Blow By System Hose - Wet with oil?

I would not be alarmed at all but you can order a complete replacement hose kit from many vendors only, i would start with replacing the hoses first as they crack inside which you can not see unless you remove the hose so yours may be cracked due to heat etc i have been there many times and replaced these now at every service. if the new hoses get wet then you need to explore where the leak is coming from. Now I am wondering if you were not doing the oil changes yourself a sloppy mechanic can make a mess removing the oil filter getting that hose wet very easily with, something else to consider

 

I'd suggest that you'll want to check the entire oil vapour recovery system for blockages - not just those hoses, but the connecting pipe, the canister they connect/drain to, and the drain line from the canister to the front of the engine block (middle of block, lower down). IIRC there are mesh screens in the cam cover ports that the hoses connect to, you'll want to check that those aren't blocked.

A blockage somewhere in that system could be causing pressure buildup in the engine crankcase and forcing oil up - or even something like a blocked oil drain passage in the rear head could be forcing oil up into that hose. Just speculation, but that hose would not be saturated in normal running operations, so something is not right.

Gordon

 

When was the last time the PCV system was serviced? As the previous post outlined, they cannot just be ignored.

 

I dont understand why oil would be on the outside of the hose, it is not coming through the hose unless old and cracked, and you rrplaced that, so the oil source must be somewhere else. I there a cam cover leak with oil wicking up the hose fabric?

 

+1 -- or the nipple has some sort of damage/nicking/roughness on the outside, and isn't sealing well to the inside of the hose. In any case, not a huge issue...

 

Those pretty older style cad plated hose clamps are unobtanium, so don't lose or get rid of those!

That said, they do not seal as well as the Norma style clamps used in the later years of 328/Mondial 3.2 series. Perhaps tighten those clamps, or try the Norma clamps. Those hoses are very thick and hard, tighten them with the engine hot, you will be surprised how much tighter you can go when the hoses are heat pliable.

It is possible that aluminum pipe has fractured, it is a hard but somewhat brittle aluminum. Check the pipe for integrity, hairline cracks and such.

The suggestion to dismantle and clean the blowby system is not a bad idea. That said, the key blow by part is a weird shaped hollow metal canister item with a simple baffle in it. You would solvent rince it out, and replace the various hoses. I am sure cleaning out after many years is a good practice, but it is hard to imagine this system getting blocked or plugged up.

 

Is the problem further up the aluminium pipe and is dribbling down to that hose? Shop paper wrapped round the pipe securely might give indications

 

The pipe is anything but hard and brittle. It is soft and malleable. They bend very easily. The vapor separator gets a great deal of water moisture and being clogged with rust and or sludge is very common. The return hoses clog commonly as well.