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I expect there are a few spots w rtv or something similar, for example where the oil pan mates w the front and rear covers, there's a blob of sealant in those 4 spots to seal between the vertical and horizontal gaskets (at least those spots on an L96).

There may also be plugs that use ptfe or something like that. IDK if the original plug has it applied wet just prior to installation, or if something is pre-applied when the plug is manufactured.
 
Hello,

I have a 2022 5.3 silverado with 27k miles on it. My check engine light came on (not flashing) so I brought it into my dealer. They found metal shavings and an orange rubbery substance in my oil. I had an oil change about 70 miles ago (third party shop) and they are telling me that this won’t be covered under warranty because it is a foreign substance and they don’t know what it is. Has anyone ever heard of something like this? What avenues do I have to dispute a denial? I don’t understand how this would not be covered under warranty, the orange substance has to be from a failing engine component, but they are acting like it is not.
well, you had a 3rd party do the oil change, and who knows what they did - instead of the dealer while under warranty... so yes, GM can deny you any warranty...
 
You don’t have to use the dealer for repairs or maintenance to keep your warranty in effect. In fact, it’s illegal for a dealer to deny your warranty coverage because you had routine maintenance or repairs done by someone else. But if the warranty says that the work will be done for free, the dealer or manufacturer can make you use repair facilities it chooses. And if the warranty says you will get parts for free, the dealer or manufacturer can require you to use parts it chooses.
 
just for asking,

as there was a check engine light, did anyone pull codes on it ? :unsure:
 
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Some of the most common rubber components on a 5.3L Ecotec engine that need regular inspection or replacement are PCV hoses, intake manifold gaskets, and oil cooler lines. These parts can degrade over time due to heat and pressure, leading to leaks, vacuum issues, and performance problems.
Positive Crankcase Ventilation (PCV) system components
The PCV system regulates pressure within the engine, and its rubber hoses are a common point of failure.
  • PCV valve and hose: This connects the PCV valve (sometimes integrated into the valve cover) to the intake manifold. As a vehicle ages, the rubber can become brittle and crack, causing a vacuum leak.
  • Valve cover grommets: These small rubber seals connect the PCV system to the valve cover and can also crack or harden, leading to oil seepage.
Gaskets and seals
The 5.3L Ecotec engine relies on several rubber or rubberized gaskets to prevent oil and air leaks.
  • Intake manifold gaskets: These are located between the intake manifold and the cylinder head. A failing gasket can cause a vacuum leak, leading to a rough idle or a check engine light.
  • Valve cover gaskets: Made of high-quality rubber, these seal the valve covers to the cylinder heads. If they wear out, they will leak oil into the spark plug wells, causing misfires.
  • Oil cooler and oil cooler adapter seals: Located near the oil filter, these gaskets can dry out and fail, causing a significant external oil leak.
  • Valley pan gasket: This is a thick rubber gasket that sits under the valley pan cover and can flatten and leak over time.
Fluid-carrying hoses
Rubber hoses are used throughout the cooling and lubrication systems.
  • Transmission oil cooler lines: These rubber and metal lines run between the transmission and the radiator to keep the fluid at the correct temperature. The rubber sections can wear out or crack, leading to fluid leaks.
  • Coolant hoses: These hoses carry coolant between the radiator, water pump, and engine and can harden or become soft and spongy with age.
And what one of these listed will cause an engine failure? I don’t see any warning of such. Maybe an oil leak or rough running.
 
And what one of these listed will cause an engine failure? I don’t see any warning of such. Maybe an oil leak or rough running.
I mean, technically, any piece of debris that's big enough to be blocking an oil passage, etc., can cause failure. We also don't know what the engine looks like, only that there's failure and it's something "orange and rubbery feeling."
 
There is something that occurred to me, and this may just be a mindless rambling....like I had nothing else to think of on this beautiful morning driving the convertible into work....

Anyway, I digress....

I know about the Magnuson-Moss act, and I also know that one is permitted to perform work on their own vehicle whether in warranty or not....however, with that "allowance," I believe that there is an expectation that whatever parts/fluids/components you may elect to use, the warranty holder/administrator has the expectation that you are going to use components that are as good as or superior to what is installed by the manufacturer....

Perhaps if the third party did indeed use a really cheap shit oil filter, I can see this coming into play.

This is just a mindless rambling, and my two cents worth.
 
I was just down to a shortblock in my l83 (I know, different generation engine) If gaskets and seals are similar between the two, the only orange rubber type material anywhere on the engine is the sealant/locker they use on the engine side of the flange on the crank balancer bolt. No idea how that would end up inside of the engine though, but it peels, acts and looks very very similar to RTV.
 
I expect there are a few spots w rtv or something similar, for example where the oil pan mates w the front and rear covers, there's a blob of sealant in those 4 spots to seal between the vertical and horizontal gaskets (at least those spots on an L96).

There may also be plugs that use ptfe or something like that. IDK if the original plug has it applied wet just prior to installation, or if something is pre-applied when the plug is manufactured.
From factory, the RTV in those places should be white or gray unless they changed it from previous generations based off of an L83
 
They shouldn't be orange. They should be black and off white/light yellow/creamish.
A white/light yellow one that has been varnished is rather orangey brown color.
If what OP is saying is true and he did not add anything what else is orange or close to orange inside an engine?
 
A white/light yellow one that has been varnished is rather orangey brown color.
If what OP is saying is true and he did not add anything what else is orange or close to orange inside an engine?
Is it reasonable to expect that much varnish after 27K miles? Honest question as I haven't been inside many newer gen GMs but I wouldn't expect that much varnish at that mileage with reasonable service intervals.

Not sure on the sealant on this generation engine but the L83 has an orange/red rubbery sealant on the backside of the crank balancer bolt flange. It peels off pretty easily. No idea how that would end up in the oil but it is the only thing that I can think of that is definitely orange.
 
Is it reasonable to expect that much varnish after 27K miles? Honest question as I haven't been inside many newer gen GMs but I wouldn't expect that much varnish at that mileage with reasonable service intervals.

Not sure on the sealant on this generation engine but the L83 has an orange/red rubbery sealant on the backside of the crank balancer bolt flange. It peels off pretty easily. No idea how that would end up in the oil but it is the only thing that I can think of that is definitely orange.
I would not either but my gut is telling me there is either missing info or more to the story.
27K is low miles but humor me for a second. Most new vehicles come with free oil changes unless I am wrong but what if OP has been taking his truck into the dealer. What OP believes is a completed oil change is in fact no change is being done or say the dealer is only putting in enough that Low Oil notifications are not triggered. Maybe the dealer was only doing 6.5 quarts. Again I am having a Paul Harvey moment needing the rest of the story because (not by any malicious intent or maybe it is) that he had done something to precipitate the event knowingly or unknowingly. I do not think OP is lying or being deceptive but maybe it is just me I do tend to be skeptic till I think I have all the answers and facts before drawing conclusions.

That is a good question for OP is if he checked his oil levels frequently or if ever prior to failure? If you did were you showing oil on the stick each time, was it showing lower when you checked last one, ever overheat the truck?
 
I would not either but my gut is telling me there is either missing info or more to the story.
27K is low miles but humor me for a second. Most new vehicles come with free oil changes unless I am wrong but what if OP has been taking his truck into the dealer. What OP believes is a completed oil change is in fact no change is being done or say the dealer is only putting in enough that Low Oil notifications are not triggered. Maybe the dealer was only doing 6.5 quarts. Again I am having a Paul Harvey moment needing the rest of the story because (not by any malicious intent or maybe it is) that he had done something to precipitate the event knowingly or unknowingly. I do not think OP is lying or being deceptive but maybe it is just me I do tend to be skeptic till I think I have all the answers and facts before drawing conclusions.

That is a good question for OP is if he checked his oil levels frequently or if ever prior to failure? If you did were you showing oil on the stick each time, was it showing lower when you checked last one, ever overheat the truck?
I guess that is plausible. If dealer has been jerking him around on oil changes, lower than recommended oil levels and increased varnish... I could see the chain shaving off slivers of the tensioner slides and they would probably look rubbery being as thin as those shavings would be.

If there is that much varnish I wouldn't be surprised if white RTV didn't take on a hue that could somewhat resemble burnt orange. Maybe a sealant happy factory worker and less than stellar maintenance...

Varnish wasn't even a factor that I originally considered with that mileage.

I agree. I don't get the feeling that OP is being deceptive.

I also agree, seems like there is something missing from the story.
 
I guess that is plausible. If dealer has been jerking him around on oil changes, lower than recommended oil levels and increased varnish... I could see the chain shaving off slivers of the tensioner slides and they would probably look rubbery being as thin as those shavings would be.

If there is that much varnish I wouldn't be surprised if white RTV didn't take on a hue that could somewhat resemble burnt orange. Maybe a sealant happy factory worker and less than stellar maintenance...

Varnish wasn't even a factor that I originally considered with that mileage.

I agree. I don't get the feeling that OP is being deceptive.

I also agree, seems like there is something missing from the story.
The orange part stood out so I just started check listing what has access to crank case and could be orange and the only thing I recall that has that color is the guides while also being rubbery. This one though still seems it seems like we are missing that one bit of info. My suspicion is the dealer knows something or is just trying to get out of doing it. Usually they have to get approval from GM but I would think they need an explanation like do they suspect OP of intentional sabotage?

I think I know what we are missing we know the engine failed but internally what failed? Bearings and journals or are we talking catastrophic like throwing a rod out the side of the block or through the windage/oil pan making the truck look like it has chocolate sauce running out.
 
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