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Mercedes Crankshaft Pulley Harmonic Balancer DIY

Mercedes Crankshaft Pulley  Harmonic Balancer DIY - In this tutorial, we cover usual harmonic balancer/crankshaft sheave issues as well as instructions on the best ways to replace it. This is a common problem with Mercedes-Benz outfitted with the M112 and also M112 engines. These two engines are mounted on lots of Mercedes-Benz models made in between 1995 as well as 2005 including E-Class, C-Class, S-Class, ML-Class. This is a common issue on Mercedes-Benz versions finishing with 240, 320, 430 as well as 500.

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Exactly what is a Harmonic Balancer?

A harmonic balancer (also called vibration damper or crank wheel) is the main pulley that owns the accessory belts on a Mercedes-Benz engine. It is attached straight to the crankshaft. The harmonic balancer has two metal parts. The external ring that owns the serpentine belt and also the facility of the crank wheel. Both are steel which are signed up with by a rubber damper.

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Its primary objective is to rotate the serpentine belt. It likewise assists to soak up a few of the engine resonances by the use rubber element between the crank pulley outer ring as well as the facility of the pulley.

Because of warmth, the age of automobile and typical wear the rubber falls short, creating excessive crank pulley vibrations as well as catastrophic failing sometimes. It should be changed. The good news is that the engine doesn't have to be gotten rid of and also it could be changed by a DIYer.

Because the crankshaft pulley-block drives the serpentine belt and all the devices consisting of the water pump, generator, power guiding as well as a/c compressor if it fails you won't be able to drive your lorry.

Signs and symptoms of a bad harmonic balancer:

This is a list of common signs and symptoms of a bad harmonic balancer on a Mercedes-Benz.

Crankshaft pulley extreme movement
Wheel external ring separating from the center
Break on the harmonic balancer pulley rubber
Noise from engine
Crankshaft pulley wobbles
If you notice any of these signs it is far better to replace the harmonic balancer before it totally stops working.

Mercedes Harmonic Balancer Removal Tool
In order to get rid of Mercedes-Benz harmonic balancer, you will certainly need Mercedes crankshaft pulley-block tool to hold the crankshaft in place and also quit it from rotating. The device can be purchased online in websites such as as well as eBay. Mercedes harmonic balancer tool prices between $50 as well as $80 USD.

Guidelines on ways to change harmonic balancer
The good news is that you don't should drop the subframe or get rid of the engine to replace the harmonic balancer. It could be removed with the engine in place.

Action 1: Open hood
Draw the hood launch on the lower left edge of the dashboard.

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Most likely to the front of the automobile and also draw on the hood handle. Next off, lift as well as secure the hood in the upright placement.

Step 2: Get rid of radiator fan

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

On most Mercedes-Benz models you will need to eliminate the radiator follower and also shroud.This is needed as there isn't sufficient space for you to hold the harmonic balancer in position and also at the very same time utilize an outlet to get rid of the bolt.

The radiator follower can be quickly eliminated. There are clips on the side of the fan that you should press and also pull out the fan.

Prior to you draw the radiator fan upwards disconnect the electric connector.

If you have a pre-2000 Mercedes-Benz geared up with a viscous fan, it will certainly need to be eliminated also. To eliminate the fan you will need Mercedes-Benz thick follower tool.

Right here is a video clip on the best ways to replace the viscous follower.

Action 3: Eliminate serpentine belt

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Get rid of the serpentine belt.

You will certainly have to put an outlet on the belt tensioner and also draw it up until you can glide the belt out.

Step 4: Loosen up the crank pulley bolt

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

You will certainly need to make use of Mercedes harmonic balancer tool to hold the crankshaft pulley-block in place as you relax the 27 mm bolt.

You will utilize the harmonic balancer tool to maintain the crankshaft from transforming. Next off, make use of a 27 mm outlet on the bolt to loosen it up. You will certainly have to utilize a breaker bar such as Neiko 00206A 1/2 Inch Drive Premium Breaker Bar, 24 ″ Length|Cr-V Steel to get this screw loose. If you can not get it loosened you can include a cheater pipeline to your breaker bar.

You will be using over 200 Nm of pressure to the screw which calls for is a significant quantity of power.

Tip 5: Install the new harmonic balancer

Mercedes Crankshaft Pulley / Harmonic Balancer DIY

Pull the old crankshaft pulley out. Now it is time to mount the brand-new harmonic balancer. You will certainly need to hold the crank wheel utilizing the harmonic balancer device. Next usage a breaker bar and a cheater pipe/extension to loosen up the screw.

The last step is to reinstall the serpentine belt.

Harmonic Balancer Bolt

This is the central screw that safeguards vibration damper to the engine crankshaft.

Bolt: M16 x 1.5 x 77 mm long
MEGABYTES part number is 112 031 00 71
Outlet Size: 27 mm regular
Torque Specs

Clockwise instructions-- tighten
Torque: 147 ft-lb or 200 Nm then an extra 1/4 turn.
How much does it cost to transform the harmonic balancer on a Mercedes-Benz?
A car repair shop or a Mercedes dealer will certainly charge in between $350-$ 700 to change the harmonic balancer sheave.

If you alter the harmonic balancer yourself it will usually cost you around $150. You will certainly spend around $50 for the harmonic balancer device and around $100 for the crank pulley itself.

Best rate on Mercedes-Benz harmonic balancer
You have a couple of choices when it involves replacing the harmonic balancer. You could opt for the utilized OEM balancer or set up a brand-new aftermarket harmonic balancer for under $100.

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