740 turbodiesel gasket between turbo and airfilter tube?

When I was looking under the hood of my 1989 turbodiesel van I saw that oil
was leaking from the ventilation on top of the engine in the lid above the
valves. The rubber tube from there goes into a metal manifold(?) which is
attached to the turboloader on one end and to a plastic tube from the air
filter on the other end, that means all air taken in goes through it. I was
surprised to find out that this manifold is not sitting tight on the
turboloader but is a bit loose. There is a kind of spring mechanism keeping
it in place though. That means that dirty air can enter the engine and the
turboloader after the filter. In my Haynes manual I could not find any info
on which kind of gasket is there. Does anybody know? Any pitfalls?


Viktor Weisshäupl, Vienna, Austria

 

What's a turboloader? I'm having trouble picturing what part you're
referring to, I've only ever seen one intact 700 TD engine but I don't
recall there being anything unusual about it.

 

I mean the air compressor driven by exhaust gases blowing air in the engine.
Sorry for my not so perfect technical English. The turbo compressor aspirates
air from the air filter box. The aspiration metal tube is connected to another
metal tube which brings air from the air filter box.

I was in a Volvo shop this afternoon and saw in the spare part program that
there is a rubber seal. I will change it, since the parts seem to be too loose,
so probably the rubber seal is broken.

Viktor

 

Ah, turbocharger is the word you're looking for, or just turbo.

If you take it apart it should become apparent what the problem is, you're
probably right that the rubber seal has either fallen apart or just moved
out of place.

 

Today I did it. There was no more trace of a rubber seal on the
turbocharger´s metal tube.. The 15 $ Volvo seal looked just like any
ordinary rubber ring.....
Thanx for your input
Viktor