Hollow knock at idle

[Sage73]

Hey friends. I have a 2019 rubi 2dr 3.6 auto that has a hollow engine knock at idle when the oil temp rises over 200. I noticed when I first got it at 1k miles . It went away for awhile and now it’s back even louder at 21k. Wondering if anyone else has this?

I changed the oil the amsoil and it helped some but it’s still there.
Here is a link to a guy with a ram 3.6 that sounds just like mine. Listen for the deep hollow knock

tia

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[Sage73]

I made my own video if anyone wants to check it out.. The oil has to get over 200f before it starts doing it. Im leary of the stealerships but i might have to take it.

 

[Heimkehr]

I have a 2019 rubi 2dr 3.6 auto that has a hollow engine knock at idle when the oil temp rises over 200. I noticed when I first got it at 1k miles . It went away for awhile and now it’s back even louder at 21k.

Wondering if anyone else has this?

I changed the oil the amsoil and it helped some but it’s still there.

Here is a link to a guy with a ram 3.6 that sounds just like mine. Listen for the deep hollow knock

Oh, Lord. The sound beginning at 0:51 took me on an unpleasant trip down Memory Lane.

The Executive Summary: Within weeks of my taking delivery of a new 1995 YJ, the 2.5L 4 cyl. began to make the same sound at cold startup. The diagnosis was piston slap, and the remedy was replacement of the short block under warranty.

The same diesel-like knocking sound returned some months later. Now soured on the idea of keeping the vehicle, I sold it to a different Jeep dealer.

My experience is now 25 years old, but it's otherwise quite similar to your current observations, Chris. Best of luck with the resolution process.

 

[Sage73]

Oh, Lord. The sound beginning at 0:51 took me on an unpleasant trip down Memory Lane.

The Executive Summary: Within weeks of my taking delivery of a new 1995 YJ, the 2.5L 4 cyl. began to make the same sound at cold startup. The diagnosis was piston slap, and the remedy was replacement of the short block under warranty.

The same diesel-like knocking sound returned some months later. Now soured on the idea of keeping the vehicle, I sold it to a different Jeep dealer.

My experience is now 25 years old, but it's otherwise quite similar to your current observations, Chris. Best of luck with the resolution process.

Thanks for the reply, never thought of piston slap since it doesn't do it when cold, but you're right it does sorta sound like it.

 

[DaltonGang]

Well, I was going to make a guess at a faulty EGR valve. But, what do I really know, I'm not a professional mechanic.
i hope it isnt piston slap.

 

[DaltonGang]

When are you taking it in? ?

 

[Sage73]

When are you taking it in? ?

I'll probably call this week.

 

[unsavory]

I'll probably call this week.

Did you ever get an answer to what that sound was? Mine has always sounded like that. It sounds like a diesel.

 

[Sage73]

Nope, but its a little better after switching to 93 octane and amsoil oil.

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