micahs97m8
Dedicated LVC Member
Is this doable or is there more complications than the heads? Someone wants to put the mark viii motor i have into an aviator, but I wasn't sure of the other differences.:shifty:
mark viii motor in an aviator?
- Thread starter micahs97m8
- Start date
wickedwhiteVIII
Well-Known LVC Member
It's doable! But why? The aviator engine has the better C heads! You'll need the aviators oil pan as well!
chris2523
93 Mark VIII
yeah i think most people go the other way.
micahs97m8
Dedicated LVC Member
I agree, but i think he's going the cheap route to get his aviator on the road. Selling the motor for $450 compared to the estimates for an aviator motor he has gotten. so other than the oil pan, this will bolt right in?
wickedwhiteVIII
Well-Known LVC Member
Yes it will bolt in , but you'll have to use the mark viii intake manifold, and I don't know if the aviatos exhaust manifolds will bolt up to the b-heads!
micahs97m8
Dedicated LVC Member
^^^that's what i was worried about. Complications related to the different heads. 
GMAN
Dedicated LVC Member
The broke Aviator motor is worth more than the Mark motor.
chris2523
93 Mark VIII
cuz that is in no way the "cheap route."
why not just rebuild the aviator motor?
$$$
why not just rebuild the aviator motor?
$$$
94m5
Dmaup's Daddy
The exhaust will bolt up fine.
unity
Dedicated LVC Member
Yup. The Aviator manifold ports are larger but the bolts are in the right place.
You may have an issue with engine mounts.
You may have an issue with oil filter location. In fact, once its installed it may be impossible to change the filter. I cant say for sure. The Mark filter is towards the back. The Aviator is out front. I could change my filter by reaching down with hood open. I can only assume there was a reason for the location change. (I had a Mark with an Aviator engine).
You might want to look up the specs of the power steering pump. The mark pump should be fine, but the gearing ratio and pressure difference may be noticeable in an SUV. I used the Aviator pump, but that was going into a coupe.
You might have to hunt down COP covers if its a 96 or older Mark engine. I would think the Aviator covers would work, but you can not be certain until you try. Best bet is to test fit them right away. I would give a 99% chance they work.
The Aviator intake is highly sought after. Sells for $300 up easily. But it will not bolt up to any Mark engine (again, because of the heads).
Oil pan has been mentioned.
racebronco2
Well-Known LVC Member
The filter is in the front on all teksids engine and as far as i know all the 4.6's.
I would think the engine mounts would be in the same location.
He will need an intake manifold if the engine is a 93-96.
The valve covers and cops will go on the 93-96 engine with no problems.
The front cover might need to be swapped over.
The cross-over will need to be swaped over.
The tb might be a problem since around 2004 it's a drive by wire, i have seen the continentals drive by wire and the bolt pattern looks the same.
Might need to get some kind of adapter to mate the fuel lines. You will need to get the returnless lines off of a 99 continental.
The fuel injectors will need to be swapped.
The egr tube will need to be modified.
I would think the engine mounts would be in the same location.
He will need an intake manifold if the engine is a 93-96.
The valve covers and cops will go on the 93-96 engine with no problems.
The front cover might need to be swapped over.
The cross-over will need to be swaped over.
The tb might be a problem since around 2004 it's a drive by wire, i have seen the continentals drive by wire and the bolt pattern looks the same.
Might need to get some kind of adapter to mate the fuel lines. You will need to get the returnless lines off of a 99 continental.
The fuel injectors will need to be swapped.
The egr tube will need to be modified.
unity
Dedicated LVC Member
Cross-over should be fine, there is PLENTY of room. And that is also true if the swap was reversed, I used the Aviator cross-over in my 96. Its tighter, but works.
Why would he need an intake manifold in either case? Being Gen one or two. I would think either would work, with a Gen II being most ideal. The intake port is on the same side as either Gen Mark.
racebronco2
Well-Known LVC Member
He might need the cross-over with two sensors, not sure if he needs both or not.
You make me wonder if you've seen the gen one 93-96 engines. First you say that the oil filter is in the rear of the engine and now the intakes thottle bodies are on the same side. I have removed at least 30 mark vii engines for the blocks, cop valve covers, gen 2 intakes etc. The gen 1's 93-96's the throttle bodies are in the rear of the engine near the firewall. I doubt it very much he would be abe to use the 93-96 intakes.
unity
Dedicated LVC Member
racebronco2
Well-Known LVC Member
Not meant to be a dick. Your first post in this thread sounds like you know what your talking about and if someone didn't know the engines in the mark's you would be giving them wrong information like where the oil filter is located. If you knew the throttle body location on intakes, then you would know why he would possibly need an intake.
micahs97m8
Dedicated LVC Member
Either way this has been very helpful. I've never looked under the hood of an aviator and the guy is interested in my 98 motor, so it is COP and the throttle body is in the right place. I'll call him tomorrow and see if he still wants it based on the short list of things that would have to be swapped.
unity
Dedicated LVC Member
Compared to the Aviator setup, the oil filter is towards the back. Anything not in the front, is towards the back. In fact, in a Mark its a known fact that replacing the filter requires a little finagling the first time, then most figure out an exit path for future replacements. The Aviator has had the PS pump more outboard and had the filter pointed forward. My thought is that the Aviator k-member *might* be an even more limited design making the filter even harder to swap. I was not sure, but I mentioned it. This is why is called a DISCUSSION board.
And I said the intake port (re-read), not the TB is on the same side. I said this to imply that either intake tube could be used. And yes, a Gen one intake would be fine in an Aviator. The engine package is more "compact" and the TB location is not a problem. But the OP just mentioned a 98 setup, so all is good with that.