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Wondering if a cummins 12v will fit in a 2007 Tundra ?
question Tundra and cummins 12v
- Thread starter alberta mac
- Start date
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Doubtful, the V8 is pretty tight up against the firewall. I would imagine you would run out of space up front. 12V swaps are great for full drivetrain swaps/solid axles. Not sure I would want to mess with a Tundra chassis for that swap. What are you thinking?
Ditcherman
SILVER Star
I must have the same addiction you have.
That being said, my 07 tundra frame is pretty rough, just missed the cutoff for a full frame replacement back during that recall.
So not sure I’d do it without more work.
Not sure how I’d use it, the 5.7 is so great in every aspect except gas mileage.
Seriously thought about solid axle swapping it many years ago, but as it was and still is my daily driver and work truck I didn’t have business toying with it.
I’m currently putting a 12v in a 40, and the tundra is sitting right outside the door, so if you want general measurements I could do that.
I know where there’s an 07ish just sitting with low miles that is probably cherry and my wife hates you for making this post.
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- #4
I'm trying to work out why the milage on my 07 is so bad, worse than usual and I have a 12v sitting in a truck. I think your right , too tight to fit in but if someone has done it , it would be great to see a pic !
Be advised - diesel swapping a vehicle that was not sold in the US in a diesel configuration is Federally illegal. Not that the EPA will come looking for you, but if you get pulled over on Federal property or have an encounter with the Feds through some other means and they happen to notice, it's a 10/100 sentence and they will crush your truck.
Ditcherman
SILVER Star
That’s interesting, but surely his Tundra was sold in the US?
So none of those swaps that are done in the commie states that have to jump through all the hoops to get registered via inspections etc have been done with SA or Japanese vehicles?
I could be wrong, but I'm somewhat sure that Canada echoes the US in this aspect of emissions law. There was never a 2007 Tundra sold in North America with a diesel engine from the factory and therefore swapping a diesel into a gas truck is illegal.
I looked into this a few years back for a different diesel swap candidate and the EPA agent told me that while they don't have people running around spot checking cars, and states may choose to allow vehicles that are so swapped, on *Federal* property, Federal law applies. If you are found on Federal land with an illegally swapped vehicle and have a Federal LEO encounter, you are subject to arrest and prosecution and your rig will be crushed. Since these are offroading trucks and a lot of people drive them in Federal parks...
Ditcherman
SILVER Star
Ok I figured out I read your first post wrong, I read it as “vehicle not sold in the US”, not “sold as a diesel”. Like, can’t swap an imported vehicle.
Well aware there’s no diesel tundras. Think what a hit that would be! Although on second thought there not Cummins Titans running sound all over….
I neglected to speak with an EPA agent I guess.
I wonder how many times this has happened? When they take your car and crush it do they at least put you up in a hotel?
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I'd say not. I've got 3 land cruisers - 40,60,74 and 2010 5.7Tundra. The front end on a Tundra is a rack and pinion steering monster.
The depth of oil pan on cummins requires SOA on Land Cruisers. and it's only to deal with a 4" axle tube for clearance issues.
and above about the Nissan cummins it was a V8 for some reason and my research told me to avoid that motor it has issues.
There have been several documented cases of illegally re-engined vehicles being found and confiscated on Federal land that I've seen in the last decade. And yes, they do put you up in a hotel - the gray bar hotel, aka jail.
You can do what you want, I'm not saying not to swap if you want. Just mentioning what the consequences are for breaking the law.
There is one exception to this - Cummins developed a turnkey engine swap system called the R2.8 to put in Jeep Wranglers. This it a complete diesel package that has been certified with the EPA to be legal to swap into any gas vehicle. It was specifically certified as a system for this, where it will not increase your emissions.
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Ditcherman
SILVER Star
Hoping that our conversation is not derailing this thread; I’m always inclined to let them go where they wander, especially the slower moving ones - it’s just like any other exploring. But the OP can let us know!
Anyway, I searched and only found one instance of the feds crushing and it seemed to be highly produced, intended to make people think they shouldn’t do it. Scare tactics. It also had something to do with falsifying importation papers gas vs diesel. There was what looked to be a trooper that said “not fit for our highways” and then you saw the foreign plates, which didn’t make sense.
If you had any links handy to back up the several documented cases I’m sure the community would appreciate it.
Here’s the epa guidelines for swaps, a quick read that one could argue that they are legal as long as emissions are “….not affected”, and you don’t put a “heavy duty” engine in a “light duty” vehicle.
My swap is done (12V Cummins into a 40) and I’m on to the next one. ‘94 into a ‘73, no emissions on either one.
Molon labe
ETA I’m into this because I have both 12V’s and a tundra, although when my rusty Tundra frame breaks in half I’ll be inclined to swap that engine/trans into the 40. I was just here to help with measurements and the experience of shoehorning a 12v into a 40.
What about a smaller I6 diesel?
I know this is a bit of a blasphemy - but what about the GM 3.0 duramax? I think the rear engine oil pump belt is a wildly stupid idea. But otherwise it's a pretty good design and maybe with the right deal on a wrecked donor it could be a better fit for an inline 6 diesel that's not so heavy and could realistically get 25+ mpg. Junkyard LM2 engines can be found pretty cheap - $2500-4500. I'm not a big diesel fan, but I think they are getting cheap enough that they might make a cool swap. Might be on the small end of the power range for a Tundra. But maybe for an FJ40 or FJ60 if it's possible to sort out the emissions system to make it work in those without a full DEF system. Not sure what options there are currently for a delete. I wouldn't feel to bad putting a deleted diesel like that in an FJ40 - probably still a significant reduction in emissions over a worn out 2F.
I know this is a bit of a blasphemy - but what about the GM 3.0 duramax? I think the rear engine oil pump belt is a wildly stupid idea. But otherwise it's a pretty good design and maybe with the right deal on a wrecked donor it could be a better fit for an inline 6 diesel that's not so heavy and could realistically get 25+ mpg. Junkyard LM2 engines can be found pretty cheap - $2500-4500. I'm not a big diesel fan, but I think they are getting cheap enough that they might make a cool swap. Might be on the small end of the power range for a Tundra. But maybe for an FJ40 or FJ60 if it's possible to sort out the emissions system to make it work in those without a full DEF system. Not sure what options there are currently for a delete. I wouldn't feel to bad putting a deleted diesel like that in an FJ40 - probably still a significant reduction in emissions over a worn out 2F.
I enjoy these wild thoughts, as I indulge in wild thoughts often.
- LM2s, great engine, drives good, but I think to make it work you would need to swap in the 10spd as well, I've never driven one without the 10spd.
- 1VD, I've inquired about a complete swap, $30-40k is usually where it was, it makes little sense after math, factor in repair, I just bought a supercharger and have built on it, it's now faster, just as pleasant to tow heavy and has been extremely reliable.
Now, it comes down to something that I actually think works.
BMW M57, plentiful, as it was available across 3 generation of X5's, 535Ds, 335Ds, it's connected to 8HP transmission, and the AWD version transfer case is also on driver's side, so it can line up with the front diff pretty well, 8HP is probably my favorite transmission in the world, you can make the powertrain run standalone pretty good, the ratio makes sense (E70 X5 35d has 3.64:1) that means if you got 4.30 gears then it can be pretty spicy.
- LM2s, great engine, drives good, but I think to make it work you would need to swap in the 10spd as well, I've never driven one without the 10spd.
- 1VD, I've inquired about a complete swap, $30-40k is usually where it was, it makes little sense after math, factor in repair, I just bought a supercharger and have built on it, it's now faster, just as pleasant to tow heavy and has been extremely reliable.
Now, it comes down to something that I actually think works.
BMW M57, plentiful, as it was available across 3 generation of X5's, 535Ds, 335Ds, it's connected to 8HP transmission, and the AWD version transfer case is also on driver's side, so it can line up with the front diff pretty well, 8HP is probably my favorite transmission in the world, you can make the powertrain run standalone pretty good, the ratio makes sense (E70 X5 35d has 3.64:1) that means if you got 4.30 gears then it can be pretty spicy.
I think for the LM2 to work as a conversion motor it would need a stand alone ECU so you could adapt it to something. Thinking a little bigger - the full size Duramax have stand alone options available for software. But I think they're realistically too heavy and too powerful for the Tundra unless you de-rated some. Not sure how the suspension would handle the weight either. I think the duramax v8 is 900ish lbs. I googled the 12v Cummins and it looks like it's around 1,100 lbs? Also not sure I'd want that in a Tundra. The LM2 is 472lbs - seems a lot more manageable for the chassis. Really similar to the 3UR.
The B57 or M57 might be the sweet spot though. I don't know much about those engines. But they're about 470lbs too. The B57 has one version that's nearly 400hp and 560 ft lbs. That sounds amazing for a smallish diesel I6. Would be a great fit in a Tundra if you could find one and get all the electronics sorted. If I were doing it I'd try to adapt to the Toyota transmission just for ease of conversion - shifters stay put, transfer case and all the switching stays there. Etc. But maybe use a LC200 or Sequoia multi-mode transfer case to get a real frankenstein.
The B57 or M57 might be the sweet spot though. I don't know much about those engines. But they're about 470lbs too. The B57 has one version that's nearly 400hp and 560 ft lbs. That sounds amazing for a smallish diesel I6. Would be a great fit in a Tundra if you could find one and get all the electronics sorted. If I were doing it I'd try to adapt to the Toyota transmission just for ease of conversion - shifters stay put, transfer case and all the switching stays there. Etc. But maybe use a LC200 or Sequoia multi-mode transfer case to get a real frankenstein.
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as said before the tundra engine bay is a little short and not very tall would need a very tall body lift to make it work. 1VD would be good, om606 has been done before.
There are standalone harness for LM2, the modules GMs use make things pretty easy when comes to swap, they like to modulize things.
You can buy off shelves harness that allows the LM2 drivetrain to be "standalone" LM2 diesel harness standalone harness - https://www.swaptimeusa.com/store/p58/LM2_diesel_harness_standalone_harness.html , but you would still need software and I believe you need an MDI2 (GM interface, you can buy reps online), and GDS2 (Global Diagnostic System), then you can turn things on and off.
The big Dmax aka L5x engines are good, but I don't like the 10speed with it, again, you going to need the MDI2 and GDS2 to do lot of work, beauty on our Tundra is our front axle has 9" ring gear, and 10.5" rear ring gear, that's about size of most smaller HD truck, you keep the ratio high then it'll survive, I mean Ford use 8.8 on F150 rear, so think about that.
I've never dealt with a B57, but from what I hear is it's finicky, I've touched M57 and it's DIY-friendly, not same level as 3ur but it's friendly enough that you can do most things solo with the right software, and a lot of kits are out there and has been done before, so the basics remain the same.
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