Question about 2007 Mercedes-Benz ML320 CDI

1 Answer

Serpentine belt tension

I can not figure out how to get the slack out of the new belt i just replaced the altenator and the belt.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Mercedes-Benz Master
  • 76,691 Answers

The belt is tensioned with a spring loaded pulley on an arm. To ID this part start the engine and watch the belt go around the pulleys, when you gun the engine the belt tensioner pulley will jitter to adjust the slack.

Posted on Apr 16, 2014

Ad

4 Suggested Answers

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,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 3 Answers

SOURCE: problem with replacing serpentine belt on ml430

Routing can be a problem, wrong belt can be also as stated before. I had to take replace the idler pulley which i recommend doing when replacing the belt. I routed the belt then placed it into the idler pulley then slid the idler pulley onto the boss that that the idler pulley tightens onto. I thought it was the routing even took the belt back, but when i did the above I was done in 5 minutes after spending an hour an a half.

Posted on May 03, 2009

maklean
  • 1665 Answers

SOURCE: Have installed new belt on

You may remove alternator pulley and replace with belt over it.

Posted on Jul 14, 2008

01fordeb
  • 1033 Answers

SOURCE: How do I replace a Serpentine Belt on a 1994 E420?

The tensioner will keep the belt tight without having to adjust. It's on a spring loaded type arm. The tensioner is on a arm, if you look at the center of the roller you will see either a 1/2" hole or it could be a allen type wrench hole. You will need to fit a ratchet into the hole or an allen wrench with a pull handle for better leverage. Once you have this inserted into the hole, you will either push or pull slightly to compress the spring which will give you room to fit the belt over the last pulley. Once this is done the tensioner will automatically tighten the belt once you release the pull handle. You are set and ready to go

Posted on Jul 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I am trying to replace my serpentine belt on a mercedes 1995 c220 but having trouble on figuring out how to get rid of slack on the belt ........ dont have a diagram for it either ..... really dont wo


There is usually a belt diagram on either on the underside of your car hood or on the radiator support. And if it uses a serpentine belt there should be a spring loaded belt tensioner that will tighten the belt. But you should have to unload the tensioner to get the old belt off. So do the reverse to reinstall the new belt. Hope this helps.

Nov 27, 2012 | Cars & Trucks

2 Answers

What bolts do I loosen to release the tension on the alternator to put a belt on it


If your looking at your altenator you will have 2 brackets 1 holds the unit on the vehicle other bracket is sloted the sloted bracket is the tensioner besure to not overtighten leave a little deflection or you will wear out your altenator bushing /bearing.

Aug 21, 2011 | 1997 Isuzu Trooper

1 Answer

How do you get the serpentine belt back onto a 1999 lincoln continental? we can't figure out how to put slack in the belt to get it back on the alternator.


there is a belt tensioner pulley you must lever back to produce the slack needed to slip on the belt. There is a socket type cutout behind the pulley. put in the appropriate size ratchet handle or breaker bar and move tensioner arm back against the spring tension on the pulley. slip on belt making sure the grooves of the belt are in the pulleys correctly

Nov 02, 2010 | 1999 Lincoln Continental

1 Answer

Need to know how to put a serpentine belt on a 1995 302 ford motor


Below the altenator is a tensioning pully, insert a 3/8" ratchet or breaker bar in the square hole on the tensioner and release the tension on the surpentine belt and remove the belt. Route the new surpentine belt in place up to the altenator and take the tension off the tensioner and put the belt over the altenator pully. Double check to make sure the belt is riding correctly on all the pullies before starting. Crank the engine over several times before starting to seat the belt. f78f558.jpg

Jun 02, 2010 | 1995 Ford Mustang

1 Answer

Cant get serpentine belt on my truck


Try putting the belt on the alternator then slide it under the idler pulley last.

Feb 23, 2010 | 1994 Ford Ranger Supercab

1 Answer

How do i take of belt on a 1998 nissan 200sx?


There should be a tensioned idler pulley which has an internal spring to take up the slack. It will have a nut or a drive socket so you can attach a spanner and rotate it to relieve the tension. You will need an extension as the tension is quite high. Putting the belt back is easier with an extra person to hold the idler pulley back while you manipulate the belt.

Sep 05, 2009 | 1998 Nissan 200SX

2 Answers

Cant find drive belt tensioner bolt to loosen serpintine belt


The serpentine belt tensioner / pulley is on the front of the engine, and part of the belt 'routing'.

Its job is to put tension on the belt as it drives the other devices like the power steering pump, water pump, air conditioning compressor.

It is an aluminum casting that mounts with a single bolt to the engine. The pulley is attached to the arm.

There are a few ways to move / pry the arm inwards, thus releasing the tension on the belt for removing/installing: grab on the pulley bolt (15mm?) with a wrench, or some later models have an opening for a 3/8th socket wrench to attach to directly without a socket.

May 10, 2009 | Ford Windstar Cars & Trucks

2 Answers

I HAVE A BAD ALTERNATOR AND KNOW i HAVE TO TAKE IT OFF AND REPLACE IT WHERE DO i START.


Removing the Old Alternator Step1 Pull your Mazda into the garage or your work area. Turn the car off and let it sit for a while to cool. Step2 Begin by disconnecting the negative cable of the battery. Step3 Remove the serpentine belt from the pulley on the alternator. Do this by using a socket wrench to turn the serpentine automatic belt tensioner so that it allows slack in the belt. Then simply slip the belt off the alternator pulley. Step4 Locate and disconnect all the mounting bolts on the alternator, use a vehicle specific manual if you have any trouble. Step5 Disconnect all wires attached to the alternator then remove the alternator from the Mazda. Installing the New Alternator Step1 Slide the new alternator into place. Do not worry about the serpentine belt yet. Step2 Replace the bolts that held the previous alternator to secure the new one in place. Step3 Attach the wires to the new alternator the same way they were attached to the old one. Step4 Adjust the serpentine belt tensioner the same direction you did in Section One to put slack in the belt. Wrap the belt around the pulley of the new alternator and then remove the socket wrench from the automatic belt tensioner. Step5 Inspect the belt to be sure it is not snug and follows the path required in the pulley and belt configuration diagram. Step6 Hook the negative battery wire back to the negative terminal on the battery.

Mar 21, 2009 | 2004 Mazda Tribute

1 Answer

Serpentine belt replacement.


Locate the automatic belt tensioner, it should have a black plastic pulley on it. Insert a 1/2 inch breaker bar in the hole thats on the tensioner, and pull to relieve the tension on the belt. Slip old belt off the pulley and slowly release the force you have on the bar untill it stops moving. Route new belt, and move tensioner with bar to gain needed slack to get the belt on, Release tension, and remove bar. makeing sure new belt is in alignment.
Be careful...watch for pinch points, around your fingers and hands when performing this job.
Also, check the pulleys and idlers for wear before installing the new belt. They will wobble if the bearings are worn and should be replaced.
Good luck, hope this helps.

Mar 16, 2009 | 1994 Buick Park Avenue

5 Answers

Serpentine belt replacement


2.0L Engines
See Figures 11, 12 and 13
The accessory drive belt for 2.0L engines has no provision for manual belt adjustment, since these engines use an automatic belt tensioner. Drive belt slack is taken up by the automatic tensioner.
Movement of the automatic tensioner assembly during engine operation is not a sign of a malfunctioning tensioner. This movement is the tensioner self-adjusting and is required to maintain constant belt tension.
The belt tensioner has a belt length indicator. If the indicator marks are not between the MIN and MAX marks, the belt must be replaced.
0900c1528008d836.jpgFig. 11: Drive belt routing-2.0L SOHC engine with A/C 0900c1528008d837.jpgFig. 12: Drive belt routing-2.0L SOHC engine without A/C 0900c1528008d838.jpgFig. 13: Drive belt routing-2.0L DOHC engine

Jul 24, 2008 | 1999 Ford Escort

Not finding what you are looking for?
2007 Mercedes-Benz ML320 CDI Logo

96 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76682 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

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

Answer questions

Manuals & User Guides

Loading...