You can do it, too: Convert a Toyota 4runner to diesel, then to veggie oil
Interested in a Toyota 4Runner but wish it had a diesel powerplant? In the U.S., your engine options are limited to a 4 liter V6 or a 4.7 liter V8 (and you don't get the V8 in all states). But, if you're not in the U.S. and buying a Toyota Hilux Surf (i.e., a 4Runner with a different name), then you can opt for a diesel engine. Since a diesel engine is made for this vehicle, AutoblogGreen reader Mark G. had an idea. He wrote in to tell us about how he went about taking his 1999 U.S. 4Runner into a diesel SUV (importing an engine from Japan), and then had the engine converted over to run on veggie oil by Diesel Toyz. He writes:
Everything is completely factory in appearance and function. I now am getting 35+ mpg in a Toyota 4runner with 4wd that I used to get 15mpg. I am also now running on a waste product like waste vegetable oil. The ridiculous thing is that the rest of the world gets these vehicles standard, we have to pay to convert them.
That's quite a jump in miles per gallon, but we know that diesel get inherently more mpg than petrol engines. I've asked Mark how much these conversions cost him, but suffice to say this is one way to get the car you want to run on the fuel you want.
UPDATE: Mark responded:
The conversion including engine, trans, wiring, gauges, and labor to install was around $15k. They gave me all of the gas engine etc back and I sold them on eBay and recouped approx. $2500. The vegoil conversion added another $3k onto the price. Absolutely the most honest, straight-forward guys I've ever dealt with.
[Source: Diesel Toyz]
Reader Comments (Page 1 of 2)
Phil L. 11:22AM (10/07/2008)
Cool project - but not likely legal in most parts of the US, even if you can twist some regulations or simply game the system.
That said, you can probably get away with it except in states with heavily-enforced emissions laws (California, et al.).
Hmmmm - Has anyone looked into similar projects with small car (not truck) diesels that are readily available in Europe, and share platforms with models in the US?
Warning: The Diesel Toyz web site is thoroughly annoying; goofball graphics design causes some browsers to black out text.
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jim 10:20AM (10/08/2008)
The difficulty with small cars is that most are FWD with transaxles. Body on frame trucks with RWD or FWD provide a simpler platform to engineer an engine swap. One they have more room in the engine compartment. The engine, transmission, transfer case in for 4WD and axles are all separate units. The first problems you need answers to are, does the engine and transmission bolt together seamlessly or do you need an adapter and can the replacement engine use the same motor mounts?
Assuming you need an adapter, the engine can slide forward (which may create other problems) to compensate for the thickness of the adapter plate and if new motor mounts are needed the existing ones can be cut off and new ones fabricated.
I am aware of people investigating the conversion of NAS VW Eurovans to diesel using parts from diesel versions of the van that is sold in Europe. It turned out that there were significant differences in the gas-diesel versions that precluded an easy swap. The same maybe true for many FWD cars.
4Runner Rick 3:36PM (2/23/2009)
Phil, with all respect, you're talking through your hat. Last year I purchased a 4Runner that was converted to a diesel engine at a small dealership in Tennessee called National Auto Warehouse. I brought it home to California and the registration was no problem: I pulled in to the inspection lane, the guy came out, looked at the engine, said, "Yup, that's a diesel," and that was it. Any used diesel vehicle purchased out of state with over 7,500 miles can be registered in California. They will not allow new diesels to be sold (changing in 2009 with so-called clean diesel engines), but the have to allow used diesels. Also, they understand that people sometimes change engines in their vehicles, sometimes from gas to diesel. This is legal and allowed.
Phil L. 10:05PM (2/23/2009)
4Runner Rick -
Very interesting. Based on some things I've seen on-line (like http://www.jagsthatrun.com/Pages/Chevrolet_S-10_V-8_Smog.html and similar), I was under the impression this was much more difficult.
Question: Does this also apply if the vehicle in question was never offered in the US with a diesel engine option?
BoneHeadOtto 11:43AM (10/07/2008)
yeah cool project but if you care about efficiency why not do this with a smaller car? This 4-runner also is likely to have illegal emissions.
Personally the diesel that would be perfect IMO is the VW GTD. Basically a diesel GTI. All the sport look and handling (minus acceleration) plus excellent mileage.
Honda and Toyota are planning to bring diesels to the states soon from what i hear. Now if we could only get that diesel price down or replace it with homegrown biodiesel.
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Todd 1:33PM (10/07/2008)
Hey there guys.. I was told to check out this posting. Ask away
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Phil L. 2:10PM (10/07/2008)
Todd -
Thanks for checking in here at AutoblogGreen!
So... The first obvious question is: Is it legal in the US?
Depending on what state you live in (as well as federal regulations), it's my understanding that, in general, you can't retrofit an engine in a car for which that engine wasn't originally certified. So: You can retrofit a diesel into a vehicle if some versions of that vehicle came from the OEM with a US-legal diesel. Installing a non-US-spec diesel - particularly when that engine hasn't met US standards in years - looks like it would be a problem.
My state (MD) isn't as emissions-tough as CA - but my emissions notifications already know what fuel my car uses. I don't know what would happen if I show up at the emissions inspection station with a diesel when my paperwork says I should be burning gasoline. How have the conversions you've supported dealt with this situation?
I'll also extend the question I alluded to above: Do you know of people who have performed similar conversions on cars, particularly some of the smaller European diesels we don't get in the US?
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daniel 2:58PM (10/07/2008)
This diesel engine is great, i've driven several when I was abroad in Oz, great power and even better fuel economy. Its nice that he had it converted, but technically it isnt street legal ANYWHERE in the United States, as per federal law.
State emissions/registration laws aside take second fiddle. Even in Florida where there isn't a mandatory emissions inspection, its technically illegal federally.
See this bureaucratic, poorly researched and biased document from the EPA that is still in effect for over 17 years... -> http://www.epa.gov/compliance/resources/policies/civil/caa/mobile/engswitch.pdf specifically the middle of page 2
I love how relevant the cars used in examples are, Pontiac Grand Am with Olds Calais... ha
another link
http://www.halfbakery.com/idea/Gasoline_20to_20Diesel_20engine_20conversion
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Todd 3:52PM (10/07/2008)
Well, after hiring lawyers (ouch$$) and lengthy conversations with EPA officials, and 5+ years doing conversions, the legality is one big grey area. What I have been told (grain of salt) is that since diesel engines have historically not had an emissions inspection (tailpipe test) other than an opacity test, even if the engines [u]were[/u] inspected, they'd pass by default. You have to be operating an engine that is out of compliance (blowing opaque smoke) to get in trouble. Just because the engines are not certified for use in the United States just means that they have not been tested. For someone to prosecute you, you'd have to be in violation of emissions compliance for the year/make/model of vehicle. Since diesels had none for the year models we convert = another grey area. From what we were told, the laws largely outline vehicles which use catalytic converters (gas engines). Since they wouldn't want you taking out a 4 cylinder and replacing it with a v8 gas hog thereby bypassing emissions standards for that year/make/model. We are not importing the engines so we are not responsible for them. We have the customer provide us with the engines and we install them. Contrary to what we previously thought, CA is one of the easier states to register a diesel conversion. We have 5 of them running around CA and each customer has reported no issues registering them or driving them. I know companies that make their living stuffing heavy duty cummins engines into Jeeps and this is just as big of a grey area as anything we're doing. In the 5+ years of doing these conversions, we have had no customers running into legal problems.
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Brian 8:22PM (7/04/2009)
Todd: sounds like you have a shop. Where you located and a phone #...thanks, Brian
Todd 8:24PM (7/04/2009)
Dieseltoyz.com
why not the LS2LS7? 6:35PM (10/07/2008)
Autobloggreen ran a good article on how converting to vegetable oil is false economy. All the money you save you just give back in repairs. And besides, it's illegal in the US (tax evasion).
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JamesWB 9:04AM (10/08/2008)
Would it not be cleaner and much cheaper to convert the existing engine to run on CNG/LPG?
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jim 10:26AM (10/09/2008)
GM did that in the late 70's and early 80's with a 350 cid diesel that was developed from the 350 cid V8 whose engine family will forever be known as the small block Chevy.
That diesel was so bad that it pretty much destroyed the reputation of diesel engines in passenger cars.
JamesWB 12:04PM (10/09/2008)
What? That has nothing to do with what I said.
Roverguy 11:01AM (10/08/2008)
Land Rover guys have been doing this for years. Land Rover has a 4 cyl diesel that gets 25 + mpg in a 4,000 lb truck compared with maybe 15 MPG with the small gas V8. Conversions can be done for under $10K and with used parts and lots of hands-on maybe as little as $6K. Many people in the Land Rover community have been using Veggie with great success. Each state is different but for many it's not a problem including Colorado because the emissions are lower.
As for LPG lots of kits from the UK to do that and a few have converted but no MPG increase just fuel savings. Running Veggie has the fastest payback.
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JamesWB 4:46AM (10/09/2008)
How does it have the fastest pay back if you are spending $6k+ on the conversion? Not to mention you have to add heated fuel lines/filter or risk causing serious damage to the engine (especially the injector pump).
Penina 6:00PM (10/12/2008)
Maybe one way to look at this is as yet another direction to look.
It does seem like a rather super-human effort (and kudos to you, Mark, for taking this idea the full distance). Any idea that means we don't throw away one pile of metal, plastic, etc. to chase after another slightly-more-fuel-efficient pile of metal, plastic, etc., allows more regular folks stay mobile and eventually cross the bridge to ... could it be? ... fuel independence.
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Bob 4:02PM (12/18/2008)
So let me get this straight, this article explains how a guy spent $15,000 for a diesel conversion + $3,000 for a veg oil conversion - $2,500 for his old motor for an out of pocket total of $15,500 on an already 10 year old truck.
And that money was spent so he could get approx 20mpg better fuel economy?
Even at $3-$4 a gallon won't he need to put on like an additional 80,000 - 90,000 miles just to break even? And that doesn't account for any additional repair fees from this crazy setup.
I don't really see the payoff here.
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4Runner Rick 3:40PM (2/23/2009)
Here's the payoff: I can make my own fuel. Can you?
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