What was/is the most reliable IC engine of all time?

[OppositeLocK]

2JZ? GM LS? Ford EcoBoost?

You tell me.

EDIT: Also, it would be interesting to share if there was anything about them that made them inherently more reliable than engines today.

 

[Passport1]

Volvo B21

 

[ron17571]

Dodges slant six? they seemed to just last forever. Years ago many Japanese engines were like this. Now? not so much.

 

[Drew7a]

4.7L Toyota V8 would be my choice. But others have their favorites.

The Million-Mile 2007 Toyota Tundra Pickup: The Teardown

The high-mileage Tundra was torn down to check its health—here's what Toyota found.

www.motortrend.com

 

[Superflan]

MB OM602/605

 

[ripcord]

Detriot Series 60's. None of those gassers even come close

 

[Bjornviken]

4.7L Toyota V8 would be my choice. But others have their favorites.

The Million-Mile 2007 Toyota Tundra Pickup: The Teardown

The high-mileage Tundra was torn down to check its health—here's what Toyota found.

www.motortrend.com

thats really impressive

 

[pghvolvo]

Volvo I4 Red Blocks B21 and B23's.

I6's various manufactures Chrysler, Ford, GM, Volvo 1995 and up White Blocks, BMW and Mercedes.

Best U.S. Inline 6's GM 250ci, Ford 300ci, Chrysler 170, 190, 225 AMC Jeep 4.0 liter.

You will never appreciate the Inline 6 until you own one.

 

[wwillson]

Detriot Series 60's. None of those gassers even come close

I was listening to RoadDog yesterday and a guy called in with 2,900,000 miles on his series 60. It was tired and worn out, but making it that far is really amazing.

 

[maineiac]

Detroit 60 Series, International DT466, Isuzu 4LE and Cummins B Series

I know someone with over 80,000 hours on the 4LE in a prime power application!

 

[Kestas]

Inline 6-cyl engines are underappreciated. They are the smoothest, most naturally balanced, vibration-free engines that can be built. The only engine smoother is the V-12, which is two inline 6 engines put together.

 

[wwillson]

We have lots of experience with the Cummins 5.9 and 6.7 ISBs. The pre common rail ISBs run forever. The common rail engines with much higher specific power don't last as long, but also run for a long time.

I also posted this here in another thread.

"John Deere 6.6L inline 6 cylinder naturally aspirated diesel. Very heavy duty and ran forever. They are the most bullet proof engine I've ever operated."

 

[The Critic]

Toyota 5sfe, 5vzfe, 1/3mzfe.

 

[Nick1994]

Agreed above, the Toyota 5SFE 2.2L in the Camry is really good.

 

[2EHA]

Detriot Series 60's. None of those gassers even come close

no doubt

the 3406 is pretty close but they’re rarer nowadays

 

[Oillover]

Anything with a turbo


....my mistake, I thought you were asking for the least reliable engines of all time

 

[Zee09]

Inline 6-cyl engines are underappreciated. They are the smoothest, most naturally balanced, vibration-free engines that can be built. The only engine smoother is the V-12, which is two inline 6 engines put together.

Except the 80's 4.2 L AMC inline six.
Had one on my new "81" Eagle SX4
A rough and brash agricultural turd..

Any speed over 55 mph brought on droning and vibration. Not a interstate cruiser at all.

 

[Drew7a]

I suppose if we are talking diesels then might as well throw this one in:

Job Search Engine | Engineer Jobs

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[OppositeLocK]

Anything with a turbo


....my mistake, I thought you were asking for the least reliable engines of all time

Aren't almost all tractors turbo diesels? Don't some of them go for a million miles? I don't know if turbos are least reliable just for being turbos.

 

[tyman]

SBC350