ChristopheC Posted February 9, 2016 Share Posted February 9, 2016 Hi all,During the maintenance, I noticed some drops of oil on the bottom side of the inlet manifold. The engine is a standard sigma 125 (Academy car - season 2008). There's no oil catch tank. The engine uses some oil at a non-alarming rate : 0.5 to 1 liter for 1000 spirited road miles but can burn 1 liter during a trackday. It seems to use more oil if the level of oil is topped to the max, therefore I try to keep a half level (between min and max). The engine is running good, no smoke.Could the Crank Pressure Release Valve be stuck ? I had a look but it seems I have to remove the whole plastic manifold and some water pipes to get there... quite an annoying job just to "have a look". Have other members had this issue ? Any tips (or procedure) in order to remove just the essential parts ... before dismantling everything to reach the valve ?Is it a known problem ?Thank you Link to comment Share on other sites More sharing options...
Ivaan Posted February 9, 2016 Share Posted February 9, 2016 I don't know the Sigma engine, but isn't it more likely to be a leak from the camshaft cover gasket, just running down the front of the intake manifold? Link to comment Share on other sites More sharing options...
ChrisC Posted February 9, 2016 Share Posted February 9, 2016 The oil breather is located under the inlet manifold. My sigma uses no oil on the road, but track days the catch tank fills up with some nasty stuff. I bet you have a split hose on the oil breather under the inlet manifold. Link to comment Share on other sites More sharing options...
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