brookman

I am working on a 79 928 for my friend. What is this hose? One end is connected to the head the other to a breather hose that goes to the air cleaner. as you see....anti freeze us coming out of the head side of the hose.

BC

Uh, there isn't supposed to be coolant in that line at all? That was a question - sort of retorical I guess. If that a breather hose, then the coolant is errant, and the reason that the hose disintegrated. Notice that there is sheathing INSIDE?

If I'm wrong, then never mind.

brookman

I figured it out - but I don't know why they did it that way. There is supposed to be coolant in that line. There is a sealed tube in the breather line. I figured it out after I blew on the connector on the air cleaner side. This must have been to warm the air for some reason.

Vilhuer

Coolant line is there to keep crankcase breather hose open in freezing temperatures. Without it condenced water could froze up and block fumes going into intake creating pressure inside crankcase. This causes weakest seal (usually crankshaft seal) to jump out. In 928's case I don't know what it would be.

Every now and then when new model comes out we have 'epidemic' here at first winter after introduction and model in question gets bad reputation by spilling out oil in worst possible time. Usually by next winter manufacturer has modified some parts and done recall for all affected vehicles. Almost every maker seem to get it wrong every now and then.

If car is not driven in below zero celsius temps you can bypass breather and connect water hose end to end directly. This will also prevent coolant ever geting to oil gallery or intake through that hoses internal pipe.

Erkka

1992 928 GTS will not see winter ever again
Oak Green Metallic 22L
Classic Gray MX

heinrich

I'm glad now I have a later model car