Order it online at Walmart and have it free shipped to the store closest to ya for pickup.

Get the Shell Rotella Motor Oil for less at Walmart.com. Save money. Live better.

And do the Seafoam cleaning mentioned on the site....

https://www.crossfireforum.org/forum...tml#post677672

 

OK, here is the video of engine running. It seems like the noise is louder on the left side of the engine. When in park and in neutral the engine idles around 700 rpm so less knocking is heard. When in drive or reverse the rpm drops to 500 and thats when most knocking is heard. See video here.


Also I included some picutres of the 2 spark plugs I pulled. They look rusty. But I think that might be due to Chevron Techtron fuel additive that I used. The gap is about .038" - which is good.

 

If you seal them up before you dry them out inside the water will be trapped in there all the time, either as vapor or water depending on the temperature. If you seal humid air in there it will do the same thing.

 

Those look okay to me. Didn't find the video attached though.

 

Click on the word here in red.
Sounds like a bearing of something run by the serpentine belt to me.
Take off the belt and check them.

 

Aha... Got me on that one! Thanks for pointing it out.

Okay my friend, I even broke out the good headphones for this one.

I am sorry to give you bad news, but that sounds 100% like a bad rod bearing to me. The resistance from the added friction could also explain your 'quick deceleration' and low engine idle speed.

I really-really would love to be proven wrong, but as far as I can tell, it's certain.


Not sure what your budget would be in this case, but it does make a good argument for swapping a V8 into place! Not sure what a repair would look like, cost-wise.

 

Yeh that would suck if its the rod bearing!

 

I have 163k and the same noise. The Mercedes shop I go to said it's normal for these engines to be noisy as they age....but I still don't buy it. I'm going to mention that next time I go in for service to see if that is something they've heard of on this engine.

Were you able to get any confirmation on the suspected cause?

 

OK, maybe I'm just going bananas over this, but lately it seems to me that sometimes the noise is gone or much lower. This week engine light came on. I ran a scan and it showed code for secondary air injection pump. Now, a bit of history, I replaced the pump a few months ago because the motor brushes burned through the casing of the motor and obviously motor was not working anymore so I had the same code and engine light. This time I checked the relay module, and re-soldered relay pins which looked like cold soldered joints and cleaned the relay contacts which were somewhat burned. Cleared the codes, and now for two days no engine light so I think thats all set. Now what I did notice in the last few days is that my "rolling down the hill at idle" seems much easier. The car seems to free-roll at idle better now.

 

... so I got rid of the car

 

So I guess it's too late to tell you what's wrong with it eh?

 

I have an 04 with under 50k and mine sounds like this also. I have been trying to get rid of it and am now starting to get serious about it and wondering what you guys would recommend?

New plugs?
Seafoam?
Something really expensive? (please no! haha)

 

I also have the very low idle of around 500, check engine light is not on.

 

Well, if you know the cause and share I'm sure it would help others. By the way, I'm getting an SRT6 Hopefully it wont have same knock issue.

 

Nice! Let us know how that works out for ya.

 

Anyone figure this out? Updates would be helpful to others, even from a few years ago. Thanks

 

The OP got rid of the car before the problem was solved, that is what I understood from his reply.
So, no resolution was made.

 

omg! I have never heard of this stuff!

 

Hey all.

The video shows the exact sound my car is making. An odd knock or clunk only when in drive or reverse, not in neutral. Anyone ever solve or get closer to a diagnosis? Rod Bearing? Let me know!

Thanks!