I did a search and can't seem to find an answer.

What is the time period for an oil pump to be change out on the c230?

Does this needs to be change? What other parts are recommend do o this work since it might end up with take some parts out to get to it?

Estimate cost?

Unless the oil pump fails, there is usually really no need to change it.

Saw a quote for the work recommended.

Is there any reason that leads to this failure of this part?

Also if it does fails and wasn't aware of it, what other parts will it cause damage to?

if u have weak oil pressure other than that leave it alone

Here's an update.

I went and try to pin point the problem. It sounds like its on top of the engine driver side.

All the belts and pulley sounds okay and looks new.

I can really hear this noise when I am in the drivers seat. Really loud and its right under my feet. There is a slight vibration when this noise resonate.

It gets pretty loud on the low rpm and seems to change in loudness as I add gas while driving and you can tell as it downhill as when slowing down.

Anyone with this experience on the v6 engine? I have a 2006 model. I did a smog check and it has pass with no issue, tech says they don't know what it is and is sure its not from the exhaust system.

Pleas help, I hope its not related to the transmission.

As mention earlier, a tech said its the oil pump and I know we mention this car does not have oil pump issue.

Any ideas guys / gals?

Can th8s be the engine mint or the transmission mounts?

Just try ling to keep my sanity with this issue.

RU sure the tech does not mean the transmission oil pump. If TC or input shaft (which drives the transmission oil pump) bearings fail they make a high pitched whine as you rev the engine.

Can you explain or post the noise.

oh darn....

I think that is probably what it is.

It's has a little whinning noise and seems to going directly when the engine is engage. Add gas or when it downshift while slowing down.

Noise occurs at lower rpm and seems to fade at higher rpm. It also quiets down when the car warms up.

The noise seems to be on the driver side area of the engine and can be also right on top of the engine.

I can really hear this in the driver seat. The shift stick vibrates a little when the noise is there. It sounds like it at the bottom of my feet where the pedals are.

I also hear a hiss noise in the back of the car while I was trying to pin point the area underneath. It hisses intermitently and seems to be in the rear wheel area.

Glyn,

Here is the video of what I tried capturing of the noise I am talking about.

It goes.. whooooooooooooooo

Engine:
http://www.youtube.com/watch?v=7RxE8iwURa8

Interior:
http://www.youtube.com/watch?v=kRbmbg_Lymo

The interior whooo noise while I gas it is what i also hear when I drive when adding gas or when it downshift while slowing down.

any ideas?

What are the symptoms of the balance shaft issues?

Typically the balance shaft issue, throws CEL's long before there is any real damage to the engine. Once the sprocket wears enough, the timing chain could slip and cause some serious damage, but that is rare as far as I know about the issue.

I think Glyn is on the right track, that is may be transmission input shaft bearings. It sure sounds like bearing whine to me.

I wish you had revved it but it sounds like TC/input shaft bearings to me. You better get that checked soon.

Thanks Glyn. I'll have the tech look at it and confirm.

About the revved part. I had it, i was in the driver pit revving. It's not as loud as if you sat there, which is werid. Perhaps my mic has a noise canceler. haha

Yea, I revved it and you can hear the noise when I revved it. That noise is 10x louder when you are sitting there.

The sound clip of the revved part is on the second clip noted interior.

Sorry - I did not listen to the interior clip. Yes - after listening to that I'm even more convinced it's TC/Input shaft bearing noise.

I really hope I'm wrong but having heard a few before that is what they sound like.

Has this transmission had it's 39K mile services?

Good luck! It's fortunately not the most expensive repair you can do on these transmissions. Cost of US labour is what will kill you if it is what I suspect.

Awwww.. i am afraid of that reply.

So what type of work is this consist of. I doubt the previous owner did any flushing of the transmission. It's at 77k miles.

So does the whole engine has to be dropped to get to this part?

How much do you think it will set me back for the repair?

I am going to do a full tune up since I got owned this for the 2nd day.

Sorry for being a noob, what does TC stands for? Transmission cooler?? Transmission converter?? Please forgive me for being a noob.

TC = Torque Converter. Don't worry - we are all here to learn.

The transmission has to be removed - not the engine. In South Africa you would be in for about $2500. In the USA I really don't know.

Ouch... Well compare to what I got already from a mb tech, he mention it runs min of $3500.

There goes my pocket, a hole is formed.

Is there any other thing I should work at while doing this? Full flush? or is that part of it since I have to remove the transmission.

Any other parts to consider working on?

Thanks!! Glyn for the input.

Once they make a noise like that an oil change will not help. From your exterior clip that noise is coming from the back of the engine where the TC is in the bell housing. I will try & find a clip of another car with this problem. I've seen one somewhere on the net.

Thanks.

Just wondering, how does this issue start? I mean, this is 2nd to last year for this model before than changed it, so how and why does this issue even become such a big issue. Can it be a manufacture defect? Or is it a failed to do maintenance?

Just want to understand to prevent this from happening again.

Is the older V4 enginee have this issue and should have oil flush? Or is this more from something else?

It is usually caused by lack of maintenance. These transmissions really need an oil & filter change at every 39K miles. You are lucky on the 722.9 7 speed transmission you are able to drain the TC. On the 722.6 5 speed auto fitted to cars after 1999 they deleted the TC drain plug so you have to flush if the oil is badly degraded. No flushing is required on 7 speed cars - only a complete oil & filter change.

This was TC/Input shaft bearing failure & finally blew the seal out & spayed oil all over the place. Required new torque converter, bearings, seals etc.

Sound familiar?

http://www.youtube.com/watch?v=_1ecpmF2cM0

AWWWWWW mannnnn...

Yes.. that is the noise!!!! Awwww... cr*p!!!



So the owner end up fixing it.. Is that one of the forum members, if so, who?

Just want to see how much it end up costing him/her.

That person was a member on here, though I can't remember the username.

Just one more reason to avoid the 7G. You're right about it being the second to last year model for the W203, but it was still early for the 7G transmission. It's no secret what I think of that thing.

The 722.6 may be old fashioned in comparison but it is not often you hear about big expensive failures on them, even after 100+ thousand miles of no maintenance.

Glyn will disagree, but I'd have told you to avoid the 7G had I saw a thread where you were considering swapping your 04 to an 06.

Here - found it:

Here's an update:

As per all your suggested failed parts and it's 100% on the dot. It's the Torque converter, Pump, seals, bearing that has failed. See attached pictures.


I was told that the seal was stuck in the pump and end up having the whole thing needed to be replace. The Torque Converter is all mared up and need to be replace.

Hopefully, this can be filed as a noise where others come across can use as the diagnoise and a possible fix.