How old are the vacuum lines on a Mercedes Benz?
After 30 years the original vacuum lines are old, brittle and probably cracked. And, chances are, there was at least one fumble-fingered idiot who worked on this car at some point in the last 30 years.
What causes a leak in a Mercedes vacuum?
Another area of great leakage is the metering valves on the main supply line. There is a 3 way and 4 way connector on the valve. Be very careful removing the 2 connectors from the supply line metering valve. The nipples are small and very fragile and prone to cracking. If one breaks you will have to replace the entire line.
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.
What is the vacuum diagram for a Mercedes 450SL?
OK, so this is the vacuum diagram to a 1978-1980 450SL with the K-Jet system. Click the picture to see it full size. 3) Switch over valve – this changes the timing of the engine based on whether the AC compressor is running or not. 4) EGR Valve – part of the emissions controls.
After 30 years the original vacuum lines are old, brittle and probably cracked. And, chances are, there was at least one fumble-fingered idiot who worked on this car at some point in the last 30 years.
Where is the leak on a Mercedes vacuum?
Another area of great leakage is the metering valves on the main supply line. There is a 3 way and 4 way connector on the valve. Be very careful removing the 2 connectors from the supply line metering valve. The nipples are small and very fragile and prone to cracking.
OK, so this is the vacuum diagram to a 1978-1980 450SL with the K-Jet system. Click the picture to see it full size. 3) Switch over valve – this changes the timing of the engine based on whether the AC compressor is running or not. 4) EGR Valve – part of the emissions controls.
Do you need a vacuum pump in a Mercedes?
This digram does not show the engine vacuum. When diagnosing leaks in the Mercedes vacuum system, a vacuum pump with gauge is mandatory or should you have a smoke machine on hand, that would be the ultimate way to go. First, start by checking the vacuum tanks for leaks.
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.
Are there any problems with a Mercedes vacuum pump?
Typical Mercedes diesel vacuum pump. They are very reliable and easy to rebuild if need be. The most common failure is the check valve and internal diaphragm. The very first thing I do is make sure we have a constant supply of vacuum.