Corrosione sail drive

[st00042]

Questo è un estratto da un forum in inglese dove spiega com'è isolato il piede volvo

Citazione:There are 8 bolts holding the flywheel cover onto the engine (the gearbox is bolted onto the flywheel cover). Each bolt screws into a female hole in the engine block. However, the between the flywheel cover and the engine block is a gasket arrangement, so there can be no electrical contact between the cover (and gearbox) and the engine. Each bolt head mates against an insulating washer between the bolt and the cover, so again there's no electrical connection between the cover and the engine. Also, the bolt-hole in the cover is much wider than the diameter of the bolt, so the threaded section of the bolt is insulated from the cover by an air gap or nylon bush. The final bit of the whole setup is that the gearbox shaft doesn;t make physical contact with the engin because of the vibration damper plate. THis has 2 metal plates; one mates with the gearbox splines and the other with the flywheel. The 2 plates are joined by a rubber sandwich which serves 2 purposes - it transmits the drive/torque between the damper plates and it provides an electrical barrier. So between the gaskets, the washers, the air gaps and the rubber there is no electrical path between the engine and gearbox.