Colorado Duramax Waxed My Wrangler 3.6L

[EDankievitch]

One day I’m gonna look into finding out if these Roxor’s if they can be registered like golf carts are here in southern Jersey. If they can I want one. Great commuter ride. I miss my Samuri .

 

[TFucili]

Next time you race one of those Colorado 2.8L Duramax make sure you have an out in case they blow the stock engine up.

Little education for those looking at another GM Bean Counter Diesel 2.8L baby Duramax. GM's other bean counter disaster the 6.2L diesel that replaced the Bean Counter 5.7L Olds hand grenade had a cast crank in it that was known to break. Detroit Diesel said use a forged crank in the 6.2L diesel. GM Bean Counters said watch us not care... GM added a 100K warranty on later diesels like the the punched out 6.2 known as a 6.5 with the same cheap cast crank to be able to sell them as their busted crank reputation haunted them. Regardless this 6.5 GM Bean Counter Diesel could loose an injector, melt a piston down, lock it up at TDC, the intact wrist pin could shatter the piston skirt, bend the rod, and beat 8 holes in the cylinder wall without breaking it's wrist pin.

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Now GM has figured out how to screw up Wrist Pins in diesel engines. The 2.8L has broken plenty of wrist pins. A plague of blown engines isn't "pretty good": it's AWFUL. And par for the GM Diesel Bean Counter Course. PDF attached of an analysis of just one failure.

GM hasn't learned one dammed thing about how to design and produce a reliable diesel engine. GM needs outside help to do so and even then they still snap crankshafts in the 6.6L Duramax. At least the Isuzu designed 6.6L could usually make it through the 100K warranty without failing the rotating mass.

GM produces cheap diesel engines that border on "You would be better off sucking down the single digit MPG gas with a gas engine."

And now GM wants you to buy a 3.0 I6 diesel with an over-complicated thermally limited cooling system and a belt driven oil pump. Typical inadequate GM cooling system... What could possibly go right?

And, lest we forget, their fingerprints are all over the Eco diesel...

 

[Tuesdak]

And, lest we forget, their fingerprints are all over the Eco diesel...

Yeah, I am not surprised my prediction turned out to be true for this engine's reputation. I was surprised it has electric cooling fans: a clear signature of typical GM inadequate cooling systems from the word go.

Ugly Surprise. The 2.8L is also used in GM 3/4 ton vans, replacing the 6.6L V8 Duramax... (GM does not make a 1/2 ton full size van anymore.) How did that work out in the past? Shove a small 4 banger in a 3/4 ton just like GM did with a Light Duty 6.2 IDI diesel and expect it to work hard... It's on par with the Mercedes Diesel engine in their vans. Word is the Mercedes Diesel runs so hot it ruins it's engine oil - aka the oil change interval is 3x too long. This results in the cylinders wearing out and high oil consumption in 80,000 miles or less. At least it's not hot oily parts embedded in the pavement, but, still a low bar of reliability going the distance with a diesel engine.

 

[jgillott]

... It's on par with the Mercedes Diesel engine in their vans. Word is the Mercedes Diesel runs so hot it ruins it's engine oil - aka the oil change interval is 3x too long. This results in the cylinders wearing out and high oil consumption in 80,000 miles or less. At least it's not hot oily parts embedded in the pavement, but, still a low bar of reliability going the distance with a diesel engine.

Interesting. I'm not doubting your assessment, but I have a lot of experience with the MB diesels in the Sprinter and this is the first that I have heard this. The OM651 in mine has been flawless and the fleet of Sprinters operated by Hilltop Labs here in western PA has some examples, both OM651 and OM652 with over 750K on them. I am familiar with the initial concerns that owners had when MB upped the service interval from 15K to 20K in 2015 with the introduction of the 229.52 spec oil and the move to 5w30 from 0w30. However, I haven't heard of anything specific since concerning those two engines after the initial online concerns.

 

[Tuesdak]

@jgillott One of the better References I noted for the Sprinter diesel problems below. I forget where I read it but the engine has a pan under it that keeps heat in for faster warm up. In our climate it's the sort of thing that gets removed... Ya, took a close look at vans lately.

http://www.stephensservice.com/bluetec-diesel-issuesproblems/