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Thread: Pcv rubber boot

  1. #11
    LTX Member


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    Nov 2012
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    2000 camaro v6 96 camaro ss
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    Mine is a 96 reason I am concerned.
    Quote Originally Posted by Injuneer View Post
    Not sure how pressure in the intake manifold can "blow the PCV out".

    Just to clarify - the end of the PCV valve, that pushes into the grommet on the side of the manifold is not exposed to the plenum. There is an internal passage that runs down the inside of rhe manifold, to a small slot that is exposed to the lifter valley/crankcase.

    The outflow from the crankcase passes out of the PCV on the external end, pulled by vacuum from the intake manifold plenum. In 93/94 the vacuum line is the C-shaped hose connected to a nipple on the manifold. On 95-97 the vacuum hose connects to a port under the throttle body.

    If the intake is pressurized, the pressure would force closed the check valve pellet in the PCV. Worst that could happen is the pressure would blow the vacuum line off the manifold or off the valve. With forced induction it would make sense to change to the catch can/PVC as Brian described.

    If you have significant pressure in the crankcase, it will vent through the breather.
    1996 ss camaro: .040 over forged srp dished pistons forged h beam eagle rods 68 mm turbo ported heads and intake ltcc ignition.

  2. #12
    LTx Guru


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    Quote Originally Posted by supr67 View Post
    Mine is a 96 reason I am concerned.
    Doesn't matter what year. If the manifold is pressured, the pressure travels through the vacuum line, to the OUTSIDE end of the PCV. It would be forcing the PCV into the grommet. The end of the PCV inside the manifold is NOT exposed to manifold pressure. It is only exposed to the lifter valley and crankcase.

    94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams solid roller / TH400+GearVendors OD / 4.11's/Strange 12-bolt / 300-shot (dry) N2O / Spohn Suspension / 6-pt roll bar /AutoMeter instrumentation / MoTeC M48 Pro engine management system /a few other odds 'n ends.

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