The Traction Avant has a fairly large oil cap that at least on my car is a loose fit. Underneath it there is a metal plate with holes in it which let the oil drain into the engine when filling and presumably stop the oil from splashing out.
Unfortunately on my car, these holes had been significantly enlarged and that means oil was dribbling down both sides of the engine and creating smoke when it hit the hot exhaust manifold.
My assumption was that the extra holes were leading to excess oil splashing up and leaking out of the cap. […]
