What kind of vacuum line does Mercedes use?
Mercedes uses a combination of plastic vacuum line and rubber connectors to route vacuum throughout the engine bay. The rubber ends of these connectors break down over the years and eventually allow air to enter the system.
Why is my vacuum not working on my Mercedes?
Use you hand pump to test the various check valves and to pull vacuum on actuators, reservoir, and other moving mechanisms. In the case with this car the main culprit was the 5 way connector. It was original and swollen with oil vapor and did not grip the lines very well.
What should I do if my Mercedes air conditioner is not working?
Last but not least, if the airflow in your Mercedes seems sluggish, take a look at your cooling fan unit. This control module is an electrical component connecting the fan to the rest of the system.
Where is the vacuum reservoir on a Mercedes?
The reservoir is located in the truck on the sedan models and behind the drivers front fender on other models. Closer view of the lines. Now we will check the supply to the check valve. This side will have full vacuum since it is supplying most of the lines that come through the firewall.
Use you hand pump to test the various check valves and to pull vacuum on actuators, reservoir, and other moving mechanisms. In the case with this car the main culprit was the 5 way connector. It was original and swollen with oil vapor and did not grip the lines very well.
How to test yellow lines on Mercedes vacuum?
Replace the 2 one inch pieces of vacuum attached to the check valve also. To test the yellow lines, hook up your hand pump to each line with the other blocked off, and see if you can pull and hold a vacuum.
How to troubleshoot your Mercedes Benz air conditioner?
Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.
The reservoir is located in the truck on the sedan models and behind the drivers front fender on other models. Closer view of the lines. Now we will check the supply to the check valve. This side will have full vacuum since it is supplying most of the lines that come through the firewall.
What should I replace my vacuum line with?
Replacing the crap rubber factory vacuum lines with more crap vacuum lines What you can usually find locally for vacuum line is terrible. The rubber gets old fast and cracks, as well as not keeping a solid conneciton and slipping off. We suggest upgrading from a brittle rubber to silicon vacuum lines:s
What causes a vacuum line to leak at idle?
Having a good seal from the piston rings most people understand, but when running a very large and aggressive cam, often there will be more overlap in the duration between intake and exhaust valves that will cause a loss of vacuum at idle. This loss of vacuum causes the motor to struggle when idling at low RPM’s.
Why is there no vacuum in front of the throttle plate?
In front of the throttle plate there will be no vacuum present due to the fact that it is open to the air box and therefore atmospheric pressure. Also remember that the amount of vacuum a motor will have will be based on how good the piston ringsare, and also the camthat the motor is running.