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Old 03-31-2017, 05:52 PM
JAMIEPACURN JAMIEPACURN is offline
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Join Date: Apr 2012
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Default Positive ventilation crankcase issue

Hey guys, after I got my motor rebuilt I got a question about the PVC valve that I got from RJC racing. Before going into the question here is what is in my motor:

Stock 109 block bored 0.30
GN1 stroker 4340 steel crank, 6350 rods
FTS RACE PISTONS
REVOLUTION X ROLLER CAM 210/214
DOUBLE ROLLER TIMING CHAIN
CHAMPION INTAKE MANIFOLD WITH STREET PORT
CHAMPION GN1 ALUMINUM HEADS
70 MM THROTTLE BODY
TA PERFORMANCE HEADERS
TURBO PT 6466 GENERATION 2 BILLET
Chip- TurboTWeek street chip 93-94 octane

I was told by the engine builder to leave the PVC valve uncapped, but when I did this oil leaked all over the place as it was coming out of the push in style type of breathers. I then replaced the push style breathers with Metco's angled style breathers hoping this will alleviate the issue. I haven't gotten my Buick out for Spring yet. Has anyone else left their PVC valve just uncapped and open to air????? Will this still cause "blow by" oil issues by doing this????

Local mechanics at a local shop said I should connect the PVC back up with silicone hose to the vacuum block. So when I did this, the turbo generated so much boost that it literally exploded the silicone hose off the PVC valve. I currently still have the vacuum line still attached to the PVC valve but not sure if this is correct or not. I'm thinking about plugging the line with a cap at the vacuum block and leave the PVC uncapped again but wanted feedback before doing so.


Jamie C.
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