It's not unknown to get a slight weap to the rear of the exhaust manifold between the cylinder and the head. This gives off fumes not unlike a petrol leak and can go practically unnoticed because the engine gets so hot it burns most of it off. Hence the smell.
I've had the crankshaft oil seal changed twice now. Oil from this tends not to go back any further than the chassis cross member at the front of the engine.
Did they have to remove the engine to replace that front crank seal?
Mine is leaking and it is definitely the seal at the crank pinion. The machine has 512 miles on it and has been leaking since day one.
![[Linked Image]](https://www.tm-img.com/images/2019/08/16/IMG_0359.jpg)
![[Linked Image]](https://www.tm-img.com/images/2019/08/16/IMG_0362.jpg)
These photos were taken after 50 miles of driving and now it has 500+ and I am sure it looks worse.
.
Another thought about that seal; do you think it could increase oil temperatures?