Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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PCV, breather, evac...

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Old Mar 15, 2007 | 04:12 PM
  #1  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
PCV, breather, evac...

i know they are needed to rid the motor of built up pressure, what other ways are there to accomplish the same feat that is cleaner looking? my new motor will need a setup and im trying to make the motor as clean as possible.

on a side note, can you do away with the breather and just run 2 pcv valves or do i have no idea what im talking about

thanks!!
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Old Mar 15, 2007 | 04:36 PM
  #2  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
The breather allows fresh air to enter the crankcase to flush out the blowby gasses. That won't happen with two PCV valves.
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Old Mar 15, 2007 | 05:44 PM
  #3  
Randy82WS7's Avatar
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
you have to have one vacuum source, the pvc and one return

what the engine sucks out of the crankcase must be replacedit is not to keep presure from building up in the crnakcase but rather to suck out gases and moisture in which if allowed to collect in the crankcase will contaminate oil and turn to acid due to water moisture content buildup

you need one pvc and one return

good luck
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Old Mar 15, 2007 | 06:02 PM
  #4  
//<86TA>\\'s Avatar
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Supreme Member
15 Year Member
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Joined: Aug 2006
Posts: 12,812
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
thats what i figured, thanks!
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