On my '92, 3.9 the hose from the stock air cleaner goes into a breather
air cleaner on the valve cover to ventilate the engine. The oil vapors
from the PCV valve are pulled into the intake manifold. There shouldn't
be a lot of oil vapor coming back out of the hose that comes out of the
air cleaner can, but a filter of some kind would probably keep the engine
compartment cleaner.
Larry Elliott, '92, 3.9, 4x4, 5 sp'd, LE
On Thu, 11 Jul 1996, KEN MANSFIELD wrote:
> Glenn,
>
> On the K&N FIPK, the crankcase breather hose is attached to an
> inlet on the underside of the bottom filter cover and secured by a
> radiator hose-type clamp (my hose fitted tightly w/o using the
> clamp). The downside is, where the OEM housing filtered the
> crankcase fumes through the air filter, the K&N unit does not. On
> either unit, the crankcase fumes are burned. In your application,
> the fumes are vented.
>
> So, I'll change the crankcase filter more often. I don't think much
> particulate matter is coming out anyway.
>
> BTW, K&N does not have an EPA-legal open crankcase breather
> filter for the Dakota.
>
> Your state may not require exhaust analysis but I'll bet they
> mandate that only emissions-legal equipment is installed. In
> other words, don't throw away that original filter housing...
>
> klm
>
> >>> "Glenn S. Wiltse" <iggy@merit.edu> 07/11/96 11:32am >>>
>
> So what do they do with the crankcase breather hose? If the
> filter
> housing is all open, isn't the hose just wide open too? Do they put
> it between the filter and the intake?
>
> I just put a peice of cloth over the end of the hose, and tied it
> on with a tie wrap. On the stock setup it's just connected to the
> filter
> housing before the filter, so I figure I'm filtering it more now then
> it was before.
>
> We don't have any emmisions inspections around here.
>
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