Broken connecting rod
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New User
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Broken connecting rod
2016 f350 w 23k on it went in to dealer for oil pan leak, replaced both oil pans. Tech drove the truck. .5mls from dealer shop and heard a bang. Towed back to shop. Found a hole in the new pan. Removed pan to find connecting rod and piston skirt pieces. No tune ever installed and religiously maintained. What can cause this catastrophic failure
Posting Guru
Joined: Aug 2007
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From: BA, OK
The new oil pan requires 13 quarts of oil 
............all kidding aside I'm sure the tech refilled the engine with oil before the test drive. It's uncommon but on rare occasions the 6.7L has had catastrophic failures.
I'm assuming you have a 6.7l since you had both oil pans replaced.
............all kidding aside I'm sure the tech refilled the engine with oil before the test drive. It's uncommon but on rare occasions the 6.7L has had catastrophic failures.I'm assuming you have a 6.7l since you had both oil pans replaced.
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The new oil pan requires 13 quarts of oil ............all kidding aside I'm sure the tech refilled the engine with oil before the test drive. It's uncommon but on rare occasions the 6.7L has had catastrophic failures.
I'm assuming you have a 6.7l since you had both oil pans replaced.
............all kidding aside I'm sure the tech refilled the engine with oil before the test drive. It's uncommon but on rare occasions the 6.7L has had catastrophic failures.I'm assuming you have a 6.7l since you had both oil pans replaced.
Fleet Mechanic
Joined: Jan 2016
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Generally a rod won't fail catastrophically without some warning. Take a look at the other rod bearings. Do they indicate a lack of oil lubrication? If so then I would be looking at the tech not adding oil. If the other rod bearings look OK then it will be something else. Did the rod break away from crankshaft journal? Did it break in the middle of the rod? Is the rod bent? Those are the questions you need answers to and maybe you can post those answers here and get a better idea of what might have happened.
Posting Guru
Joined: Aug 2007
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From: BA, OK
If the upper oil pan is found to be out of spec for flatness it gets replaced as well.
Logistics Pro
Joined: Dec 2003
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From: Foothills of NC
I would guess no oil installed or oil filter loose and all oil pumped out. My bet is no oil though. They will do everything they can to cover themselves and charge you. Demand to see inside that engine, or have it towed to another Ford dealer for a tear down for inspection.
If this dealer is going to do the inspection, demand to be there watching, or if you don't know what to look for, hire an independent mechanic to watch.
This smells fishy on the dealers part.
If this dealer is going to do the inspection, demand to be there watching, or if you don't know what to look for, hire an independent mechanic to watch.
This smells fishy on the dealers part.
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Generally a rod won't fail catastrophically without some warning. Take a look at the other rod bearings. Do they indicate a lack of oil lubrication? If so then I would be looking at the tech not adding oil. If the other rod bearings look OK then it will be something else. Did the rod break away from crankshaft journal? Did it break in the middle of the rod? Is the rod bent? Those are the questions you need answers to and maybe you can post those answers here and get a better idea of what might have happened.
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Fleet Mechanic
Joined: Oct 2017
Posts: 1,704
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From: Southwest Ohio
I don't see how a failed connecting rod can cause shrapnel to exit out the exhaust and make its way to the turbo unless the piston was destroyed in the process.
You'll never get the true answer as to what caused the failure since the dealership isn't going to admit leaving a rag wrapped around the oil pump pickup or damaging the pickup tube during the pan replacement.
-- Dave
You'll never get the true answer as to what caused the failure since the dealership isn't going to admit leaving a rag wrapped around the oil pump pickup or damaging the pickup tube during the pan replacement.
-- Dave
Fleet Mechanic
Joined: Mar 2014
Posts: 1,268
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From: Missouri
Sounds like a good time to call a lawyer. Don't wait.
Logistics Pro
Joined: Dec 2003
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From: Foothills of NC
of course they said they put the correct amount of oil in. The rod broke just below the wrist pin. The journal was oval but intact. They ordered a new long block, I'm insisting on replacing the turbo as well. Just don't know how far the shrapnel traveled after it cam apart
Are you having to pay for all of this?
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They have told me no charges. I'm sure I will never get the truth to what caused the failure. My concern for the turbo is metal in the oil May have traveled to the turbo and cause it to fail down the road.
Post Fiend
Joined: Nov 2001
Posts: 6,748
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From: Tallassee, ALabama
The oil has to pass through the filter prior to going to the bearings or turbo.