't have the pics and trying to word it didn't do what I wanted.
Darrin
 

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The Parts Guy
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Well, it's an old pic, but here is a picture of a 94 DOHC 4.6L. You can see the bolts going through the side of the block into the crossbolted mains.



-Rod
 

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when looking for an engine the 93-96's are usually cheaper to pickup, hotrod people seem to like the 97-98's for some reason = $$$$ . The Biggest cork I can see on the 97-98's is that I believe the throttle body/intake adaptor is pretty choked up.
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #15
if all goes well i will pickup the engine next thursday.

what to look for when i'm checking the engine right there? make sure it'll spin???
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #16
what intake choices do i have on the mark engine?

is it any beneficial to powdercoat or ceramic coating on the stock mark intake other than bling?

is the altenator is mark specific only or any of those mach 1 or marauder altenator will work on this car?

the mark also have reuseable intake manifold gasket and oil pan gasket just like the 2 valve engine right?

also from search that the secondary port like to built up carbon in low miles because of no fuel present there to clean it. is it a solution to this other than took the intake off to clean it once in a while? seafoam all the time?

can i reuse my 2 valve underdrive pulley on the mark(i guessing yes???)

will i break into the 14's with the stock mark engine in the bird with 3.73?

will the lower end feel more gutless than the 2 valve i have here in it now in the tbird?

thanks for so many question.

i'm newbie to dohc.
 

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Super Moderator
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if you get it dyno-tuned, it will have a very flat torque curve due to the IMRCs....i think its blackicelsc that posted his dyno graph of his mark 8........as long as you can put the power down to the ground effectively, the mark 8 along with 3.73s should get you into the 14s no prob.....a marauder or mark 8 TC would be a bare minimum essential as well

as far as the problem with the secondary ports with no fuel, you could always get some 03+ C heads and use a 99/01 cobra intake
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #18
is it possible the 93 mark running cop ignition?

just notice it. the engine is out from a 93 mark8 ( i've seen the body, had the driveshaft and rear lower control arm in my possesion) but i saw cop on that engine???

didn't see any coil pack on there but only cop ignition???

is the mark engine weightsd more than the 2 valver i have in there?
 

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Fry Rice Specialist
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4,794 Posts
Discussion Starter #20
i'll be there tommorrow again to have a look at it(and maybe a downpayment), or i might mistaken the cop on the 99 f160 4.6 that sit next to it.
 
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