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Posted: 2/11/2021 2:25:51 PM EDT
What manufacturer produces the best diesel engine. "BEST" means most reliable , longest lasting, ease of maintenance , etc.  VS ( and not interested in ) highest HP, easiest to modify/tune , ultimate performance  etc.

Don't care about vehicle type / platform. Car, SUV, truck..... doesn't matter. Don't care about high tech features , fancy interiors , etc. Just who puts the best diesel engine in their product to get from point A to point B reliably  with as little fuss or concerns as possible.

Link Posted: 2/11/2021 2:28:43 PM EDT
[#1]
under current production?

impossible to say. none of them have been around long enough to know.

historically.

this little motor.



I see these things with 300k plus miles, all the damn time. weekly. I have one in the shop now getting a window regulator.
Link Posted: 2/11/2021 2:29:10 PM EDT
[#2]
International Harvester
Link Posted: 2/11/2021 2:30:27 PM EDT
[#3]
Typically the Cummins engine will last longer than the shitbox it's installed in.
Link Posted: 2/11/2021 2:31:19 PM EDT
[#4]
CUMMINS 5.9 because 5.9 CUMMINS is 5.9 CUMMINS

You CUMMINS?
Link Posted: 2/11/2021 2:31:46 PM EDT
[#5]
Bro thread
Link Posted: 2/11/2021 2:31:54 PM EDT
[#6]
Kubota!  

I'd say you mean in vehicles though.
Link Posted: 2/11/2021 2:32:54 PM EDT
[#7]
If you are talking new light duty trucks, most likely Cummins.  They even went and changed the CP4 to a modified CP3 to increase reliability, so they obviously are on top of shit.  Of course the emissions and Fiat wrapper will take its toll on reliability...
Link Posted: 2/11/2021 2:33:42 PM EDT
[#8]
And here...we....go.
Link Posted: 2/11/2021 2:34:14 PM EDT
[#9]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Kubota!  

I'd say you mean in vehicles though.
View Quote


Kubota + Ford Fiesta!

Super Milage Car - Diesel Ford Festiva 60 MPG City

Link Posted: 2/11/2021 2:35:28 PM EDT
[#10]
Cummins
Link Posted: 2/11/2021 2:36:03 PM EDT
[#11]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
under current production?

impossible to say. none of them have been around long enough to know.

historically.

this little motor.

https://cdn.drivingline.com/media/2323598/bosch-ve-injection-pump-volkswagen-alh-diesel.jpg

I see these things with 300k plus miles, all the damn time. weekly. I have one in the shop now getting a window regulator.
View Quote


Old VW??
Link Posted: 2/11/2021 2:37:09 PM EDT
[#12]
Current production? Cummins ISB
Link Posted: 2/11/2021 2:39:43 PM EDT
[#13]
Cummins 6BT CPL 2175
Link Posted: 2/11/2021 2:43:12 PM EDT
[#14]
Link Posted: 2/11/2021 2:43:44 PM EDT
[#15]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


Old VW??
View Quote


yep.

the first two generations of TDI.

after 05 they turned to poop.

they're slow as hell, but a little maintenance and they just keep running, like little industrial generator motors.
Link Posted: 2/11/2021 2:43:46 PM EDT
[#16]
I like C15’s.
Link Posted: 2/11/2021 2:47:04 PM EDT
[#17]
The two that immediately come to mind are the Cummins 5.9L and the Powerstroke 7.3L.

After that, it's all a crapshoot because they're "emissions" engines and most of their respective problems are related to the emissions equipment, not the engines themselves.

If I was buying a brand new diesel pickup, I'd lean towards the Ford, but the Cummins in the RAM is nice, too.
Link Posted: 2/11/2021 2:55:51 PM EDT
[#18]
Cat engines.
Link Posted: 2/11/2021 2:56:34 PM EDT
[#19]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
under current production?

impossible to say. none of them have been around long enough to know.

historically.

this little motor.

https://cdn.drivingline.com/media/2323598/bosch-ve-injection-pump-volkswagen-alh-diesel.jpg

I see these things with 300k plus miles, all the damn time. weekly. I have one in the shop now getting a window regulator.
View Quote

ohhhhhh
TDI.. 2005 jetta TDI BEW engine, 45 mpg, 50 on the Hwy in 5th gear running 2300 rpms.  250,000 miles +, and all maintenace done.  just needed a stupid EGR :(  damn smog.. LOVE those
I hear the Golfs could do better in MPG.
edit: as stated below -  ALH > BEW   BEW's had direct inject, each injector big $$.  ALH, you could replace all injectors for 200 bucks.
Other poor design was the hose clamp connectors to the turbo.  Biggest POS clamp design ever.
Link Posted: 2/11/2021 3:10:22 PM EDT
[#20]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

ohhhhhh
TDI.. 2005 jetta TDI BEW engine, 45 mpg, 50 on the Hwy in 5th gear running 2300 rpms.  250,000 miles, and all maintenace done.  just needed a stupid EGR :(  damn smog.. LOVE those
I hear the Golfs could do better in MPG.
View Quote


ALH was better...

BEW wasn't too bad but those EGR coolers were terrible, and the valve covers warp and leak oil.

the BRM was fucking horrible.

worn cam, egr cooler failure, turbo failure by one of many different ways.

at least they were easy to work on.
Link Posted: 2/11/2021 3:16:05 PM EDT
[#21]
John Deere 6.6L found in the 4020s.


CAT C15 6NZ.



Either will make 5.9 Cummins look unreliable.
Link Posted: 2/11/2021 3:17:06 PM EDT
[#22]
Mercedes diesels run forever with good maintenance.

As mentioned, Ford & Cummins do well on the pick-up level.

Not sure where a Volvo diesel might be found in something but they're known for longevity.

Detroit Diesels used to be swapped in to GMC trucks & did well as they're two-strokes, turbo'd AND supercharged (in some models). I don't think they were ever OEM issue in pick-ups though.

My .o2
Link Posted: 2/11/2021 3:29:20 PM EDT
[#23]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
John Deere 6.6L found in the 4020s.


CAT C15 6NZ.



Either will make 5.9 Cummins look unreliable.
View Quote
knew a guy in SoDak that put a JD engine in a furd pickup. i never saw it, but he made it sound like a simple conversion. got a bellhousing from some place, shoehorned it into place. said it was not fast, but pretty torquey.

Link Posted: 2/11/2021 3:33:01 PM EDT
[#24]
Link Posted: 2/11/2021 3:37:23 PM EDT
[#25]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
International Harvester
View Quote


Not even close. The 6.0 Powerstroke and all subsequent Navistar "Maxxforce" engines are a crime against humanity.
Link Posted: 2/11/2021 3:38:34 PM EDT
[#26]
Yanmar
Link Posted: 2/11/2021 3:40:31 PM EDT
[#27]
1HZ is still being made AFAIK

you won't get there fast but you'll get there...  
Link Posted: 2/11/2021 3:40:36 PM EDT
[#28]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Truth.

Can't even think of what the last engine repair was on the farm's 4020. Or the transmission. Or anything else for that matter.

Well, there was the leaking fuel gasket for the filter, but I won't hold it against the old JD.
View Quote



4020s were the worst financial tractor for John Deere.


So over built and reliable they never had to sell parts.


The iron horse series. 4240, 4440, 4450, etc.  Are also up there.

The 7.6L Deere engine was bomb proof.
Link Posted: 2/11/2021 3:41:35 PM EDT
[#29]
6.2 / 6.5 Detroit Diesel found in mid 80s CUCVs and HMMWVs seem pretty robust.  I've also heard good things about the 4BT and 6BT engines.
Link Posted: 2/11/2021 4:08:50 PM EDT
[#30]
I would vote for the old non turbo vw in the rabbit. I had a 5.9 12 valve, lots of miles and repairs.
Link Posted: 2/11/2021 4:21:08 PM EDT
[#31]
B model 4 1/4 CAT.
Link Posted: 2/11/2021 4:51:56 PM EDT
[#32]
EMD 645
Link Posted: 2/11/2021 4:58:09 PM EDT
[#33]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Cat engines.
View Quote

This, no light duty pickup/car engine will ever come close to the big rig engines...only thing that might out do the big rigs would be the diesels running the generators in trains...Cat/Detroit/IH all put the light duty shit to shame...
Link Posted: 2/11/2021 5:00:48 PM EDT
[#34]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
6.2 / 6.5 Detroit Diesel found in mid 80s CUCVs and HMMWVs seem pretty robust.  I've also heard good things about the 4BT and 6BT engines.
View Quote


Those weren’t Detroit’s they were GM engines. They broke cranks and mains for the power they made. The 6.5’s ate pumps. The military version of that engine was a 6.7 a 6.2 with a stroked crank in it. The military 6.7 had a straight mechanical pump in it.
Link Posted: 2/11/2021 5:01:43 PM EDT
[#35]
Detroit Series 60?
Link Posted: 2/11/2021 5:02:09 PM EDT
[#36]
VW 1.9l ALH
5.9 cummins
Inline MB engines before the V-6 OM642
Link Posted: 2/11/2021 5:03:59 PM EDT
[#37]
The PACCAR MX13 in the '14 Peterbilt I recently moved out of was pretty good.  700k miles and it never used a drop of oil or coolant.  Only issues I ever had were the usual electric gremlins with sensors and such.  Never even had to do a parked regen.  Ever.

As for light trucks?  The pre-emission 5.9 Cummins was the high water mark of diesels.  The gutless GM 6.2 was pretty stout as well.  I would buy any of Big Three diesels today (and I did- 6.7 Powerstroke) with the understanding that I might have some issues, but I could improve my odds with obsessive preventative maintenance.

Mercedes diesels were legendary back in the day.


Link Posted: 2/11/2021 5:05:30 PM EDT
[#38]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
6.2 / 6.5 Detroit Diesel found in mid 80s CUCVs and HMMWVs seem pretty robust.  I've also heard good things about the 4BT and 6BT engines.
View Quote

6.2 and 6.5 are crap and severely underpowered.
Link Posted: 2/11/2021 5:16:03 PM EDT
[#39]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


Kubota + Ford Fiesta!

https://www.youtube.com/watch?v=SPuv_6bZKwY
View Quote


Ha cool!  I'm putting one in a Wrangler LJ right now.
Link Posted: 2/11/2021 5:23:09 PM EDT
[#40]
Some guy I surf fish with has an isuzu diesel he transplanted out of a 1980's Trooper into his old wrangler, damm thing has close to 500k miles in it & it won't die, just keeps chugging away.
Link Posted: 2/11/2021 5:34:28 PM EDT
[#41]
GM 350 Diesel.

Link Posted: 2/11/2021 5:37:05 PM EDT
[#42]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Typically the Cummins engine will last longer than the shitbox it's installed in.
View Quote



That's not saying much though.

Buddy of mine just traded off a '19 Ram 3500 diesel because it was in the shop non-stop with emissions issues.  It was in limp mode or on a rollback as much as it wasn't.

ALL new diesels are garbage.
Link Posted: 2/11/2021 5:39:39 PM EDT
[#43]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
B model 4 1/4 CAT.
View Quote



Hell yes.  

I had one in an '85 359 with 3.55s and a 15-over.  

I should have kept it around just to have a spare vehicle while my new shit was in the shop.
Link Posted: 2/11/2021 5:40:54 PM EDT
[#44]
cummins.  


get rid of the emissions shit and it will chug along forever.
Link Posted: 2/11/2021 5:41:46 PM EDT
[#45]
Detroit Diesel 671.


Link Posted: 2/11/2021 5:43:30 PM EDT
[#46]
CAT.

And old John Deeres. Modern Deere marine engines are pretty good too.
Link Posted: 2/11/2021 5:43:33 PM EDT
[#47]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Kubota!  

I'd say you mean in vehicles though.
View Quote


They've been swapped into various vehicles, ranging from two wheels to four wheels.
Link Posted: 2/11/2021 5:44:37 PM EDT
[#48]
EMD locomotive engine
EMD V20-710 Start-up and rated load. The original video!
Link Posted: 2/11/2021 5:47:14 PM EDT
[#49]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


Those weren’t Detroit’s they were GM engines. They broke cranks and mains for the power they made. The 6.5’s ate pumps. The military version of that engine was a 6.7 a 6.2 with a stroked crank in it. The military 6.7 had a straight mechanical pump in it.
View Quote



Uhh....Every single thing in this post is nonsense. Like all of it.
Link Posted: 2/11/2021 5:47:56 PM EDT
[#50]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


ALH was better...

BEW wasn't too bad but those EGR coolers were terrible, and the valve covers warp and leak oil.

the BRM was fucking horrible.

worn cam, egr cooler failure, turbo failure by one of many different ways.

at least they were easy to work on.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:

ohhhhhh
TDI.. 2005 jetta TDI BEW engine, 45 mpg, 50 on the Hwy in 5th gear running 2300 rpms.  250,000 miles, and all maintenace done.  just needed a stupid EGR :(  damn smog.. LOVE those
I hear the Golfs could do better in MPG.


ALH was better...

BEW wasn't too bad but those EGR coolers were terrible, and the valve covers warp and leak oil.

the BRM was fucking horrible.

worn cam, egr cooler failure, turbo failure by one of many different ways.

at least they were easy to work on.


What years and models should I be looking for, if I was thinking about buying a used car, pulling the ALH engine out to put in something else, then either parting the car out or selling it to a salvage yard?

My experience is limited to the 1.6 normally aspirated diesels used in the Rabbits and Jettas in the 1980s.
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