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6.4L Hemi engine issue, need opinions please!


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HAL3Y_SRT
Novice

Dec 22, 2017, 6:56 PM

Post #1 of 12 (317 views)
6.4L Hemi engine issue, need opinions please! Sign In

2014 Jeep GC SRT, 65k miles. So, the other day driving down the road, and my engine starts knocking. WTF. Pull over, dipstick read correctly but I drained the oil to make sure the right amount came out, which it did. Refilled the engine with new oil, still knocking. CEL came on, I pulled the code and it was a "Cylinder 8 Misfire". So I figured spark plug, but that doesn't tell me what caused the knocking. Pull the spark plugs from cylinder 8 that night since it was too late to drop off at the dealership, and noticed one of the 2 park plugs for cylinder 8 was broke (the porcelain or whatever material it is), and the other plug, the piston hit it and closed the gap completely on plug. Replaced the plugs, still a knock. Took it to the dealer, they took off the head and noticed bolt indents all over the chamber, which had a fine thread. The actual piston had a piece of metal melted into it.

So my question, how the f*** does that happen? I have an AFE GT Momentum CAI, but I know there is no way it got sucked into the engine from that. No one has had access to my Jeep, and it hasnt had any motor work done to it. The service manager said he didnt see any missing bolts from inside the engine and is saying its a foreign object that either dropped down the spark plug hole (impossible) or someone put the bolt in my intake (99.999999% impossible). Is there anyway a bolt could break off from inside the engine and cause that? Im lost on this one and completely stumped. Anyone have any opinions?? An inspector is coming Tuesday to come look at it to decide if it will be covered under warranty or not but the technician highly doubts it will be covered.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 22, 2017, 7:37 PM

Post #2 of 12 (307 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Have you had any repairs done to it in say the previous 6 months?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



HAL3Y_SRT
Novice

Dec 22, 2017, 8:03 PM

Post #3 of 12 (303 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In


In Reply To
Have you had any repairs done to it in say the previous 6 months?


Body work, yes. Engine work, no.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 22, 2017, 8:16 PM

Post #4 of 12 (301 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Was there anybody at that shop that you didn't get along with?

I think you already know what the possibilities here are. Either something from the engine came loose on it's own or somebody intentionally put something in there. I had it happen to me once on an old oval track race car. A screw vibrated loose from inside the carb and got sucked in.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



HAL3Y_SRT
Novice

Dec 22, 2017, 8:19 PM

Post #5 of 12 (297 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In


In Reply To
Was there anybody at that shop that you didn't get along with?

I think you already know what the possibilities here are. Either something from the engine came loose on it's own or somebody intentionally put something in there. I had it happen to me once on an old oval track race car. A screw vibrated loose from inside the carb and got sucked in.


No, no one would do that. I dont have any enemies like that. But im just so stumped on where the hell this bolt couldve came from and how it got on top of my piston. Someone said maybe the ring landing, but would it be possible for a bolt to get up there from the ring landing?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 22, 2017, 11:55 PM

Post #6 of 12 (281 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Prior post quote ">I have an AFE GT Momentum CAI, but I know there is no way it got sucked into the engine from that.<"
OK - there's an opportunity. Who did that and why?
It barely matters now how it got there and you've said no way, no chance. Stuff happens even without being on purpose. IDK - a shop rag and anything at all done even a while ago might have dropped a bolt that didn't do anything for some time finally moved along. The question is what do you want to do about it now the damage is done no matter how it happened,


T



HAL3Y_SRT
Novice

Dec 23, 2017, 6:20 PM

Post #7 of 12 (267 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Well only reason im trying to get opinions is because theyre sending an inspector to come out and see if Chrysler will cover it, so im trying to figure out where a bolt could come from that way I can tell them to look and see if there is a bolt missing from wherever. Just trying to get options before they go and deny to fix it and replace the engine on my dime without checking everything first.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 23, 2017, 9:45 PM

Post #8 of 12 (258 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Air intake has been altered and now you wonder why anything could be wrong? If OE was defective it would have been a recall now there's no telling what this (no offense meant at all) garbage aftermarket stuff did or can't do on its own or during removal and installation of it. There's the opportunity Chrysler/Fiat has nothing to do with that and sure to tell you so.
It's a "serious bummer" IMO it killed an engine if you want to blame this or have it paid for ask whoever installed that, the aFe company itself. The car maker had nothing to do with this as I see it,


T



HAL3Y_SRT
Novice

Dec 26, 2017, 6:46 PM

Post #9 of 12 (242 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In


In Reply To
Air intake has been altered and now you wonder why anything could be wrong? If OE was defective it would have been a recall now there's no telling what this (no offense meant at all) garbage aftermarket stuff did or can't do on its own or during removal and installation of it. There's the opportunity Chrysler/Fiat has nothing to do with that and sure to tell you so.
It's a "serious bummer" IMO it killed an engine if you want to blame this or have it paid for ask whoever installed that, the aFe company itself. The car maker had nothing to do with this as I see it,


T


The intake is not made from a garbage aftermarket company. And the intake was put on by me, so I would 100% know if a bolt dropped in there.

I actually went down to the dealership today and found the problem. 1 of the 2 bolts holding the throttle body plate came loose, and went into the cylinder, but Chrysler is denying the claim because the throttle body isn't covered under the powertrain warranty. Complete bs if you ask me.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 26, 2017, 7:03 PM

Post #10 of 12 (237 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

I'd agree with you on that. Total BS.

I would take it a little higher if I were you. I bet if you complain to the district manager loud enough, they will at least split the cost with you.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



HAL3Y_SRT
Novice

Dec 26, 2017, 7:12 PM

Post #11 of 12 (233 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In


In Reply To
I'd agree with you on that. Total BS.

I would take it a little higher if I were you. I bet if you complain to the district manager loud enough, they will at least split the cost with you.


Im waiting to hear back from Chrysler tomorrow. Im not going to be happy until they agree to pay for the whole repair. What happened is 100% Chryslers fault so they should pay 100% of the bill. To pay $75k for a vehicle and have to replace the engine 4 years and 65k miles later is absolutely ridiculous.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 26, 2017, 8:26 PM

Post #12 of 12 (223 views)
Re: 6.4L Hemi engine issue, need opinions please! Sign In

Quote from back a couple posts> "I actually went down to the dealership today and found the problem. 1 of the 2 bolts holding the throttle body plate came loose, and went into the cylinder, but Chrysler is denying the claim because the throttle body isn't covered under the powertrain warranty. Complete bs if you ask me.<"
This part complete BS as said. Classic defense on their part - "It's not our fault/isn't covered under powertrain" !! Then what is that for?
IDK - Sorry this happened and actually not surprised they don't want this and the other 500 engines it already happened to, to become that costly on them.
Hope you are well documented and would be aiming for 100% replacement paid for not some deal if your pain tolerance can handle it. I think you may end up with a legal issue.


The side note as I see it: Mega years at this crap know the fundamental "power" of using any volatile, liquid fuel is be fully 'evaporated' = "atomized" or it's just a campfire not controlled combustion doesn't matter what it is.
Anything COLD such as "Cold Air Intake" is totally contrary to evaporating a liquid then once evaporated must be compressed or it's just fire not powerful or useful.
Objective is evaporate a liquid to a vapor THEN compress it so you are NOT burning a liquid. Controlling when and how that happens is the whole game which is why I say these ideas of changing what should be totally all thought out long before an engine is high end science. Whole countries can't make an engine so I discount the aftermarket to hold some secret or trick. That's all on that.


Wish you luck to be treated fairly and be done with this to your satisfaction,


T







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