C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

pcv question

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Old Jun 12, 2005 | 03:31 PM
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i took my air filter out to clean it (k&n) and while i was there i took the intake boots off and the maf ? off to check my throttle body for dirt and noticed it was coated with oil, all around the throttle blades and inside the intake rubber boots. so i pulled the pass side cover off to check the pcv and it just has a plastic 90 going to a plastic hose that goes to the throttle body. it was full of oil...... what stops oil from getting sucked into the throttle body? is the 90 degree fitting in the pass valve cover supposed to be a pcv with a checkvalve? mine is just a open hollow 90 degree fitting.
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Old Jun 12, 2005 | 04:13 PM
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There should be oil baffles in the valve covers. Are yours aftermarket by chance? And no, there is no PCV valve on the passenger side, only the driver side. The passenger side is a breather that goes to the throttle body.
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Old Jun 12, 2005 | 04:16 PM
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I have a 92 LT-1 my pcv valve is on drivers side,not in the valve cover ,valve is in ithe side of the intake manifold
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Old Jun 12, 2005 | 04:38 PM
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Originally Posted by GS977
i took my air filter out to clean it (k&n) and while i was there i took the intake boots off and the maf ? off to check my throttle body for dirt and noticed it was coated with oil, all around the throttle blades and inside the intake rubber boots. so i pulled the pass side cover off to check the pcv and it just has a plastic 90 going to a plastic hose that goes to the throttle body. it was full of oil...... what stops oil from getting sucked into the throttle body? is the 90 degree fitting in the pass valve cover supposed to be a pcv with a checkvalve? mine is just a open hollow 90 degree fitting.
Normal.

The PCV valve on our '96s is on the driver's side of the intake manifold.
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Old Jun 12, 2005 | 04:52 PM
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The hose on the passanger side is the fresh air supply for the pcv system. Some oil in there is normal, but excessive oil could indicate excessive blow-by. Do check the pcv on the drivers side of the manifold to be sure it isn't cloged, which it probably isn't. Good luck!
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Old Jun 12, 2005 | 05:04 PM
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thanks everyone. i just bought a new pcv valve. there shouldnt be any blowby, the motor only has @ 8,000 miles on it. its a crate engine from sdpc. ill have to pull the valve cover to check the baffle. its has stock valve covers.
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Old Jun 12, 2005 | 05:26 PM
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i just changed the pcv valve.... it looks like it had the original one in there. it said rochester and something else on it . looked old and oilly.
all good now though
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