Mini-Breather filters on valve covers...
12-04-2003, 01:56 AM
#1
Moderator
Thread Starter
Mini-Breather filters on valve covers...
Theres a reason why these arent so good for your engine, something to do with the Positive Crankcase Ventilation system, but I dont remember the specifics. Can someone remind me?
Also, would a clogged carbon canister (the big aparatus under the fuel filter) contribute to oil consumption?
Also, would a clogged carbon canister (the big aparatus under the fuel filter) contribute to oil consumption?
__________________
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
12-04-2003, 11:19 AM
#2
Registered User
Join Date: Oct 2003
Location: Utah
Posts: 167
Likes: 0
Received 0 Likes
on
0 Posts
Are breather filters really bad?
Yes they are. Read further for why.
The honda crankcase breather is a POSITIVE pressure ventilation system.The air from the intake blows into the valve cover. It is NOT a negative pressure ventilation system...it does NOT suck air from the valvecover to the intake.
Breathers remove the source of positive ventilation that repressurizes the POSTIVE CRANKCASE VENTILATION (PCV) valve.
There is less pressure in the crank when you add a breather at the valve cover. The consequence of this is you get more positive blow-by from the combustion chamber past the piston rings and into the crankcase. More blow-by means less cylinder pressure...less cylinder pressure means the burn is slower and less complete...the result is more emissions and less power.
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
Disconnecting the breather tube, which blows fresh intake air into the valve cover, and placing a breather on the valve cover just creates more blow-by and emissions. Eventually you have so much blow-by, you lose power.
Thanks to Team-Integra.net for this info :-)
Hope that helps you but i had to delete part of the article cause the pictures arent working
Yes they are. Read further for why.
The honda crankcase breather is a POSITIVE pressure ventilation system.The air from the intake blows into the valve cover. It is NOT a negative pressure ventilation system...it does NOT suck air from the valvecover to the intake.
Breathers remove the source of positive ventilation that repressurizes the POSTIVE CRANKCASE VENTILATION (PCV) valve.
There is less pressure in the crank when you add a breather at the valve cover. The consequence of this is you get more positive blow-by from the combustion chamber past the piston rings and into the crankcase. More blow-by means less cylinder pressure...less cylinder pressure means the burn is slower and less complete...the result is more emissions and less power.
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
Disconnecting the breather tube, which blows fresh intake air into the valve cover, and placing a breather on the valve cover just creates more blow-by and emissions. Eventually you have so much blow-by, you lose power.
Thanks to Team-Integra.net for this info :-)
Hope that helps you but i had to delete part of the article cause the pictures arent working
12-04-2003, 12:25 PM
#3
Moderator
Thread Starter
Originally posted by TyPe_R_GuY
Are breather filters really bad?
Yes they are. Read further for why.
The honda crankcase breather is a POSITIVE pressure ventilation system.The air from the intake blows into the valve cover. It is NOT a negative pressure ventilation system...it does NOT suck air from the valvecover to the intake.
Breathers remove the source of positive ventilation that repressurizes the POSTIVE CRANKCASE VENTILATION (PCV) valve.
There is less pressure in the crank when you add a breather at the valve cover. The consequence of this is you get more positive blow-by from the combustion chamber past the piston rings and into the crankcase. More blow-by means less cylinder pressure...less cylinder pressure means the burn is slower and less complete...the result is more emissions and less power.
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
Disconnecting the breather tube, which blows fresh intake air into the valve cover, and placing a breather on the valve cover just creates more blow-by and emissions. Eventually you have so much blow-by, you lose power.
Thanks to Team-Integra.net for this info :-)
Hope that helps you but i had to delete part of the article cause the pictures arent working
Are breather filters really bad?
Yes they are. Read further for why.
The honda crankcase breather is a POSITIVE pressure ventilation system.The air from the intake blows into the valve cover. It is NOT a negative pressure ventilation system...it does NOT suck air from the valvecover to the intake.
Breathers remove the source of positive ventilation that repressurizes the POSTIVE CRANKCASE VENTILATION (PCV) valve.
There is less pressure in the crank when you add a breather at the valve cover. The consequence of this is you get more positive blow-by from the combustion chamber past the piston rings and into the crankcase. More blow-by means less cylinder pressure...less cylinder pressure means the burn is slower and less complete...the result is more emissions and less power.
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
Disconnecting the breather tube, which blows fresh intake air into the valve cover, and placing a breather on the valve cover just creates more blow-by and emissions. Eventually you have so much blow-by, you lose power.
Thanks to Team-Integra.net for this info :-)
Hope that helps you but i had to delete part of the article cause the pictures arent working
__________________
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
12-04-2003, 01:38 PM
#5
Moderator
Join Date: Jun 2001
Posts: 11,776
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by TyPe_R_GuY
Blah blah blah
Blah blah blah
Originally posted by TyPe_R_GuY
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve.
Catch can goes here:
12-04-2003, 04:39 PM
#6
Moderator
Thread Starter
Originally posted by DB7 2.0
youre welcome :fawk:
youre welcome :fawk:
__________________
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
DB Squad
Integra Forum Moderator
2016 BMW 340i M-Sport / 2013 Chevrolet Volt / 1999 Subaru Impreza RS EJ205
12-04-2003, 05:18 PM
#9
Apathy Kills
:chuckles: Nice diagram of the right way though. :goodjob: lol
__________________
:: :ToDspin: - supermod - but who gives a shit?
:: HAN Integra FAQ: If, by some miracle, yours hasn't been stolen... check it out!
:: HAN Integra FAQ: If, by some miracle, yours hasn't been stolen... check it out!
