MartinWake

Hello, Today when I stated up my 2003 CL55 amg on a cold start it was making a ticking sound, I could rev up a little and the ticking would increase speed. I have my hood insulation removed so the engine is a bit more noisy to begin with. I did an oil change about 200 miles ago 5w-40, I live in Miami so it does not get cold here.

As soon as the cold start process ended the ticking went away and I did not hear it again at any rpm. Any idea what this could be? I drive the car hard but I always let the oil warm up before going to high rpms. If this happens again I will record it not sure why I did not think of doing that this time.

MartinWake

Anyone?

coupesedan

The K is a noisy engine, ignore most of the sounds it makes

MartinWake

I know its pretty noisy but I had two bmws with rod bearing failure so any sound the engine makes puts me on edge.

kevm14

It's ok, the rod bearings can't hurt you now.

MartinWake

Here is a video, a few seconds after this it went away. I only hear it on first morning start up

SICAMG

That sounds like a pulley. Pull the supercharger belt off first and fire it up again.

JakeAndBake

Absolutely agree with the above response. My tensioner pulley sounded just like that when it was on its way out.

MartinWake

Only on cold start it does that sound then goes away but I will take belt off and check

MartinWake

I removed the supercharger belt and the sound went away, it is the belt tensioner for the SC

MartinWake

Here is a video without the belt on a cold start no sound at all?? which pulley can it be? I am starting to think its actually the SC pulley because when I look at it straight the center bolt has a slight wobble to it...

MartinWake

your sc belt tensioner?

Travis R

Spin all the SC related pulleys with the belt off. If they make noise or feel "crunchy" replace them.

Ls1toAMG

The good news is that does not sound internal at all.

MartinWake

Yeah I was suripised it went away just by removing the S/C belt... those 3k mile oil changes coming in clutch!

MartinWake

They feel normal but the S/C pulley it self has a slight wobble to it not the whole pulley but the center part.

I still don't understand why its only on cold starts and then goes away.

SICAMG

Super charger pulley lightly scuffing the magnet when cold.

MartinWake

This is exactly what I was thinking... I took the belt off again today and I spun all of them with my hand but I do not feel anything out of the ordinary.

I also turned it on with the belt off and no sound at all, once I put the belt back the sound was there again until the car warmed up. Any ideas why it would do that only when cold?

I am gonna get another pulley soon could this fix the problem?

SICAMG

You REALLY need to spend some time on this your self. Your asking us to give you the answer and we can not. There only pulleys so no big deal.

MartinWake

I have been trying to figure it out but it does not make sense that its a pulley how does it happen only when cold? Do pulleys suddenly get oil now?
I already said I removed the sc belt and sound went away done we have confirmed its one of those. I spun all of them by hand and none of them feel weird or make any sound.

And what do you think forums are for lol that's the only reason most people make accounts.. just like I ask questions I also answer them in the CL part of the forums.