3.8L to 4.6L engine swap - TCCoA Forums
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post #1 of 12 (permalink) Old 07-09-2017, 12:05 AM Thread Starter
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3.8L to 4.6L engine swap

I am a new member and am just learning my way around the site.

I have a 96 TBird with a v6 engine. My plans were to begin an engine swap next summer but I got a pleasant surprise when, as I was driving to my grand daughters lacross game, the engine heated up and I think warped a head. I was not too concerned as this is not my daily driver. Never-the-less, I may be looking at doing the swap this year. Woo Hoo!!!!! The engine I will be using will be out of a 2006-2007 Lincoln MarkVIII with a vin code of V.

I know I will need the following:
engine compartment wiring harness,
the brain,
Motor mounts ???,
Radiator ???,
Fuel Pump,
Struts - Front,

I may want to swap out the front disc breaks with something new for the Lincoln.

My question to the members: when I drop the v8 in, what other components will I need.

Last edited by Gasman1951; 07-22-2017 at 02:14 PM. Reason: I don't know if this is the correct way to reply, so I will do so until someone tells me otherwise.
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post #2 of 12 (permalink) Old 07-09-2017, 10:11 AM
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The Tbird never came with a 3.5, you have a 3.8. The MarkVIII was only made from 93-98. The MarkVIII had air suspension, so the front shocks won't work on your Tbird.

What exactly do you have, and what exactly are you looking to do?
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post #3 of 12 (permalink) Old 07-09-2017, 11:11 AM
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I hope he doesn't have the Fwd continental but I don't know if that came with the 32v motor, I'm lost to what this guy may have .
But for the time and effort the swap takes in my opinion it's only worth it to swap to a 32v motor or just sell what you have a bit a v8 bird,they are dirt cheap I see good clean ones go for 1000-3000$.
Good luck
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post #4 of 12 (permalink) Old 07-09-2017, 12:19 PM
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The only Lincoln with the 4.6 in 2006/2007 is the Town Car(Panther platform)

I'm with badbird, if going through the trouble of transplanting a V8, you might as well go with the 4V or the real smart move would to be buy a V8 Tbird.

Unless you want a project....Then keep in mind, the V6 and V8 Tbirds have different length driveshafts as well as a 7.5" differential vs 8.8".

The 3.8 and 4.6 bellhousing is also different.
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post #5 of 12 (permalink) Old 07-09-2017, 12:27 PM
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Continental ended in 02 so it couldn't be that either. Whatever it is I agree with everyone else that you may find an engine that will fit but you'll still need to source dozens of major parts for the engine to actually move the car. V8 swaps into 96-97 V6 Thunderbirds are fairly easy, IF you have a 96-97 V8 Tbird as a doner.

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post #6 of 12 (permalink) Old 07-10-2017, 06:03 AM
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Quote:
Originally Posted by MadMikeyL View Post
The Tbird never came with a 3.5, you have a 3.8.
Thread title fixed.

Joe
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post #7 of 12 (permalink) Old 07-13-2017, 10:18 AM
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I'll post my usual reply to these threads: add an 8.8 rear diff to the list. The spindly 7.5 diff won't be adequate for a V8.

And I agree with above, just sell it and buy a V8 Bird. It will be easier and cheaper in the long run.

Al
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post #8 of 12 (permalink) Old 07-22-2017, 02:35 PM Thread Starter
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Thanks for all the feedback especially about the rear end and bell housing.

This is a project car and I am the 2nd owner and the car is in really good shape. I am looking to upgrade to a 4.6L 32v Vin V engine and transmission and rear end to match. I don't think I will find a T-bird set up like this on the open market. Therefore the comments about the Mark VIII. I found out that the 1996 - 1998 Lincoln Mark VIII has one and I can find good used ones somewhat readily available. What I don't know is the difference with the through 2/3/97 and from 2/4/97 indicators. If someone could shed some light on that I would greatly appreciate it. I may be better off getting the 1998 model year.

I am primarily seeking feedback of what components I will need to change out to get this girl running after the build-up. As I go further into this, and since I don't have a donor, it does appear that selling and buying a V8 model would probably save me money in the long run as noted by T6Rocket and 94Badbird. Definitely something to think about.

Any and all feedback will be greatly appreciated.

Last edited by Gasman1951; 07-22-2017 at 02:51 PM. Reason: Providing more info.
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post #9 of 12 (permalink) Old 07-22-2017, 10:13 PM
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Hey Gasman,
I have yet to do a V6 to V8 swap. I have done a SOHC to DOHC swap. I can imagine that the wiring from the PCM to the engine will be the biggest hurdle. The V6 PCM and wiring is different than the V8 and the Mark VIII PCM is in a different location than the Tbird. I believe it can be done but... Gear up, you will need space, time, energy, resources, patience and money.
As far as finding a Thunderbird with like you described, you might be surprised if you are patient. Back in February I was looking for clutch petals to do a manual swap. Well, I'll be dog, some body listed a Thunderbird that had everything done just the way I had dreamt. He put in a Tremec 3650 from a 07 Mustang, and even had the dip switch dialed in to work the cruise control. While driving it home I had forgot that I was driving a manual car and when I slowed down I had to remember to down shift. That was a great road trip. The guy who sold me the car asked, " You know what help me give up my addiction to MN12s, MY NEW GT350 Mustang!!!". Then we went for a ride. Oh, yes
Read ya later, Nick
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post #10 of 12 (permalink) Old 07-24-2017, 07:09 PM
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Grab a EEC, EEC harness, and engine harness from a '96-97 4.6L MN12. Swap the EEC and EEC harness in place of your V6 parts. Fit the 2V engine harness to the 4V. Tune the EEC and let her rip.
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post #11 of 12 (permalink) Old 07-25-2017, 05:05 PM Thread Starter
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Thanks wildturkey & racecougar. Since I am wanting the 32v from a MarkVIII, will the harness from a 96-97 markVIII be beneficial or should I just modify the harness from a v8 bird?
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post #12 of 12 (permalink) Old 07-25-2017, 06:24 PM
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It wouldn't hurt to have it to rob connectors from, but you'll still want to modify the 2V harness to fit the 4V.

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