AMG C63 engine noise

Humming Noise Front End- Any Ideas? - Ford Explorer and Ranger ...

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Dec 18, 2008 - 19 posts - ‎16 authors
Have a 98- Eddie 4.0 SOHC, 4WD with a 100,000 mi. When driving it has a humming noise, it almost sounds like a bad tire, or a ... I start to hear the humming noise at 20 mph, it is very loud at 40 to 50 mph ... 94 XLT-95 FX4. humming gets louder as speed increases
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1.Is the noise coming from the inside of the engine or the outside of the engine or from some other area of the car not part of the engine bay?.
If it is coming from the inside of the engine ....
1. How many miles or kms has the vehicle done
2. How many miles or kms since the last engine oil change
3. What grade of oil was used for the last oil change (eg. 5w-30 or 10w-30 or some other).

Your hearing lifter noise common in most cars in cold weather I have a 2001 sc1 same engine as yours here's how to get rid of that ticking sound go buy a quart of Lucas synthetic motor treatment change your oil and leave it 1 quart low add the Lucas synthetic oil stabilizer within 1 week you will not hear the noise agian reason your hearing the noise is there's no oil at the top of the engine on a cold start oil when cold is thicker hints why your noise in your engine what Lucas does is eliminate the dry start by the way my engine has 288,000 and does not use a drop of oil after you use this product you should use it every oil change you will see your car will thank you regards Chris

YOU GOT IT. I'm sure the oil pressure went low when the car was on ramps causing a CE light. The louder noise poss wrong belt or exhaust leak!?

oil bubbles ? oil splashes under valve covers across the valve train opening the valve cap may get oil splash-- but oil bubbles oil may foam a bit from being old or if coolant got in it and wouldnt bubble out of cap but bubbles --- and oil splash is normal when opening oil cap with vehicle running

A lot of times a ticking sound is the valves, which usually means a valve job when it gets bad enough.

But if it is a gentler tick sound it could be what is know as a wrist pin knock, which in some cases is not a big deal and others a big deal.

If the sound gets louder and louder, you will have to do something about it. But if it stays pretty constant then you monitor it, and look for other indications such as losing power, excessise oil use, etc.

If the rattling changes with the revs of the engine, it might be that the valve compensators are either worn or not getting enough lubrication. 20V engines have quite small oil passages travelling to the head. They tend to clog up with gunk if the oil change is not frequent enough.

Open the oil filler cap at the front right head. Close to the right air intake. It has the AMG logo on it. It can be twisted open by hand.

Is the merc dealer serviced??, sometimes if you change brands of oils in synthetics >>semi synthetics you will get excess oil useage. City driving will tend to use more oil, but the merc should be able to do its 10,000k betwwen oilchanges.
Anyway, check what oil is being used in both weight example 0-60w, 5w-30 etc and by brand, check that the API oil spec meets what is required for your vehicle example API SM, SJ, SL etc.

Sounds like a stuck valve lifter. I'd use some oil additive for unsticking lifters.