To Stroke or not to stroke ...diesel? 4.0

[TwoFeetDeep]

I really want to do a diesel conversion.   My 04 Jeep TJ Rubicon 4.0 has about 290k kms on it and its got a bit of a tick.   I could pull it and stroke it (no idea of cost) or I was thinking that I could drop in a diesel.   The 4BT sounds like its hard to find and a bit heavy for the stock set up.   Then there is the VW Diesel ...and that is under powered.   I dunno what to do.   I could send the motor away and stroke it but am curious on price.   That or if I can find an iline 6 with super low km's then I might just pop a new one in.   Anyone got any low km 4.0's out there.   Be nice to put a new odometer to match the motor too!

Input please

[Ratchetstrap]

I've also thought about a diesel engine swap in my TJ. The VW TDI is a popular option in the Samurai but I've never seen one in a TJ. I'm not sure (personally) about a 4BT swap. IMHO the difference in power isn't worth the sacrifice in extra weight and all the work.

Stock 4 liter = 190hp   235ft/lbs
4BT = 105hp   265ft/lbs

Although a Cummins powered Jeep would be totaly bad a$$!

[Black Betty]

I haven't yet heard of a 4.0 that doesn't have a tick

290,000km?  You are just getting it broken in.  Jensen's cousins XJ is bound to be at 600k by now.

Are you doing this work yourself?  Paying someone to do it?  It takes a lot of work and knowledge to swap in a new drivetrain into your jeep, and at that, you still have a used engine.   Strokers are nice, but most require premium fuel and are again, not cheap.

What is your reasoning behind an engine swap?  More power?  Better fuel efficiency?  Neat factor?

And don't forget about the liberty 2.8 deisel.

[cLAY]

There is huge aftermarket support for TJs. I would look thru advance adapters website and see what grabs your attention. Lots of V8 options as well.

That new V8 Cummins they are putting in the Nissan would be pretty cool.

[morerpmfred]

What about these guys?  http://www.cotybuilt.com/hardware.html
50 pounds lighter then the four cylinder. About same power band as the four liter. Gets up to 35 mpg on the highway and they are from the Vancouver area.

[EEP]

I really want to do a diesel conversion.   My 04 Jeep TJ Rubicon 4.0 has about 290k kms on it and its got a bit of a tick.   I could pull it and stroke it (no idea of cost) or I was thinking that I could drop in a diesel.   The 4BT sounds like its hard to find and a bit heavy for the stock set up.   Then there is the VW Diesel ...and that is under powered.   I dunno what to do.   I could send the motor away and stroke it but am curious on price.   That or if I can find an iline 6 with super low km's then I might just pop a new one in.   Anyone got any low km 4.0's out there.   Be nice to put a new odometer to match the motor too!

Input please

If it isn't ticking that's the time to get worried LOL.

[JackstandJohnny]

Run some Rotella diesel oil that will quiet her up

[TL-Iguana]

Run some Rotella diesel oil that will quiet her up

The stuff with the Zinc in it?

[JENSSEN]

Kevin was by Friday and the ol'DD was doing good

[w squared]

The stuff with the Zinc in it?

You don't need zinc. just belt dressing.

[Bnine]

These guys are the simplest and one of the most afordable options.

This and a set of gears and you wouldnt recognize your rubicon.

https://www.golenengineservice.com/engines/jeep/4-6270hp-jeep-long-block

[hamrtime]

at some point you'll regret punting your 4L

offroad -
dont see any advantage of a diesel, tj pointing
up on a "slick" hill 4.0L - low range - tires aired
down - locked and all you can do is spin the tires,
your not going up cause vehicle is too light, there
is not enough downward pressure [weight] to compact
earth below your wheels so you spin on it ..

what would make a difference in above scenario is a
300hp chevy V8 and taking a run or two at it

maybe a diesel with superlow torque in moab be good
but not here


resell -
fab'ing in a foreign eng will co$t you and
if you decide to sell later it might be turn
off to most potential buyers


fuel econommy -
whats the price of diesel these days, and who
cares about fuel economy


keep the 4L, once its about to go on life support
then mod it and u be better off on all things that
matter in my opinion

[Bnine]

offroad -
dont see any advantage of a diesel, tj pointing
up on a "slick" hill 4.0L - low range - tires aired
down - locked and all you can do is spin the tires,
your not going up cause vehicle is too light, there
is not enough downward pressure [weight] to compact
earth below your wheels so you spin on it ..

lol, more weight = harder to climb. Not easier.

Your logic is backwards.

[hamrtime]

you could be right, i am equating traction to friction ,  friction being the force
that pushes two objects together [ weight of jeep being 1, greasy hill being 2 ]

if i have the power to go up the greasy hill but all 4 wheels locked just spin then I am still
thinking I don't have  enough friction.

consider if i put a tire chain in my example, i believe i'd have better chance crawling
up the hill as chain reduces the contact surface the tire had but increases the
friction cause the downward force is now the small chain cross link.

obviously more weight only works if engine power/weight ratio remains good, 4L in
20,000 jeep wouldn't move, don't think the  diesel will do any better

the tires we put on our little jeeps are often too stiff ,
a single 33" mud tire [like bfg] can hold up around 2500lbs safely, its made for the  corner of
a 4500 lb pickup, my yj weighs 2900 lbs so 1 tire could probably hold its entire weight
up , even with single digit air in them they got alot of sidewall - like a balloon

something to think about else we might need someone to do the math lol

http://www.school-for-champions.com/science/friction_equation.htm

[Dingleberry]

Mmmmm Bill is correct here, lighter  is better than heavier... Do you have your calculations warped?