Honda Recall - 3.5L main bearing problems

[drwebb]

So Honda is having trouble with their V6 main bearings: https://www.cnn.com/2024/11/11/business/honda-engine-recall/index.html

Not a good look such a basic component has a defect coming from an OEM that leans into their engine durability prowess (or at least used to).

 

[TugboatEng]

I joke sometimes that a sign of good quality control is that every vehicle has the same problems because they are built so consistently. Quality control doesn't fix engineering oversight.

 

[SwinnyGG]

I joke sometimes that a sign of good quality control is that every vehicle has the same problems because they are built so consistently. Quality control doesn't fix engineering oversight.

I get framing this as a joke, but it's pretty damn accurate.

In my past life as a designer of equipment, we had a similar mantra - which was 'A bad process is just as easy to get under fine control as a good process'.

Sometimes the process design itself is the problem, and you don't know it's bad until you've built enough product to see the low rate issues appear.

 

[mfgenggear]

I get framing this as a joke, but it's pretty damn accurate.

In my past life as a designer of equipment, we had a similar mantra - which was 'A bad process is just as easy to get under fine control as a good process'.

Sometimes the process design itself is the problem, and you don't know it's bad until you've built enough product to see the low rate issues appear.

Well it depends on the level of experience of engineers and the support group.
Which I am surprised Honda is having issues.
Data or science is only as good as its sound
Accurate data collected.
Here's what we know , there is a recall, so there's an issue. We don't have enough information until we dig up the actual facts.

 

[SwinnyGG]

We actually don't know that there is an issue.

The original article and the later linked article about GM 6.2 engines are both reporting on NHTSA investigations, not recalls. Investigations can turn into recalls, but they aren't the same thing.

 

[mfgenggear]

We actually don't know that there is an issue.

The original article and the later linked article about GM 6.2 engines are both reporting on NHTSA investigations, not recalls. Investigations can turn into recalls, but they aren't the same thing.

Well wait and see. What the investigation determines.
But it could be minor or major otherwise why open an investigation. And why recall.

 

[drwebb]

To repeat, the cited root cause for the Honda case referenced was ". . . defective (convex/concave) grinding of the crank pins due to mis-setting of manufacturing CNC leading to main bearing failures." Which sounds pretty factual unless there is cause to doubt the veracity. What that could have to do with design defects or swarf in the oil is not readily apparent. It would appear the only process needing better control involves ensuring data integrity between the design output into the actual CNC mills making the physical parts.

 

[j.caldentey]

So Honda is having trouble with their V6 main bearings: https://www.cnn.com/2024/11/11/business/honda-engine-recall/index.html

Not a good look such a basic component has a defect coming from an OEM that leans into their engine durability prowess (or at least used to).

This brand used to be very reliable, but lately its quality has been declining.

 

[XR250]

Every manufacturers's reliability is declining. Cars are getting way more complex to meet ever increasing govt. standards and buyer'd wishes for tech and low price. I feel like Ford is the worst right now though.

 

[enginesrus]

Not just Honda, so many other brands having the same issues. And the cause? Most all the causes are in plain site and no one can see it.

 

[gruntguru]

Every manufacturers's reliability is declining.

Do you have some data to support that?

 

[SwinnyGG]

Not just Honda, so many other brands having the same issues. And the cause? Most all the causes are in plain site and no one can see it.

Name them

 

[XR250]

Do you have some data to support that?

Well. look at how many recalls Ford has. Their eco-boost line of engines are garbage. GM's AFM and 6.0L, Chrysler - I means it's Chrysler. Toyota replacing 100,000 Tundra engines, Honda 3.5. Nissan CVT's.
Manufacturer's doing dumb shit like wet belts (some located at the back of the erngine) , internal water pumps.

 

[mfgenggear]

my ford 2011 ranger 4x4 blew a Trans at 50k miles then at 180k, maintenance done by ford as required.

 

[mfgenggear]

my Buick lacrose died at 120k miles

 

[mfgenggear]

my 1980's don't remember exact date toyota Tercel 60k Mile Blew a head gasket warped the head.

 

[XR250]

Hmm, what is the common denominator in all these situations?

 

[CWB1]

Recalls arent a meaningful quality metric. Most are to check for issues causing minor annoyances, not critical failures, and no repair is needed. The large volumes are likewise deceiving, often driven by the fact that the OE or supplier cant identify whether one individual skipped an assembly step for a shift or a month, so the OE has dealers do an inspection and fix if needed. Personally I'd rather have dealers check for issues than ignoring them, as was common 20+ years ago.

Many issues get overblown or invented by hobbyists with little/no experience. Wish I had a nickel for every old man claiming Ford phasers or GM AFM destroyed engines every 50k, rather than simply being something to monitor/repair on high-mileage engines. Likewise, "new technology" like those dam Ecoboost engines and wet belts cant be trusted despite being extremely reliable over 15+ years of production. The only one funnier is that auto engineers dont actually work on vehicles.

 

[mfgenggear]

The Toyota died because of defective water pump. Cheap pump impeller failed. When to the dealer 3 times and did not detect the issue.

 

[mfgenggear]

The Ford ranger had an issue with gears and hydraulic pumps. Defective parts.

 

[TugboatEng]

I don't understand the opposition the wet belt has. Aramid reinforcement will have no issues with exposure to on hot oil. The rubber needs to be selected correctly. I'm guessing the wet belts are HNBR.