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Well maintained 2016 at dealership thru rod bolt

Old Aug 13, 2025 | 09:50 AM
  #11  
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Originally Posted by Callisto
lol last posting was Jun 2, 2022, 04:23 AM ^^^^
I guess this thread woke him up?



I did'nt miss it either. And it is why I responded with I would like to see the actual part?
Maybe you missed those response or didn't see them?
Should I be flattered that you're keeping tabs on me or creeped out? I'm going with the later.
 
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Old Aug 13, 2025 | 10:03 AM
  #12  
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Going back and re-reading this thread I see that perhaps we all assumed a few things without getting more info?

Originally Posted by TBone
We have a 2016 CX5 that was purchased new and has been maintained at the dealership its entire life. Last weekend while driving the car stopped on the HWY and had to be towed home. I had the codes read and it was the crankshaft sensor. After having it looked at.....because (point #1)dealership was closed......was told that there was a (point#2)hole in the case due to one of the lower piston rod caps broke off and destroyed the sensor and(point #3)exited the lower motor case. Now we have to buy another engine on a car with only 100014 miles. This type of failure is unacceptable. Anyone else experience this premature engine failure and what are some remedies?
Point #1 Who was this mystery person or shop that determined the cause?
Point #2 The description was a complete connecting rod ? I think we assumed a connecting rod bolt which where are the 2 bolts??
Point 3 is the same as point 2?? but to add it did not come out the pan but described as busting through the actual cast Iron block? Lets think about the force needed for that to happen?

So the assumption being is a connecting rod bolt snapped and if so the engine was spinning a high enough RPM that it harpooned the connecting rod caps( the op did say caps not cap) though the cast iron block? I repeat lets think about the force needed for that to happen?

This I would like to see and is why I asked to see the connecting rod bolts. There are tale tell sign of fatigue breaking vs an engine that was run at a high RPM and the bolt snapped off. Plus we are looking at an engine with over 100k miles. So if it was a defective connecting rod, connecting rod bolt then these both would have broke long before those miles.

As for a vehicle that was maintained for it service life has nothing to do with a cataclysmic engine failure and that engine over 100k miles of service life with no detected Warings of a possible concern. Like a knocking sound in the engine from a connecting rod blot that was stretching/stretched or loosening up as one member described it?
The other thing is myself and other are assuming the cataclysmic engine failed was the connecting rod and not another part that caused the domino part failure effect> Without looking at the connecting rod cap and the connecting rod bolts or disassembling and inspecting the other engine parts its all speculation as to the cause.
There is also nothing mention about the ECU being scanned looking for DTC, permanent DTC and looking at the counters??? Why no mention about that? This goes back to who looked at the engine first?
Once again, we have a new member posting one post and several of us have unanswered question, yet the new member has not returned to answer any of them?


But has definitely caused a great debate
 
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Old Aug 14, 2025 | 06:29 AM
  #13  
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Originally Posted by Callisto
No just have a good memory for problematic members on forums so I look at your profile and then it came to me all the bs so Basically you trolled this thread and have not changed. LOL
Useless!
Oh, did you want me to change? I wasn't aware, perhaps I'll work on that, perhaps not. Glad to see that you're the same too.



Oh, there it is. I thought that I had quoted the post where two rules were broken by a senior member, and nothing was done about it. Things that make you go hmmmmmmm. The original post was deleted but there it is.
 

Last edited by Conrad 16.5; Aug 20, 2025 at 09:05 AM.
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Old Aug 20, 2025 | 09:03 AM
  #14  
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Originally Posted by TBone
We have a 2016 CX5 that was purchased new and has been maintained at the dealership its entire life. Last weekend while driving the car stopped on the HWY and had to be towed home. I had the codes read and it was the crankshaft sensor. After having it looked at.....because dealership was closed......was told that there was a hole in the case due to one of the lower piston rod caps broke off and destroyed the sensor and exited the lower motor case. Now we have to buy another engine on a car with only 100014 miles. This type of failure is unacceptable. Anyone else experience this premature engine failure and what are some remedies?

What became of this, TBone?
 
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Old Aug 20, 2025 | 02:48 PM
  #15  
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Originally Posted by Conrad 16.5
What became of this, TBone?
With only a single post made, I doubt he will be back.
 
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Old Aug 20, 2025 | 03:08 PM
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Originally Posted by Conrad 16.5
What became of this, TBone?
Originally Posted by chickdr19
With only a single post made, I doubt he will be back.
Yup and the fact that I was more specific about the person (s) that looked at the engine and made the wild guess without dropping the pan or looking at the engine lower end respirating assembly parts.

I love the stories my customer would give when they "smoked" an engine. When I disassembled and looked at the damage, the engine told a different story. Sometimes I would tell the customers but most of the time I just smiled and rebuilt their engine.$$$$ 4 me! This was BTW when I had a several years successful fully equipped Performance engine machine shop complete with engine Dyno and Chassis Duno as well a very surgically clean engine assembly clean room. Just wanted to mention that so a couple of members reading will think before posting!!!
 
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Old Aug 22, 2025 | 04:49 PM
  #17  
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Originally Posted by retread888
Im sad to hear this --as 100K is when I suspect we all start to feel like its going to be a high mileage victory .....paying you back for your investment in service and purchase price- since 2016 was the last year for the 2.0 engine --which I believe only came in a manual transmission --- Im interested in which engine you have ---2.0 /2.5 ?
You know aside from some personality deference of how we like to post, I still feel you are above average as a DIY and car enthusiast. Given some of your responses you should also be more on the side that there is more to the story what really happened then what was told to the OP or something else.
It was NOT because of the engine from Mazda being in anyway defective I know that much without seeing the engine. If it is Guinness records may want to get in touch with him? lol
BTW the biggest difference between the 2.0 and 2.5 is the piston sleeves and piston size. And especially regarding a cataclysmic engine destroyed by a rod bolt at those miles that claimed was not over revved.
 
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Old Aug 23, 2025 | 12:09 AM
  #18  
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[QUOTE=Lobstah;237100]
Originally Posted by Callisto
Back on topic : I would really love to see a few detailed pictures of that connecting rod bolt that failed!
Don't anyone take this wrong but something smells fishy????

There are actually instances of connecting rod bolt failures which an easy Google search with pictures will confirm.
Though you are correct that without seeing the evidence in this particular case we cannot confirm that.

I can confirm that I have seen bolt failures several times in farm/automotive/warehouse conveyor and Biotech manufacturing equipment.
Some caused by faulty installation, stripped threads, wrong torque spec. wrong bolt and others by faulty material and/or manufacturing in the bolt itself.
As a long time first responder in all my employment fields I've even had the unfortunate experience to personally have seen pacemakers and heart valves/stents fail.
Which is why I say there is no guarantee on anything except death which only gets closer every day we wake up
Well - indeed i always take extreme posts by members who joined the same day they list a major complaint with a grain of salt .....however Its not implausable that someone has no where else to turn - but the devil is usually in the details .....or should i say ...lack thereof -
 
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Old Aug 23, 2025 | 09:10 AM
  #19  
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Because without at least showing one-time what abbreviations are most have no clue the meaning.

Ro or R/O mean in the automotive world Repair Order. The term used by auto manufactures would actually be a SO or S/O meaning is Service Order. Also, a term use by all of the prementioned is WO or W/O that means work order.
The roving warranty inspector by auto manufacture specifically Mazda should they look at but not inspect the complete engine by way of disassembly would deny a warranty claim based on the miles and no passed history of a Skyactiv engine with cataclysmic failure.

I know this to be a fact given that I am an Authorized Warranty Automotive Service Technician for several auto manufactures including Mazda! And that I have go to dealerships with similar engine events and simply stated the hours to dismantle the engine inspect all the parts and some parts would need metal analysis to determine if it were a defect. Mazda based on how they handle warranty claims of this sort would not pay the labor dollar to someone like me or a dealership to do that.

But as some of us pointed out the OP has not returned and not really given all the important information only that an independent shop (that was not really confirmed only suggested) or just a person and nothing from Mada dealership directly? That would mean that the Mazda would have to be towed there at the owner's expense.

One other note to be considered the OP mention that the ECU was scanned yet only partial information about a sensor. This is missing so much other information that either the OP failed to post, the person doing the scanning only looed at basic areas or didnt know all the area's to look in an ECU manily perment DTC and the counters relating to unresolved DTC and other issues.
 

Last edited by Callisto; Aug 23, 2025 at 09:14 AM.
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Old Aug 24, 2025 | 12:17 AM
  #20  
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Originally Posted by chickdr19
With only a single post made, I doubt he will be back.
HIt and run --Joined the same day the first post was made--
 
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