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Car Forum / Mercedes-Benz Cars / January 2007

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'79 300TD / W123 oil leak

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Tom Plunket - 30 Jan 2007 18:54 GMT
There's oil leaking around the 'vent' in the top of the valve cover that
has a hose leading to the air cleaner.  Is there any way that I can stop
that from happening?  My mechanic indicates only that, "oh, lots of
these cars do that," but I'd really like to stop it as part of my quest
to stop whatever leak is stinking up the passenger compartment while I'm
driving around...

-tom!

--
Guenter Scholz - 30 Jan 2007 20:33 GMT
>There's oil leaking around the 'vent' in the top of the valve cover that
>has a hose leading to the air cleaner.  Is there any way that I can stop
>that from happening?  My mechanic indicates only that, "oh, lots of
>these cars do that," but I'd really like to stop it as part of my quest
>to stop whatever leak is stinking up the passenger compartment while I'm
>driving around...

    Tom, the oil is 'blow-by' from piston rings that aren't sealing
perfectly anymore.... the only way to fix this oil problem is therefore
to fix the blow-by.

cheers, guenter
Tom Plunket - 30 Jan 2007 21:21 GMT
> >There's oil leaking around the 'vent' in the top of the valve cover that
> >has a hose leading to the air cleaner.  Is there any way that I can stop
[quoted text clipped - 6 lines]
> perfectly anymore.... the only way to fix this oil problem is therefore
> to fix the blow-by.

I'm not too worried about oil being there in the system, more about it
leaking down the valve cover and onto the exhaust.  If I pull the hose,
is there a sealer I can put on there that'll be ok to use?
Unfortunately, my former reference for these sorts of questions passed
away a few years ago, I didn't pay attention well enough when I was
younger to what is used to seal where, so these days I usually slide
hoses on and clamp 'em down and hope they don't leak.  ;)

Pulling the engine to put new rings in sounds like a fun job, but one I
am at present entirely ill-equipped to do.  :(

thx,
-tom!

--
Guenter Scholz - 30 Jan 2007 23:40 GMT
Tom, there are hose clamps on my hose at either end.  Just the simple kind
that open (losen) by squeezing with pliers.

cheers, guenter

>> >There's oil leaking around the 'vent' in the top of the valve cover that
>> >has a hose leading to the air cleaner.  Is there any way that I can stop
[quoted text clipped - 22 lines]
>
>--
Tiger - 30 Jan 2007 20:41 GMT
Get a new hose!

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