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Crankcase ventilation system is used to consume crankcase vapors created during the combustion process instead of venting them to the atmosphere.
Fresh air is supplied through a filter to the crankcase, the crankcase mixes the fresh air with the blow-by gases and then passed through a positive crankcase ventilation (PCV) orificed tube into the intake manifold.
The PCV orificed tube restricts the flow rate of the blow-by gases using a 3 mm (0.118 in) (a) orifice located at the end of the tube. If abnormal operating conditions arise, the system is designed to allow excessive amounts of blow-by gases to back flow through the crankcase vent tube into the throttle body in order to be consumed by normal combustion.
Positive Crankcase Ventilation Hose/Pipe/Tube Replacement
Remove the two nuts (2) from the fuel injector sight shield (1).
Lift the sight shield (1) from the front and pull forward to disengage the rear tab from the bracket.
Disconnect the PCV fresh air tube from the left camshaft cover.
Remove the PCV fresh air tube from the throttle body.
Remove the drive belt. Refer to Drive Belt Replacement .
Remove the power steering pump retaining bolt.
With the hoses still attached, Carefully position aside the power steering pump.
Remove the retaining clip securing the PCV dirty air tube.
Disconnect the PCV dirty air tube from the PCV orificed tube.
Remove the PCV dirty air tube from the intake manifold.
First I must ask if you have checked you oil level to make sure you don't have a leak putting antifreeze in your crankcase. And a severely overfull crankcase will cause a turbulence that that can displace the liquid. Also make sure your PCV valve is working. It also sounds like you may have a 'blow by' issue.
Check the cable to the temp sender unit is attached if so check the unit is working with a ohms meter. check the throttle cable is not binding ,the throttle leaver stop at the throttle body housing should be fully closed .
You will have to get the bracket out of the way, just to get the housing off and back on in an easy manner that won't cause a leak.
The hose may be the one from the valve cover area, carrying the blow by and crankcase fumes back into the intake-so part of the positive crankcase ventilation. So that hose could have a lot of carbon like deposits. See if you can twist or work it back and forth carefully. Not sure how it connects or where it comes apart, If it is plastic, sometimes they break no matter how careful- age makes them very brittle.
All air conditioning units remove moister from the air.Which is good,it helps the moister on your skin evaporate faster,and helps cool you down.If its a central heat/cooling unit it should have some form of drain pipe to carry this moister away from the unit.Usually a white pvc tubing. Sometimes these become clogged with dirt,or even believe it not algae.If there is no drain someone didn't do the job right.(clean the gunk out of the pipe,or replace the tubing). If your talking about a window unit the unit will drain out the back of the unit,but the air conditioner has to be tilted in such a way that any water inside the unit will flow toward the back of the unit. (simply lower the outside end of the unit a little lower than the side stuck in the window).I see you mentioned a vent so you are probably talking about a air handling unit in your home.The vent should just be for fresh air.If you have a very tight house an air handling unit will be designed to bring fresh air into the house(to keep your air fresh).That is usually its only function.There should also be a small drain pipe leaving the unit somewhere.Some modern units even have a back up drain if the first clogs,and maybe even a signal that tells you the first pipe is clogged.
Well this this will be you valve cover gaskets leaking. Try to feel around or look to see if there is fresh oil around the valve cover. Oil being sucked in to the air filter is a sure sign of a leak in your engine compartment. Check your oil levels also. Hope this helped.