No more 5.0 in the Titan

[RNeet]

There are other factors here in play:
1. They weren't selling anywhere near what Cummins needed to breakeven.
2. Cummins has inked a deal with Isuzu to explore collaboration on vehicle engines &
powertrains. Question: Will the 5.0 make it's way into Isuzu vehicles with a Isuzu
badge? Stay tuned .....
3. My nephews Titan w/5.0 decided to play hand grenade and left it's guts on the
highway with 21K on the ODO. New engine replaced under warranty.
4. Historical fact ... Every V8 Cummins has ever built has been less than stellar, V504,
V555(the Triple Nickel, which suffered from a 25%+ warranty failure rate) and the
V903. Is the 5.0 to suffer the same fate? Stay tuned ....

 

[crispyboy]

Personally I just can’t get passed “Nissan styling” in general. To me the truck is just too ugly to ever consider.

 

[jgillott]

Being the cheapskate that I am, I am trying to be as frugal as possible. I know that isn't the best route in this process.

 

[SnoKing]

There are other factors here in play:
1. They weren't selling anywhere near what Cummins needed to breakeven.
2. Cummins has inked a deal with Isuzu to explore collaboration on vehicle engines &
powertrains. Question: Will the 5.0 make it's way into Isuzu vehicles with a Isuzu
badge? Stay tuned .....
3. My nephews Titan w/5.0 decided to play hand grenade and left it's guts on the
highway with 21K on the ODO. New engine replaced under warranty.
4. Historical fact ... Every V8 Cummins has ever built has been less than stellar, V504,
V555(the Triple Nickel, which suffered from a 25%+ warranty failure rate) and the
V903. Is the 5.0 to suffer the same fate? Stay tuned ....

Yeah, they should have whoopped off two cylinders of the 6.7 to create a 4B4.7 similar to the 4B3.9, balanced it to run smoothly and stayed in their wheel house of inline engines.

I put 2800 hours on twin B150(4BT3.9) over 19 years in the boat. I did starter relays and solenoids, thermostats, belts, adjusted valves a couple times, filter and oil changes at 200 hours. Sold the boat with original turbos, injectors and injector pumps, and never a major problem with them.

Funny thing with each engine idling by it's self was fairly smooth. Having them both idling at the same time was a different story, it was like maybe they should have been closer together or further apart.

 

[RNeet]

SnoKing,

They did just that.... the QSB4.5. And it's available balanced. Cost per HP is high so I doubt they could sell it into the highly cost conscious automotive market.

As for the low speed vibration of twin 3.9 marine engines, 1) they usually were not balanced, and 2) you could have twin 5.9L's and suffer the same issue. The to way fix that is to use different durometer mounts under the each engine so that their critical frequencies are at different RPM's. Of course engine compartment and hull stringer design also play a part.

 

[RVTRKN]

Why I never bought one, was price and not a 3/4 ton. The price was (don't know anymore) the same as the Ram CTD but with more truck for the buck. I wanted one, I could just never get past the cost. I lived in an RV park for about 8 months and saw a few pull in with 25-27 foot 5vers. I talked to a few owners and never heard of any complaints.

 

[SnoKing]

SnoKing,

They did just that.... the QSB4.5. And it's available balanced. Cost per HP is high so I doubt they could sell it into the highly cost conscious automotive market.

As for the low speed vibration of twin 3.9 marine engines, 1) they usually were not balanced, and 2) you could have twin 5.9L's and suffer the same issue. The to way fix that is to use different durometer mounts under the each engine so that their critical frequencies are at different RPM's. Of course engine compartment and hull stringer design also play a part.

Not quite the same:
B3.9 4.02 IN X 4.72 IN
B4.5 4.02 IN X 5.39 IN a stroked 3.9
B5.9 4.02 IN X 4.72 IN
6.7 4.21 IN X 4.88 IN

There was a marine 4BTA250 4.02 IN X 4.72 IN, there does not appear to be a marine engine based on a 2/3rds 6.7.