when replace PCV ?
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From: Orlando, Fl
when replace PCV ?
I can't find my maintenance guide booklet.What is the normal time to replace my pcv valve ?
I'm at 92,000+ miles on my 06 ranger ,3.0.Everything runs fine,but I try to stay a one step ahead on maintenance.
Any suggestions ??
Thanks
old retired guy
I'm at 92,000+ miles on my 06 ranger ,3.0.Everything runs fine,but I try to stay a one step ahead on maintenance.
Any suggestions ??
Thanks
old retired guy
Every 3 to 4 oil changes should be good
PCV(positive crankcase ventilation) system creates a slight negative pressure in the crankcase/valve cover areas to pull out Blow-By oil vapor and burn it in the engine so it doesn't pollute the planet.
Every time a cylinder fires some of the very hot combustion gases will "blow-by" the piston/rings, very normal, metal on metal seals are not air tight, lol.
As this very hot blow-by passes the rings it will vaporize some of the oil coating rings and cylinder walls.
This is where the oil vapor in the engine comes from, oil pressure is not high enough to vaporize oil, so it doesn't come from bearings or valve train, PCV system pulls in blow-by gases and oil vapor.
Blow-by also creates a positive pressure in the crankcase and valve cover areas.
Prior to PCV systems the lower block or upper oil pan had a hole with a tube in it, pointed down at the ground, this allowed Blow-by vapor and pressure to escape the engine and oil dripped out this tube anytime engine was running.
PCV ended that.
As an engine gets older the rings get worn and blow-by increases, also normal, and PCV valve may need to be changed more often.
Some install an "oil catch can" on the PCV system when engine gets older, this allows most of the oil vapor to condense in a can before blow-by is sent to the intake manifold to be burned.
Then they empty the can as needed.
So bottom line is to have a look at the PCV valve, it will have oil vapor coating inside, up to you to determine when to change it.
Also, PCV system uses two hoses, one for the PCV valve and one for the Vent, Vent hose will be on a valve cover, sometimes on oil filler tube sometimes just on a valve cover fitting and it will run to "clean air" location, so an air source AFTER the air filter, could be on air filter housing or on the large air tube from air filter housing to the upper intake.
BOTH HOSES should be inspected and cleaned as needed, they will also have oil vapor residue build up.
PCV(positive crankcase ventilation) system creates a slight negative pressure in the crankcase/valve cover areas to pull out Blow-By oil vapor and burn it in the engine so it doesn't pollute the planet.
Every time a cylinder fires some of the very hot combustion gases will "blow-by" the piston/rings, very normal, metal on metal seals are not air tight, lol.
As this very hot blow-by passes the rings it will vaporize some of the oil coating rings and cylinder walls.
This is where the oil vapor in the engine comes from, oil pressure is not high enough to vaporize oil, so it doesn't come from bearings or valve train, PCV system pulls in blow-by gases and oil vapor.
Blow-by also creates a positive pressure in the crankcase and valve cover areas.
Prior to PCV systems the lower block or upper oil pan had a hole with a tube in it, pointed down at the ground, this allowed Blow-by vapor and pressure to escape the engine and oil dripped out this tube anytime engine was running.
PCV ended that.
As an engine gets older the rings get worn and blow-by increases, also normal, and PCV valve may need to be changed more often.
Some install an "oil catch can" on the PCV system when engine gets older, this allows most of the oil vapor to condense in a can before blow-by is sent to the intake manifold to be burned.
Then they empty the can as needed.
So bottom line is to have a look at the PCV valve, it will have oil vapor coating inside, up to you to determine when to change it.
Also, PCV system uses two hoses, one for the PCV valve and one for the Vent, Vent hose will be on a valve cover, sometimes on oil filler tube sometimes just on a valve cover fitting and it will run to "clean air" location, so an air source AFTER the air filter, could be on air filter housing or on the large air tube from air filter housing to the upper intake.
BOTH HOSES should be inspected and cleaned as needed, they will also have oil vapor residue build up.
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