A valve tick is a distinct metal on metal sound tink tink tink, Wheras an exhaust leak is more of How do i say this (tsi tsi tsi tsi)there is no ending clank sound with exhaust simply because it is air.
The oil leak is coming from the valve cover gasket and leaking onto the exhaust manifold, the rubber valve cover gaskets get hard from the engine heat and start to leak, you will have to replace the rubber valve cover gaskets to stop the oil leak
No, that's kind of an old wive's tale anyway! The valve material is too good now.
Leaking valve cover gaskets would leak onto the exhaust pipes under the hood of the car.
I suppose it could but more than likely you have a stuck egr valve or some other leak.
must be a leak cant think of any other way check all joints and manifold incl lambda sensor failing that cracked cylinder head from exhaust valve but i wudda thought the running would be impaired
Yes it sure can and will if the valve covers are leaking oil and the header gaskets are worn out/ leaking.
If the valve cover gasket is leaking it will allow oil to leak onto the hot exhaust manifold where it will smolder causing smoke in the engine compartment.
2 most obvious signs of exhaust leak are noise and smell of exhaust fumes
The only thing that could leak oil in that area is the valve cover gasket.
Yes, a prolonged exhaust leak will eventually cause problems with your cylinder head. The leaking exhaust is very hot and you can cause small cracks in the head if you don't repair the problem promptly. If you can hear the exhaust leaking, it may already be too late! Get it checked out soon!
Check your exhaust for blue smoke, you may need a valve job or new rings.
Do you have an exhaust leak? Do you happen to have have an exhaust leak or a damaged water pump bearing?