PCV valve/crankcase issue
07-01-2009, 08:56 AM
#1
Thread Starter
Join Date: Jun 2009
Location: PA
Posts: 10
PCV valve/crankcase issue
Hey guys,
Still learning about engines. What is the difference between an open and closed crankcase? I know an open uses a PCV valve. But, are there advantages to running open vs. closed? How can you tell if your engine is supposed to be one or the other? Can you run an open crankcase closed? If so, what are the pros and cons of switching systems? Are engines unique, meaning some are built to have an open system, some are built to be closed? If so, how can you tell the difference? What is affected by the open/closed system? I have a PCV hooked up to my carb but if I plug everything, it seems to run alright either way. What's the deal with this stuff? Thanks in advance.
Still learning about engines. What is the difference between an open and closed crankcase? I know an open uses a PCV valve. But, are there advantages to running open vs. closed? How can you tell if your engine is supposed to be one or the other? Can you run an open crankcase closed? If so, what are the pros and cons of switching systems? Are engines unique, meaning some are built to have an open system, some are built to be closed? If so, how can you tell the difference? What is affected by the open/closed system? I have a PCV hooked up to my carb but if I plug everything, it seems to run alright either way. What's the deal with this stuff? Thanks in advance.
07-01-2009, 09:30 AM
#2
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
Open PCV system = PCV + open breather
Closed PCV system = PCV + breather hose attached to carburetor filter, throttle body, TB air duct.
Closed PCV systems are required in MAF systems to ensure an unmetered air (vacuum leak) condition is not present..... carburetor setup = either can be used.
Closed system
Closed PCV system = PCV + breather hose attached to carburetor filter, throttle body, TB air duct.
Closed PCV systems are required in MAF systems to ensure an unmetered air (vacuum leak) condition is not present..... carburetor setup = either can be used.
Closed system
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