The 7.2 Cummins hype on Youtube

[Snobdds]

Going to a larger displacement makes sense for the ability to make the same amount of power while only using 60-80% of fuel load.

The old 6.7 engines need a full fuel load to make the power.

This is all for emissions.

 

[CliffordK]

I'm beginning to dislike AI generated media if for only the many inaccuracies. Examples in this case being pronouncing 7.2L as "seven two el", and showing 4-cylinder engines being manufactured while discussing a 6-cylinder.

It is automated narration. I don't know if it is AI generated or not. Probably much of the video is also AI generated, and unfortunately there is very little done to mach the video images to the report. Nonetheless, it is also not really a technical information article. So it isn't delving into valves, lifters, rockers, cams, timing, etc. Just a basic overview. The presenter likes large displacement and torque.

 

[CliffordK]

For my use, I've been driving a 3.6L gasoline Pentastar RAM for a while with an 8 speed auto transmission PLUS 4WD Low. I find it very respectable for a lot of things. A bit spongy on the suspension (not an engine problem), and it struggles to hold back a load when downshifting on a hill descent.

I'm happy enough with freeway onramps, or climbing over the continental divide. For my use I can back off a little bit when going uphill.

I think the 2.8L to 3.0L diesel engines are slightly smaller than I would prefer, but I don't own one at this time. However, I really don't need the same engine that HOT SHOT truckers are pulling 20K + loads with.

Cummins made a 5.0L V8 engine that was used in Nissan Titan pickups. That seems like it should be a good mid-sized engine. Unfortunately, it has really been a dead-end engine since the late 20-teens. So, fuel efficiency isn't halfway between a 3.0L and a 6.7L. Rather, it is about the same as the 6.7L.

 

[Renze]

A 5.9 does not have sleeves.

Off course it does, it has dry sleeves pressed into the block. It just doesnt have wet sleeves that, if you remove them, you look inside the coolant canals.

Only the Ford Basildon built tractor engines were a heavy duty motor with a parent bore design, in which the pistons run straight in the block casting. And lots of light duty automotive engines just use a hard coating on the aluminium block bores where the piston runs.

My Volvo V70 diesel has cast-in-place steel liners in an aluminium block, because aluminium cant take Diesel compression. (The gas inline 5s are parent bore) Using a diesel block in a gas racing engine enables 1000hp from these engines, which makes them a popular alternative for an LS crate motor in Icelandic rockclimb competition.

Pardon Our Interruption...

 

[Renze]

Cummins made a 5.0L V8 engine that was used in Nissan Titan pickups. That seems like it should be a good mid-sized engine. Unfortunately, it has really been a dead-end engine since the late 20-teens. So, fuel efficiency isn't halfway between a 3.0L and a 6.7L. Rather, it is about the same as the 6.7L.

It wasnt as reliable as the B6.7 and made less power, whilst not really being cheaper. So after three years it was withdrawn from the market.. introduced in 2016, withdrawn in 2019. Cummins still offers it in medium duty truck ratings, yet not in pickup truck rating anymore

https://www.cummins.com/engines/isv50?v=571&application=Medium-duty%20Truck

I dont know why Cummins ever developed it, as their historic on-road V8s were never popular.. They are famous for straight 6 and therefor a 5.7l F series six pot makes more sense, since it can be produced on the B series production line without additional tooling investment... Unlike the ISV5.0 which was an orphan after 3 years...

If they put a 460hp B7.2 in pickup trucks, a 360hp F5.7 would be plenty of power for most people who dont partake in the pissing contest, you would think...

 

[pmsmechanic]

Off course it does, it has dry sleeves pressed into the block. It just doesnt have wet sleeves that, if you remove them, you look inside the coolant canals.

Only the Ford Basildon built tractor engines were a heavy duty motor with a parent bore design, in which the pistons run straight in the block casting. And lots of light duty automotive engines just use a hard coating on the aluminium block bores where the piston runs.

My Volvo V70 diesel has cast-in-place steel liners in an aluminium block, because aluminium cant take Diesel compression. (The gas inline 5s are parent bore) Using a diesel block in a gas racing engine enables 1000hp from these engines, which makes them a popular alternative for an LS crate motor in Icelandic rockclimb competition.

Pardon Our Interruption...

Well you can go and buy those sleeves if you want but every 5.9 that I've seen in pieces does not have sleeves. If you overhaul one you buy bigger pistons just like you would for a gas motor.

Asking this question "Does a B series Cummins have piston sleeves?" gives multiple pages saying that a B series Cummins does not have sleeves or liners. You can apparently buy them, but they do not come from the factory with sleeves.

 

[Renze]

Well you can go and buy those sleeves if you want but every 5.9 that I've seen in pieces does not have sleeves. If you overhaul one you buy bigger pistons just like you would for a gas motor.

Youre right, Cummins sells repair sleeves, not replacement sleeves as in the Daf 620 engine that was used before 1996...

So either i confuse the two, or we replaced n sleeve on an already sleeved engine.. The Daf 620 did 30.000hrs in a wheel loader, on the first set of sleeves, which is why Daf discontinued them and replaced them with a cheaper 6BT (which was still good for 20.000hrs when not pushed above 155hp)