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EA81 Weber swap now some blowby questions
Posted 11 October 2012 - 05:42 PM
Posted 11 October 2012 - 06:07 PM
the above picture shows the proper way to vent the crankcase gases from the engine and into the PCV.
The brass looking item on his engine, is a reducer that vents gases this will work but is not an ideal solution for the PCV gases. this is because the gases also play a role in removing oil from the rocker covers back into the sump.
Edited by TOONGA, 11 October 2012 - 06:19 PM.
corrected my early morning ramblings
Posted 12 October 2012 - 08:25 AM
Posted 13 October 2012 - 12:33 PM
Posted 13 October 2012 - 05:31 PM
for the EGR system - you can by pass it completely if you wish, its non essential, but also removal is non beneficial. It allows some exhaust gases to enter the manifold at certain loads. its the round canister on the back of your intake manifold (I believe, since its there on an EA82). it has a small vacuum line hooked to manifold vacuum to run the diaphram, and a large hose going to the hourglass (anti-afterfire vavle). the actual EGR system is internal to the heads and manifold, the anti afterfire valve is just a noice reducer, remove it and plug the line (dont forget to plug the other hoses from the anti afterfire valve as well). If you unhook the small vacuum line the EGR will shut down and not function, which is ok as well if your just testing it out.
the PCV system vents gases from the crank case. the routing is fresh air into the top of the passenger side head (from the air cleaner, or just a breather cap you can get at any parts store). then the drivers side head has a hose that goes to the actual valve which is in the center back of the manifold. inline on the hose that works the valve needs to have a T fitting that has the 2 large holes for the hoses, and 1 reduced size hole to allow a bit of fresh air into the system if it needs it. the T doesnt hook to any other hoses, just puts a small hole in the line to keep the suction down (like a hole in a straw, otherwise it has too much suction and picks up oil). you can run a small line from the T to the air cleaner or something to filter the air, but dont connect it to any vacuum or other part of the sytem, jsut fresh air
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