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Old 16-01-20
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Location: Adelaide, South Australia.
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A catch can will not remove all oil from the crankcase air, it is dependent on the efficiency of the filter separator and how well it is maintained. If you fit a catch can ensure it has a pressure relief valve built in so if the filter becomes blocked then the crankcase pressure can not build up.
Inlet manifolds will still get a soot/carbon buildup even with a catch can installed but it will take much longer.
Only way to eliminate this is to stop the EGR system from operating and this is illegal in Australia.
My view is EGR as a pollution control only works when everything is clean, and as the deposits in the manifold build up the emissions from the engine increase. At some point there will be a cross over where the engine is emitting more pollution because it is using more fuel.

OJ.
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Last edited by old Jack; 19-01-20 at 12:45 PM.
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