2006-11-06 06:28:58 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
EPA, Do it anyway, It won't hurt the bike.
2006-11-06 06:30:19 · answer #1 · answered by Paul S 4 · 0⤊ 0⤋
Allow me to add a couple of technical and historical tidbits. Engine crankcases must be vented to purge them of hydrocarbons, water and oil vapor and to keep the crankcase from pressurizing. This combination of pollutants is unhealthy. Up until 1960, when the positive crankcase ventilation valve (PCV) was mandated by California, auto engines had a road vent tube which ran off the back of the engine down to the bottom of the vehicle. The air passing over the end of this tube gave it a slight suction, helping to vent the engine.
2006-11-06 07:33:40 · answer #2 · answered by db79300 4 · 0⤊ 0⤋
When an internal combustion engine is running, it builds up heat in the crankcases causing the engine cooling oil to give off vapour.
This vapour is a hydro-carbon and a pollutant.
Legislation on construction and use of vehicles is being used to reduce pollution. Most engines now recycle these fumes into the air intake system and consequently burn them in the combustion chamber of the engine.
If you are into racing Classic Motorcycles you can often see the crankcase breather tube venting into a plastic bottle or similar as these machines' engines are not designed to re-breath these fumes. Mind you they do sound good
2006-11-06 06:42:55 · answer #3 · answered by sananabetahi 2 · 1⤊ 0⤋
The reason the crankcase should not be vented to the atmosphere is that basicly for emissions. The crankcase blow-by has hydrocarbons and should not be vented to atmosphere. You car has a lot of emission control systems that prevent hydrocarbons, carbon monoxide, and oxides of nitrogen. It would not be good if you just vent the blow-by to the atmosphere. So your crankcase is always routed by to the intake so the engine can burn the blow-by.
Another reason is oil. If you vented to atmosphere, you would have oil shooting everywhere especially if you have a older car that has excessive blow-by. It would be one hell of a mess.
2006-11-06 06:38:53 · answer #4 · answered by Tommy T 1 · 1⤊ 0⤋
Oil vapour is a hydrocarbon and isn't very good for the enviroment, or the passengers in the car. It gets burnt in the engine to reduce (but not totally eliminate) the hydrocarbons that same way fuel tanks have there vapours burnt off.
2006-11-08 06:01:37 · answer #5 · answered by Bandit600 5 · 0⤊ 0⤋
Simple pollution , it will emit all the smoke and burning in the engine out to the atmosphere instead of being recycled through the catalytic converter it will also fail an MOT
2006-11-07 04:47:04 · answer #6 · answered by ? 7 · 0⤊ 0⤋
when the engine is hot there is a lot of oil mist goes through the breather if it was not diverted back into the engine it would go all over the underside of the car and in this case a little goes a long way
2006-11-06 06:37:07 · answer #7 · answered by carol p 4 · 0⤊ 0⤋
They used to be when I was young! You got dirty oil on the driveway and parking places and a foul smell of blow by in the car so that was the initial reason for feeding it to the air intake. Naturally the PC brigade have taken credit for it now!
RoyS
2006-11-06 18:19:56 · answer #8 · answered by Roy S 5 · 0⤊ 0⤋