rattle noise

Waugh

New Member
Joined
Jun 9, 2009
Messages
3
Reaction score
0
Hi,

I have C180 w202 1998, Elegance, now with 73K miles on the clock.

Can anyone help please or at least put my mind at rest to the problem?

Over the last month, I have noticed a rattle noise at low revs and the engine is under some load. i.e. idling with air-con on or pulling away slowly.

The sound appears to be coming from the front of the engine, fan belt area.

Also I have noticed that it's idling slightly rougher than it used to.


The rattle is the same when the engine is cold or warmed up. Whilst at higher revs the rattle disappears and the engine runs smooth, even when accelerating hard.

When you put the steering on full lock the noise gets louder

Does anyone have any idea what could be causing this?

I have changed the serpentine belt (fan belt) tentioner as someone said it might be that.

All the other things connected to the belt (a/c, power steering seem to solid with no movement)

If anyone has any ideas it will be most appreciated.

Mike.
 
OP
W

Waugh

New Member
Joined
Jun 9, 2009
Messages
3
Reaction score
0
  • Thread Starter
  • Thread starter
  • #3
Hi Malcolm

I replaced the tenstioner (5) on my MB but it didn't have a damper on it (29)
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
331
Age
86
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Hi Malcolm

I replaced the tenstioner (5) on my MB but it didn't have a damper on it (29)

May be someone took it off, if the tensioner has been replaced, then is the damper pulley OK and running true
 

Xtractorfan

Senior Member
Joined
Nov 16, 2007
Messages
6,084
Reaction score
156
Your Mercedes
S class
I have heard of a similar problem before on a c180 and it turned out to be a duff injector.. worth getting it checked on a star diagnostic ..
 
OP
W

Waugh

New Member
Joined
Jun 9, 2009
Messages
3
Reaction score
0
  • Thread Starter
  • Thread starter
  • #6
Hi Malcolm I'll check that

Thanks
 

rpe2

Senior Member
Joined
Sep 25, 2006
Messages
2,863
Reaction score
2
Age
43
Location
Silchester
Your Mercedes
His: 2018 E220 d; Hers: 2016 SMAX
My old 124 with a 111 engine used to rattle when idling. It was the camshaft adjustment unit. I just turned the radio up.
 

Mat995

New Member
Joined
Jun 10, 2009
Messages
4
Reaction score
0
I had exactly the same on a 98 C200 Elegance. I ignored it and I drove the car for three years until I changed the car. The noise never got any worse and it never actually caused a problem. Hope that helps.
 

brandwooddixon

Senior Member
Joined
Jul 31, 2006
Messages
3,356
Reaction score
172
Location
Wolverhampton
Your Mercedes
CL500 Bluefficency 2012
My old 124 with a 111 engine used to rattle when idling. It was the camshaft adjustment unit. I just turned the radio up.

Yes that's one way to get rid of odd noises. I shall have to give it go myself.

Another very effective way, that I've found, to get rid of odd car noises, is to leave my wife at home.:D
 


Save 30% on RAC Breakdown Cover
This year...next year... and every year you stay with RAC
Prices start from only £35.35*
This offer is available to all MERCEDES CLUB members and their immediate family**
Top Bottom