B18b Vacuum Diagram. Adjustable vacuum regulator is on the leading edge of engine management. Also the instructions of repairing and adjusting the carburators and choke control are included.
Standard motor pcv valve. The pcv system is occasionally the source of some confusion because you will notice that between the b18 and b20 diagrams below the direction of flow of gasses at oil filler cap changes and the pcv valve is eliminated on the b20. While this process keeps our streets clean the added mixture can lead to valve deposits and pre ignition.
Engine diagram volvo b18 engine diagram.
Pcv valve by standard motor. It has been proven to regulate crankcase vacuum and hold a steady level through extensive testing. The diagram below shows the vacuum lines for a d16a6 with a d16y8 manifold and b18a1 tb. All coolant lines are run the same as stock.