[forgivenjhn316]

Also if an engine is replaced what all does that include? Is my computer compatible with the new engine or would I have to have it reprogrammed? If I happened to be running a tune would it be compatible with new engine? Would I have to get a new computer all together?

 

[Two Yeets]

To the best of knowledge, after years of lightly studying these trucks and reading the service manual, the only thing computer specific parts are those which shouldn't be damaged from a broken crankshaft. Fuel injectors, and fuel rail pressure regulator are two items I know for certain have certain numbers in the ECM.

Each fuel injector has a trim code programed to the respective cylinder. The ECM decodes this number to understand the flow characteristics, which allows it to adjust fuel delivery for each cylinder. The engine should run if these codes do not match the injector (number 3 injector reinstalled into cylinder 5, for example) are out of order, but it may not be as smooth.

The fuel rail pressure regulator has to be moved to the new engine, or the ECM has to be reprogrammed to a new one. The manual states the truck won't start if that isn't addressed.

I'm sure there's a few other sensors that have to be moved to avoid more programming, but there's really not much of a reason to get rid of them anyways. Hold off any purchases until the damage is assessed. Maybe you got lucky as hell, and the block is unmolested, meaning a crankshaft and a simple rebuild is all you need. Or maybe it's been reduced to a bpat anchor. Only one way to find out.

Here's a thread I made with a shit load of information and some manuals you may find helpful. Keep us updated.

 

[forgivenjhn316]

To the best of knowledge, after years of lightly studying these trucks and reading the service manual, the only thing computer specific parts are those which shouldn't be damaged from a broken crankshaft. Fuel injectors, and fuel rail pressure regulator are two items I know for certain have certain numbers in the ECM.

Each fuel injector has a trim code programed to the respective cylinder. The ECM decodes this number to understand the flow characteristics, which allows it to adjust fuel delivery for each cylinder. The engine should run if these codes do not match the injector (number 3 injector reinstalled into cylinder 5, for example) are out of order, but it may not be as smooth.

The fuel rail pressure regulator has to be moved to the new engine, or the ECM has to be reprogrammed to a new one. The manual states the truck won't start if that isn't addressed.

I'm sure there's a few other sensors that have to be moved to avoid more programming, but there's really not much of a reason to get rid of them anyways. Hold off any purchases until the damage is assessed. Maybe you got lucky as hell, and the block is unmolested, meaning a crankshaft and a simple rebuild is all you need. Or maybe it's been reduced to a bpat anchor. Only one way to find out.

Here's a thread I made with a shit load of information and some manuals you may find helpful. Keep us updated.

Thanks very much. Definitely useful info. I appreciate it

 

[Vann5]

I like the idea of a reman motor if that would be an option. One that has already been rebuilt with the crank replaced.

Be aware that there is no one re-manufacturing this engine that I'm aware of....the volume was WAY too low to make it worthwhile. And to the point of risk, frankly, you will never eliminate it with any of the cranks. They have broken on 2018's as well. Not sure about 2019's but time will tell. They are probably the best bet to look for on a salvage yard. There is a thread on here about crankshaft part numbers. Cummins and Nissan had at least one supersession on the part number and changed manufacturers on the crank. The "new" crank part number has also broken. So no ironclad guarantees with any of these engines/cranks in reality (sadly).

 

[forgivenjhn316]

Be aware that there is no one re-manufacturing this engine that I'm aware of....the volume was WAY too low to make it worthwhile. And to the point of risk, frankly, you will never eliminate it with any of the cranks. They have broken on 2018's as well. Not sure about 2019's but time will tell. They are probably the best bet to look for on a salvage yard. There is a thread on here about crankshaft part numbers. Cummins and Nissan had at least one supersession on the part number and changed manufacturers on the crank. The "new" crank part number has also broken. So no ironclad guarantees with any of these engines/cranks in reality (sadly).

So to do a rebuild of my engine and to install a new crankshaft regardless of part number still produces no guarantees?

 

[Vann5]

Well, the part number change happened in 2017 and there have been MY 2018 cranks that have broken with the new number based on self-reports on the thread I mentioned. So, opinions may vary, but I interpret that as a continuing risk. Clearly, your best bet is to find a 2019 motor on a salvage yard, but even then, the word "guarantee" is a risky word with these motors it seems.

 

[forgivenjhn316]

Well, the part number change happened in 2017 and there have been MY 2018 cranks that have broken with the new number based on self-reports on the thread I mentioned. So, opinions may vary, but I interpret that as a continuing risk. Clearly, your best bet is to find a 2019 motor on a salvage yard, but even then, the word "guarantee" is a risky word with these motors it seems.

Thanks

 

[forgivenjhn316]

Ok so I had the truck brought to a local diesel shop near me for a diagnosis. They called yesterday evening to let me know the truck needs a motor. Said it was internal failure of some sort but couldn’t be specific. They do not want to dig into it any deeper and they will not do an engine swap for me for lack of Nissan programming at their shop. I’ve been under the assumption that there will be no programming needed. Simply plug and play. Then out the door. I’m located in WV. Anyone on here have any recommendations? If you have swapped engines already did you run into any problems? This is gonna cost me a lot of money. Thanks

 

[NavyCuda]

Ok so I had the truck brought to a local diesel shop near me for a diagnosis. They called yesterday evening to let me know the truck needs a motor. Said it was internal failure of some sort but couldn’t be specific. They do not want to dig into it any deeper and they will not do an engine swap for me for lack of Nissan programming at their shop. I’ve been under the assumption that there will be no programming needed. Simply plug and play. Then out the door. I’m located in WV. Anyone on here have any recommendations? If you have swapped engines already did you run into any problems? This is gonna cost me a lot of money. Thanks

It’s not plug and play

 

[forgivenjhn316]

It’s not plug and play

Ok so what all would need to be done for my truck to accept an engine?

 

[NavyCuda]

Ok so what all would need to be done for my truck to accept an engine?

Going to depend on the year of the engine, but at the very least, injector trim codes have to be programmed in. Actuator will probably have to be calibrated too.

 

[Vann5]

forgivenjhn316: NavyCuda is right, the ECM will have to be programmed with the injector codes and the turbo RCN actuator will have to be calibrated. Nissan has a proprietary software system called CONSULT that their dealers use. Some high end scan tools may be able to program the codes and calibrate the actuator.

A quality independent diesel shop may be able to do it if they have the right equipment, but not all do as you are finding with the current shop. Calling around to find one is probably the only solution, and yes, unfortunately it is going to be an expensive replacement.

 

[forgivenjhn316]

Ok thanks very much. I appreciate the good info.

 

[alsaleen]

Not sure if it's me or what, but has anyone ever noticed the dip in resale/trade in value starting when this investigation started? this last oct/nov i was offered 28 now is 18, i have maybe 8-9k more miles.

 

[forgivenjhn316]

Not sure if it's me or what, but has anyone ever noticed the dip in resale/trade in value starting when this investigation started? this last oct/nov i was offered 28 now is 18, i have maybe 8-9k more miles.

Yes ABSOLUTELY!!! My truck busted just last week. Tried trading it in and just eat negative equity. That’s when I realized how much they were offering me. I KBB my truck to find another financial hit to the gut. Thanks Nissan for kicking us while we’re down.

 

[alsaleen]

Yes ABSOLUTELY!!! My truck busted just last week. Tried trading it in and just eat negative equity. That’s when I realized how much they were offering me. I KBB my truck to find another financial hit to the gut. Thanks Nissan for kicking us while we’re down.

it's honestly nuts, i like the truck but the potential crank issue has me worried. not to mention the 22k for a short block to start that repair... so I was looking into a gas truck that you can get a reman engine for 6k, found one and was like holy crap that trade in went way down.

I really hope this NTSB thing pans out. even its it's them being forced to lower the cost of the darn engine.

 

[forgivenjhn316]

it's honestly nuts, i like the truck but the potential crank issue has me worried. not to mention the 22k for a short block to start that repair... so I was looking into a gas truck that you can get a reman engine for 6k, found one and was like holy crap that trade in went way down.

I really hope this NTSB thing pans out. even its it's them being forced to lower the cost of the darn engine.

it's honestly nuts, i like the truck but the potential crank issue has me worried. not to mention the 22k for a short block to start that repair... so I was looking into a gas truck that you can get a reman engine for 6k, found one and was like holy crap that trade in went way down.

I really hope this NTSB thing pans out. even its it's them being forced to lower the cost of the darn engine.

Yes I hope it all pans out as well. I’m forced to set on and keep paying for a truck that I cannot drive. Nor is it worth what I owe. Can’t find anyone within my area that is willing to work on it. 158,000 miles catastrophic internal failure. I went today and had to purchase a different vehicle because I have to get back and forth to work. My Nissan is currently nothing more than a very expensive yard ornament.

 

[NavyCuda]

The sad thing: It’s only going to get worse.

Nissan and Cummins both lost so much money on this engine they’re going to do everything in their power to never put out another dollar on it.

 

[forgivenjhn316]

The sad thing: It’s only going to get worse.

Nissan and Cummins both lost so much money on this engine they’re going to do everything in their power to never put out another dollar on it.

I’m hopeful and optimistic they can settle an agreement that would benefit all parties involved. But I’ve been wrong more than once.

 

[NavyCuda]

I’m hopeful and optimistic they can settle an agreement that would benefit all parties involved. But I’ve been wrong more than once.

I think the reality of the failures is a little more nuanced. There is enough variation in the reasons why the oil pressure/delivery might fall off that they’ll likely just lawyer their way out of it.

They only made ~39,000 of these engines total, with about 300 commercial units sold. Cummins wrote down something like 31m in losses on the ISV line. No one knows what Nissan lost, but they certainly didn’t make money.

I’m not trying to make excuses for them, but they’re going to fight this tooth and nail. To be able to pay for some kind of settlement or parts guarantee would be vastly more expensive than pit viper lawyers.