Question about Mercedes-Benz B-Class

1 Answer

Noisey drive belt, possibly alternator, belt

Mercedes a160 1.6 petrol, non air con model.
noisey drive belt/pulley noise at idle, gets worse with increased revs.
suspect bearing on alternator, belt tensioner or idler pulley.
dont think it's the water pump, not a typical noise of a water pump, its more of a whining noise than a screeching noise that you would get from a water pump.
these cars are on a timing chain so the noise rules that out!
are you aware of what it is most likely to be? i've been told that these cars are a right pain to work on!!! can i change the parts without dropping the engine?

Posted by on

  • yadayada
    yadayada May 11, 2010

    what is the question here, you have answered it already, the drive belt or the pulley's

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 432 Answers

Sounds like idler bearings but you have to release the tension to check,Also you can check the rest of the pulleys also at this time. I dont think you have to drop the engine.

Posted on Oct 06, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Screaming noise coming from motor gets louder as rpm changes gears sounds like something screaming


if not alternator ,power steer pump,air con ,water pump \
serp belt tensioner or idle pullys

check crank pully is not running out of true

could be serp belt squeal
replace the serp belt

2004-dodge-ram-1500-slt-4.7l-rlvjad5rfjfbkkiwkdzzrtel-1-0.jpg

Mar 11, 2017 | Cars & Trucks

1 Answer

Strange noise on rover 75 when idle not all the time


is it a diesel? if so check the crank pulley. or the aux. drive belt tensioner if its the pulley the noise will get worse with more load, ie. ac or electrical loads

Feb 16, 2014 | Rover 75 Cars & Trucks

3 Answers

Making loud screeching noise


check drive belt driving altanator and air con it sounds like it needs adjusting

Dec 30, 2013 | Saab 900 Cars & Trucks

2 Answers

What happens when serpentine belt falls off on ml320


Yes everyvthing will stop working power steering the water pump will not work hence the over heating yhe battery will not charge air con wont wirk compressor wont work there cheap enough andceasy enough to replace about £18 for belt any garage should only charge for 20 minuets work its that quick to do if you can get the diagram on which way it goes ( google images ) then you can try it yoyr self its easy to do

Apr 16, 2017 | Mercedes-Benz ML320 Cars & Trucks

1 Answer

Makes squealing noise


You need to check the belt that drives the alternator for proper operation. The belt may be old and worn, or a pulley may be not freewheeling, but seized or with a bad bearing. Possibly the tension on the belt is too loose from a worn out tensioner.

First, spray a little water on the belt with engine running and see if noise goes away, possibly a worn belt. Pull the belt off and check all pulleys. Spin them by hand and see if spins easy, no rough feeling or a catch when spun. Check alternator pulley, idler pulley, tensioner pulley, PS pump pulley and A/C compressor pulley-check them all for free wheeling. If good check the tension on the belt when installed. If unsure, have a mechanic check tension with a belt tension tool.
If belt is good and pulleys good, check alternator output with a voltmeter on the battery with engine running. If voltmeter is below 13.5 volts, the charging system is still not working properly. Have it checked out.

Sep 29, 2013 | 2000 Mitsubishi Galant

1 Answer

Hello! I have an 06 Trailblazer and its making a loud whinning noise. It gets louder when i press the gas pedal. We have replaced the idler pulley along with the belts. We have also taken the alternator...


Have you tried running the engine for a minute with the belt removed? If the noise is still present when you do this, then it is not related to the belt or any of the pullies. I have seen "whining" noises coming from the air induction system - namely, vibrations set up by the idle air control and reverberating in the intake. This will not go away with the belt removed.

If the noise does go away with the belt removed, then the problem HAS to be one of the pullies or components that are driven by the belt. Power steering pump a little low on fluid maybe? Or possibly a rough bearing in an idler pulley? Spin each pulley by hand and see if it makes any noise. You should not be able to "hear" them spin. If you get any kind of rattle or roughness when spinning the pulley by hand, then this is most likely your problem-child.

Oct 05, 2011 | 2006 Chevrolet Trailblazer

2 Answers

Sqeaking from the accessory belt drive. could be a bearing in one of the pulleys, the pump, the alt or the belt tension has weakened. It occurs off and on, usually just off idle but sometimes at idle. Is...


common cause is the belt gets worn and stretched, yes the tensioner is suppose to keep its tension but also the tensioner gets weak and all it takes is a couple slips of the belt to harden and you will get a squeal. Spray WD 40 on tensioner, idler pulleys, alternator behind pulley, not on belt or where belt rides on pulleys but at all bearing locations. Did squeal stop? If not replace belt. Usually a chevy water pump will leak, or grind not sqeak unless there is rusty non lubricated so called coolant in it which 1974 maybe but 2007 na im sure you didn't neglect this baby. You can also inspect the belt carefully, possibly buy a can of belt dressing and spray belt but do make sure you use a ratchet and check your belt tensioner for smooth non sticky tension pressure.

Jan 10, 2011 | 2007 Chevrolet Silverado 1500 2WD

1 Answer

My dodge sprinter 213 cdi with AIR CON though


Over to right pulley (bottom the a/c) then over rider pully to top left pully to alternator to fan down to drive to tensioner

Feb 27, 2010 | 2002 Dodge Sprinter

1 Answer

Squeaking noise front drivers side of engine


Loosen the belts [ you do not need to remove] so they are free of tension to all pulleys.Start engine , if noise goes away either belts were too loose [ common on lx 450] or you have a worn & noisey pulley /bearing.have seen idler pulley below alternator have dry / noisey bearing.Otherwise if idler is ok it has to be another belt driven assessory , ac clutch,water pump & or fan clutch.Good Luck.

Jan 17, 2009 | 1997 Lexus LX 450

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

847 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

yadayada
yadayada

Level 3 Expert

79865 Answers

Joseph Prosser

Level 3 Expert

772 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...