E60 530d Fumes In Cabin
Hi, hello again, I have had a problem with fumes entering the cabin of my car for a long time now. The manifold was replaced with a E39 cast iron version ages ago, and there's no evidence I can see of gasket leaks. There's no soot around the manifold to head area or the turbo to downpour area.
One of the boost pipes leading to the intercooler had oil running down it, I found the clamp, the jubilee clip holding it on was loose so I tightened it. But the smell continues to come through. It's intermittent not continuous, but when you smell it recirculating the air stops it. It's maybe more of a oily crankcase smell rather than exhaust, but I can't be sure. It doesn't make you feel unwell or give you a headache, and it's not very strong, but it's there and irritating. Any ideas, I thought maybe the rocker cover but that would drop oil on the manifold? Thanks