Maintenance free Crankcase filter

[Marajin]

(11-12-2016 )sick puppy Wrote:  im new and wondering well wouldnt there be an oil leak if you drill holes { in the crank case filter itself }?

The area where the oil is on your engine (just below the pistons) builds pressure because of blow-by. It HAS to go somewhere, otherwise pressure will build in the oil pan and turn your engine into an explosive bomb of fumes just waiting to go off. Relieving this pressure prevents this, and also lets the pistons go up and down easier, allowing the entire engine to breathe.

It used to be called the "Road Draft Tube"...




These days everyone calls it a Crank Case breather tube... and YES, someone decided to stick a filter on it so that you would have to pay every other oil change to have it replaced to the tune of $80+. -- Pure profit!.

You can see that it is simply a tube that lets the engine breathe so no fumes build up inside it. The fumes that come out are explosive because it is oil and unburnt fuel fumes that got past piston rings. if your engine is in good shape,.. little or no fumes come out of this tube at all. if your engine is worn down though,.. and you got carbon-packed rings, etc... (bad turbo or compressor can do it too), then it will always be pushing air/fumes out of it. If it has a p[ressure sensor,.. you will always be getting alarms too, and have to change the filter more often than recommended. That or or drill it the filter out and let the engine breathe because your sick of wasting money on a filter that "filter only the outside air" and has no effect on helping your engine, except to clog up and cost you money.

http://rawze.com/forums/showthread.php?t...376#pid376


Some smaller vehicles that do not have turbochargers have this tube going back into the intake to improve fuel mileage,.. but diesel engines have PRESSURE (via the turbo) into the intake instead of a vacum like a car. There is also the possibility of those fumes keeping the engine running after you shut it off,.. so most older diesels just had the tube going down under the engine to nothing at all (the outside air).




Then someone decided to "Filter" these fumes because they didn't want to pollute the environment. God forbid someone might smell a slight hint of oil when walking past your truck, or worse yet,.. some politician that works for the EPA might accidentally sniff it and get offended.


These days, crankcase filters are there mostly to satisfy a European Mandates (emissions regulations). It is also a way for the engine maker/filter companies to rape you for $80 every other oil change for something that should cost $3 bucks.


http://rawze.com/forums/showthread.php?tid=65


Ever walk through a truck stop parking lot and see an older Peterbilt or KW truck with that hose sticking out of the bottom, some light smoke coming out of the tube near the drivers front steer tire? -- That is what it filters on the newer engines.

======

To answer your question -- NO There will NOT be an oil leak if you drill it out,.. and NO it does not hurt a thing because the filter only filters fumes going OUT of your engine (to the outside air), not in.

The maintenence free crank case filter ( post #1 ) simply has a hole in it.

Tags:

crank case fumes, crankcase fumes, crankcase filter, crankcase filter hole, hole in crank case filter