Determining Correct 1980 to 1985 Diesel Vacuum System Hose and Line Routing

When troubleshooting your vacuum system you must know where the hoses and lines go

On many diesels the diagram was on a sticker mounted on the front core support of the engine as you see in this picture for a 1980 300SD. But these stickers do come off and you are stuck with finding the right information online or in a manual. These diagrams may or may not help. We also have a number of diagrams and vacuum troubleshooting information in Kent's manual. 

Problem & Solution

Common among these chassis:


Non Turbo Late 240D


Non Turbo 300D



1981 to 1984 617 Turbo Diesel


1985 Turbo Diesel