How to replace timing chain tensioner on Mercedes Benz W203?
If you do not have a retaining pin you can use a 5mm Allen key. The alternator is held to the engine by two bolts. Use an E14 Torx and remove the two bolts. There is a spacer that is pressed in the mount that you may or may not have to press out a little to get the new alternator installed.
How long does it take to replace tensioner on Mercedes Benz?
Replacing the drive belt tensioner on the Mercedes-Benz engine is relatively easy. It requires a few basic tools and approximately 30 minutes. This guide applies to the majority of Mercedes-Benz cars.
Why do I need to replace my timing chain tensioner?
The timing chain tensioner is responsible for keeping the proper tension on you timing chains. It does this by keeping constant pressure on the guide rail. If you are starting to get chain noises from the engine, especially on cold start ups you should inspect or replace the tensioner right away.
What’s the best way to change a tensioner?
Use a 17mm socket to move the tensioner up (service) position. Insert a metal pin in the tensioner hole to keep the tensioner up. A 5mm Allen wrench or bolt can be used as a pin. The pin needs to be strong enough to withhold shear force.
When to replace a Mercedes Benz timing chain tensioner?
Failure to maintain constant tension can lead to the timing chain jumping a sprocket and then catastrophic engine failure. The first step in replacing the timing chain tensioner is to disconnect the battery.
Where is the tensioner on a Mercedes W203?
Unplug the harness, pull the plastic cover off the cable connector and use a 15mm socket to remove the cable. Now you can slide the alternator out of the engine. You will need to move the auxiliary coolant hose out of the way. Located on the engine block between the upper mounts for the alternator is the tensioner.
How much does it cost to replace a tensioner on a Mercedes?
Local repair shops will charge between $280-$450. The DIY cost to change the Mercedes-Benz drive belt tensioner ranges between $50-$120, even if you have to buy the tools needed for this job and a new serpentine belt. 06 – 06 MERCEDES-BENZ C280 3.0L 2996CC 183CU.
Use a 17mm socket to move the tensioner up (service) position. Insert a metal pin in the tensioner hole to keep the tensioner up. A 5mm Allen wrench or bolt can be used as a pin. The pin needs to be strong enough to withhold shear force.
If you do not have a retaining pin you can use a 5mm Allen key. The alternator is held to the engine by two bolts. Use an E14 Torx and remove the two bolts. There is a spacer that is pressed in the mount that you may or may not have to press out a little to get the new alternator installed.
Where does the timing chain attach to the engine?
The timing chain or belt attaches to the camshaft, in the top half of your engine, and the crankshaft in the bottom half, ensuring that they turn at the correct speed and time so that your engine runs smoothly.
What happens when your timing chain goes bad?
A stretched timing chain will hurt engine performance and increase emissions. If this happens, the computer will turn on the check engine light and store a diagnostic trouble code. 2. Poor engine performance: A stretched timing chain will affect valve timing.
When to replace timing chains and guide assemblies?
The two DOHC timing chains and guide assemblies should also be replaced at the same time. As for timing belts, they do not stretch with age, but become weak internally and may fail with no warning. Consequently, a visual inspection of the belt may not reveal much. If the mileage is not known, replace the belt.