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Old 09-26-2012, 12:46 PM   #1
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TDI Diesel Conversion?

I have been looking into the diesel conversions availible for the jeep does anyone know weather Mopar ever released that drop in conversion kit?

The TDI package looks like its going to run me 11-14K and the Mopar kit was supposed to be 12K for everything brand spankin new. I couldnt find anyhting more online about it since about 2008 so I am guessing they never released it.....

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Old 09-26-2012, 03:28 PM   #2
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If you're talking the TDI from VW, I don't think it would give enough umph to adequately perform in a Wrangler.

If it's something from Mopar, then I don't know anything about it.

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Old 09-26-2012, 03:33 PM   #3
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I have often wondered about a diesel, great milage, lots of torque,low maintenance....did I mention great milage?

It's not an option that I would pay $10,000+ for though
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Old 09-26-2012, 03:42 PM   #4
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You might check out this site for some good 4bt info. That's the route I would do until something better suited for the TJ comes along.

Cummins 4BT & Diesel Conversions Forums
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Old 09-26-2012, 05:36 PM   #5
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You might check out this site for some good 4bt info. That's the route I would do until something better suited for the TJ comes along.

Cummins 4BT & Diesel Conversions Forums

Problem with the cummins conversion is every site i have gone too says minimum 4 inch lift required and around 18K total cost. The TDI has a chip to make it 250hp and 352 ft lbs of tourqe or somethin crazy like that.

You can do the TDI conversion for alot less but you would have to fab alot of the mounts yourself there is a company that makes them all premade it even uses the standard jeep tranny. but they are charging a premium for them. the engine you can ebay for around 1,000 bucks.

Info on the mopar diesel here:

Jeep Diesel Engine Swap - Diesel Tech - Diesel Power Magazine

Mopar to offer Diesel Swap kit for Wranglers - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com

and the TDI page here:

HPA Motorsports Inc. VW TDI Powered Jeep

I plan on keeping this jeep for a long time and modding the heck out of it so spending 10-12K making it diesel isnt really too screwey to me. heck it would cost me 12k to but a 2005 I6 lol
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Old 09-26-2012, 06:07 PM   #6
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I am on my second Dodge/Cummins diesel truck.

I had a 92 for just over 250,000 miles and only had to replace the water pump.
I have a 2001 with the Bosch injection pump. The engine is great, but the Bosch injection is absolute junk! Well known problem and no solution.

I have replaced mine twice and they are expensive, to the tune of $1200 to $2500 wholesale exchange. They last about 90,000 miles before they are toast.
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Old 09-26-2012, 06:31 PM   #7
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If you're talking the TDI from VW, I don't think it would give enough umph to adequately perform in a Wrangler.

If it's something from Mopar, then I don't know anything about it.
I've owned two different VW TDI's right before my Jeep. The ALH motor might be a little under powered, especially since they are slow turning even turbo'd. The PD diesel motor that comes in the 04-05 Passat will definitely move it. I had an '05 Passat Wagon, lowered on the stock 17's and had it tuned locally. That thing would move out with no issues and get 27 mpg's in town. That is really good for a full size wagon. Only reason I got rid of it and got the Jeep was I ripped the tranny cross member off looking at mount land up here & it was going to cost a few grand to fix.

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Old 09-26-2012, 06:37 PM   #8
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Old 09-26-2012, 07:37 PM   #9
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I wanted to install a Mercedes-Benz 3.2L I6 out of a 05-06 E320 CDI in my jeep. It has 205hp/370ft lbs tq. For the price of just the engine, I could do a Chevy 5.3 swap. Since ive already put 20k on my Jeep this yr, I think I'm just going to sell the Jeep and get the car the diesel comes in! they get 37mpg
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Old 09-26-2012, 08:24 PM   #10
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I researched a lot on this topic last year

A tdi is expensive and in stock firm it's whimpier than a 4.0
However with minor mods its a lil powerhouse plus it's fuel efficent
A great deal of power can be gain by getting the tdi computer flashed
From everything I read from hpa motor sports who offers $15,000 turn key models only the ax-5 transmission is useable

Mercedes diesel 5 cylinder
I like the om617
In stock form its weaker than a 4.0
But......I'm told the stock turbo and waste gate is only running 4-6psi and stock internals can hold 50 plus psi
Om617's on eBay run about $1500-$3000 and there's more transmission options

Another option is the international scout Diesel engine whiz I think is a Nissan sd33,another weaker than a 4.0 but has potential
And there's a few on eBay now around the $3000 range for engine and drivetrain
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Old 09-27-2012, 06:39 AM   #11
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Some day I'm going to have a 6bt in both of my rigs. It is a heavy engine but it makes up for it in hp/tq.

A couple fun vids.



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Old 09-27-2012, 11:43 AM   #12
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The main reason I would be switching to diesel is for torque and mileage.
Just based on what I have found online the TDI conversion people have been reporting 27-34 mpg. The 6bt conversion ppl are actually expierienceing a loss of fuel econamy due to all the other modifications you have to make to get the engine in there and the weight. If I was just offroading with it I would probably go with the 6bt but in this case as a DD I am really heavily leaning on the TDI.


So I am guessing Mopar never released the diesel conversion they had been testing.
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Old 09-27-2012, 02:28 PM   #13
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Originally Posted by James 98TJ View Post
The main reason I would be switching to diesel is for torque and mileage.
Just based on what I have found online the TDI conversion people have been reporting 27-34 mpg. The 6bt conversion ppl are actually expierienceing a loss of fuel econamy due to all the other modifications you have to make to get the engine in there and the weight. If I was just offroading with it I would probably go with the 6bt but in this case as a DD I am really heavily leaning on the TDI.


So I am guessing Mopar never released the diesel conversion they had been testing.
I understand the point about torque...plus Diesel is flat out fun. But $10K-$12K for the conversion makes for a looooong ROI on fuel savings (milage).
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Old 09-27-2012, 03:03 PM   #14
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Originally Posted by crallscars
I am on my second Dodge/Cummins diesel truck.

I had a 92 for just over 250,000 miles and only had to replace the water pump.
I have a 2001 with the Bosch injection pump. The engine is great, but the Bosch injection is absolute junk! Well known problem and no solution.

I have replaced mine twice and they are expensive, to the tune of $1200 to $2500 wholesale exchange. They last about 90,000 miles before they are toast.
Agreed,, that same pump is used in the Liberty CRD, complete junk. . Nice how it failed at 94,000, only 24k after the warranty..after that I had enough and sold it. VW diesels? I considered the TDI for a very short time.. Once you chip them up to adequate HP and torque to propel the TJ, just kiss longevity of that motor in half, plus every 70k replacing the timing belt.. On top of all that, diesel where I live is consistently 40 to 50 cents more per gallon than regular gas.. The Cummins 4bt looks good on paper. The thing has nearly twice the torque of the I-6 4.0. Worth the minimum 12k upgrade? Yes , less than a new jeep, and maybe a fun toy, and twice the mpgs, but that's about it. I'd have to hear first hand from some one that used one for long range excursions, before seriously considering any diesel swap..
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Old 09-27-2012, 03:56 PM   #15
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I would be running Bio Diesel from a local farmer at 2.19/gal which would cost 43 dollars per tank of fuel (est at 20gal for ease) would get me 600 miles aprox. If i stay gas im lookin about 90.00 to fill it (using the 20gal method) (gas here is 4.50 per gal)

The estimated fuel savings using the 20 gal tank and driving 12K miles per year would be around 3600 so 3.5 yrs to pay for itself if it cost 12,000 to switch

** Math on above savings**

20gal at 2.19 = 43.80
20gal at 4.50 = 90.00

the TDI conversion ppl have been reporting on average 30mpg my 4cyl now gets around 12mpg so 600 mile range on diesel per tank 240 mile range on gas per tank using the 20 gal tank. Driving 12K per year it would cost me 876.00 in diesel at 2.19/gal (12K divided by 600 = 20 fill ups per year times 43.80 per tank = 876.00 reuse for gas cost) and gas would run me 4,500 per year at 4.50/gal which equals the 3600 savings per year.

I understand this wouldnt be the same for everyone since they wouldnt be getting biodiesel for that price. and please feel free to correct my math if i completly messed it up. (completly possible lol)
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Old 09-27-2012, 04:01 PM   #16
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4bt swaps are not 18k lol.

More like 5k if you do it yourself, they are mechanical motors (no wiring) and have great durability and mileage.

Thatd be the hands down best swap, the TDI would be the last swap id do. I'd know, I have a Cummins powered CJ
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Old 09-27-2012, 04:05 PM   #17
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4bt swaps are not 18k lol.

More like 5k if you do it yourself, they are mechanical motors (no wiring) and have great durability and mileage.

Thatd be the hands down best swap, the TDI would be the last swap id do. I'd know, I have a Cummins powered CJ

18k -22K was the quoted price from the company that does the 6bt conversion
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Old 09-27-2012, 05:40 PM   #18
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Originally Posted by James 98TJ

18k -22K was the quoted price from the company that does the 6bt conversion
6bt CRD maybe.

I cant see any costs being more than 10k even with the big 6bt, but they must be charging a ton for shop fees.
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Old 09-27-2012, 05:43 PM   #19
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I am currently putting a om617 out of a 1980 Benz 300d it is the 3.0L 5 cylinder turbo diesel...

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Going to be running about 25lbs boost looking at about 400hp+ and 650trq+ after complete rebuild and triple layer copper and stainless head gasket, it is going in a 59 cj5 with GM Turbo 350 trans and Dana 300 t-case.....
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Old 09-27-2012, 05:44 PM   #20
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I am currently putting a om617 out of a 1980 Benz 300d it is the 3.0L 5 cylinder turbo diesel...

Going to be running about 25lbs boost looking at about 400hp+ and 650trq+ after complete rebuild and triple layer copper and stainless head gasket, it is going in a 59 cj5 with GM Turbo 350 trans and Dana 300 t-case.....
That is one small turbo lol. Whats the exhaust inlet size on the turbo? 6cm?
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Old 09-27-2012, 05:51 PM   #21
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Yep but going with new garrett turbo....
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Old 09-27-2012, 06:20 PM   #22
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Yep but going with new garrett turbo....
Just keep that one on there and twin it with the garrett.
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Old 09-27-2012, 06:44 PM   #23
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4BT looks to be a better fit, both price and ease wise. Lots of swaps have already been done, and lots of info readily available.
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Old 09-27-2012, 07:38 PM   #24
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Originally Posted by James 98TJ
I would be running Bio Diesel from a local farmer at 2.19/gal which would cost 43 dollars per tank of fuel (est at 20gal for ease) would get me 600 miles aprox. If i stay gas im lookin about 90.00 to fill it (using the 20gal method) (gas here is 4.50 per gal)

The estimated fuel savings using the 20 gal tank and driving 12K miles per year would be around 3600 so 3.5 yrs to pay for itself if it cost 12,000 to switch

** Math on above savings**

20gal at 2.19 = 43.80
20gal at 4.50 = 90.00

the TDI conversion ppl have been reporting on average 30mpg my 4cyl now gets around 12mpg so 600 mile range on diesel per tank 240 mile range on gas per tank using the 20 gal tank. Driving 12K per year it would cost me 876.00 in diesel at 2.19/gal (12K divided by 600 = 20 fill ups per year times 43.80 per tank = 876.00 reuse for gas cost) and gas would run me 4,500 per year at 4.50/gal which equals the 3600 savings per year.

I understand this wouldnt be the same for everyone since they wouldnt be getting biodiesel for that price. and please feel free to correct my math if i completly messed it up. (completly possible lol)
Like I said, it looks great on paper, but I have searched everywhere and haven't found a single post anywhere from a real world owner/driver of one of these TDI conversions... HPA has been doing these conversions now for a couple of years, yet we aren't hearing from anyone actually using the conversion. The same can be said of the 4BT conversion people, other than a couple of vids on YouTube telling us how cool the conversion is.. BTW, I hope the taxman leaves you alone for using non-road taxed biodiesel.. Getting caught is not fun, and the fines are horrendous .. Nonetheless, I'd love to hear from some TJ owners that have done either of these conversions... Nothing would be worse than dumping 10 to 15 grand down a hole..
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Old 09-27-2012, 07:50 PM   #25
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Like I said, it looks great on paper, but I have searched everywhere and haven't found a single post anywhere from a real world owner/driver of one of these TDI conversions... HPA has been doing these conversions now for a couple of years, yet we aren't hearing from anyone actually using the conversion. The same can be said of the 4BT conversion people, other than a couple of vids on YouTube telling us how cool the conversion is.. BTW, I hope the taxman leaves you alone for using non-road taxed biodiesel.. Getting caught is not fun, and the fines are horrendous .. Nonetheless, I'd love to hear from some TJ owners that have done either of these conversions... Nothing would be worse than dumping 10 to 15 grand down a hole..
I can safely say that my 4bt in my new CJ on 37"s gets better fuel mileage than my 2.5l on my old TJ on 31"s.

Then again both 4 cylinders, but totally different tire sizes, weight and torque and power ranges.
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Old 09-27-2012, 07:55 PM   #26
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With the 4bt cause of the lower rpm you need numerically lower gears

Like 3.07 and 3.73 to keep highway speeds
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Old 09-27-2012, 08:24 PM   #27
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Originally Posted by IndyJeepMan

I can safely say that my 4bt in my new CJ on 37"s gets better fuel mileage than my 2.5l on my old TJ on 31"s.

Then again both 4 cylinders, but totally different tire sizes, weight and torque and power ranges.
Yes the 4bt is the only conversion I would consider,, 3:07s with 33s should keep the RPMs near the center of the power band at 65 mph. Roughly 1600 RPMs. How long ago did you do the swap? What kind of MPGs do you get? And in all honesty, would you get into it and feel comfortable enough or confident enough to drive it long range, do some heavy back country excursion wheelin and drive it back? All without going prematurely deaf? I'm really curious about this, as in a few short years it's going to either be the 4BT, or a Chevy LS series V8...
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Old 09-27-2012, 08:29 PM   #28
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What about a Toyota 1KZT-E 3.0l? I realize parts would be stupid hard and expensive but its a powerful motor for the size. Diesel toys in san Antonio does this swap into TJs and I think JKs
Jeep JK/TJ Diesel Conversions
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Old 09-27-2012, 08:40 PM   #29
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What about a Toyota 1KZT-E 3.0l? I realize parts would be stupid hard and expensive but its a powerful motor for the size. Diesel toys in san Antonio does this swap into TJs and I think JKs
Jeep JK/TJ Diesel Conversions
Honestly, going with a known swap is going to be your best bet. Cummins is renowned as the one of, if not the best engine producers in the world. And there is a very large dealer network that will have plenty of parts in stock anywhere you go.
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Old 09-27-2012, 09:23 PM   #30
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this diesel idea sounds pretty neat

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