็Qustion? about hose to caburator
Thread Starter
Registered User
Joined: Aug 2012
Posts: 33
From: Bangkkok,Thailand
Registered User
Joined: Jan 2009
Posts: 4,086
From: Too close to Toronto!!
Fresh air is drawn in at right valve cover because of vacuum at left valve cover, and crankcase vapours go out from left valve cover via PCV valve and hose to carb, because of carb vacuum. PCV valve is a check valve in case of back fire.
Registered User
Joined: Dec 2007
Posts: 1,124
From: Fort Pierce, FL
Although a "pollution thing", that doesn't mean you should eliminate it. It's a closed system that relieves the pressures in the crankcase and keeps those fumes in the engine to be burned, rather than letting them into the air. Don't ever eliminate it, or the unrelieved pressure will push oil all kinds of places you don't want it. You could convert back to the older style open system, but what's the point? The PVC does not rob horsepower or cause drivability issues (unless it is plugged up).
Old(s) Fart
Joined: Mar 2007
Posts: 50,768
From: Northern VA
Yes, you want to run a PCV valve. It makes no difference if the valve is in the RH or LH valve cover - some Olds motors even connect the PCV valve in the valley between intake runners. I've also seen other motors that have the valve in the oil fill tube (not Olds factory issue). All that matters is that the PCV valve is connected to the crankcase volume somehow.
Registered User
Joined: Jan 2013
Posts: 4
Sawadee Kup -
There is still more than adequate oil vapor in the valve train area as well as normal oil splash to lubricate the valve stems.
The positive crankase ventilization valve is just part of a long ago implemented process of controlling the vapors from going straight to the atmosphere here in the USA.
In case you ask - Long ago way north out of Udorn Thani and NKP too.
Sawadee Kup -
Cob Ku Ma
IOG
There is still more than adequate oil vapor in the valve train area as well as normal oil splash to lubricate the valve stems.
The positive crankase ventilization valve is just part of a long ago implemented process of controlling the vapors from going straight to the atmosphere here in the USA.In case you ask - Long ago way north out of Udorn Thani and NKP too.
Sawadee Kup -
Cob Ku Ma
IOG
Thread Starter
Registered User
Joined: Aug 2012
Posts: 33
From: Bangkkok,Thailand
Sawadee Kup -
There is still more than adequate oil vapor in the valve train area as well as normal oil splash to lubricate the valve stems. The positive crankase ventilization valve is just part of a long ago implemented process of controlling the vapors from going straight to the atmosphere here in the USA.
In case you ask - Long ago way north out of Udorn Thani and NKP too.
Sawadee Kup -
Cob Ku Ma
IOG
There is still more than adequate oil vapor in the valve train area as well as normal oil splash to lubricate the valve stems.
The positive crankase ventilization valve is just part of a long ago implemented process of controlling the vapors from going straight to the atmosphere here in the USA.In case you ask - Long ago way north out of Udorn Thani and NKP too.
Sawadee Kup -
Cob Ku Ma
IOG
both side of valve cover not connect anything.
Registered User
Joined: Dec 2012
Posts: 41
From: South Florida
Although a "pollution thing", that doesn't mean you should eliminate it. It's a closed system that relieves the pressures in the crankcase and keeps those fumes in the engine to be burned, rather than letting them into the air. Don't ever eliminate it, or the unrelieved pressure will push oil all kinds of places you don't want it. You could convert back to the older style open system, but what's the point? The PVC does not rob horsepower or cause drivability issues (unless it is plugged up).
Good post, had this happen first-hand.
Thread
Thread Starter
Forum
Replies
Last Post
