400EX smoking and clicking noise gasket/valves???? Help

[qlloyd]

I have a 2007 400ex and some white smoke comes out from the header and it smells weird. also there is a weird clicking noise in the engine. Please give me some advice and help me!!! Could it be a head gasket ??

[Atvers]

Welcome to the forum, have a compression test to know the health of the motor. Also check your rad coolant if its milky in color than the head gasket is shot.

[qlloyd]

Welcome to the forum, have a compression test to know the health of the motor. Also check your rad coolant if its milky in color than the head gasket is shot.


I don't know much about my 400ex what is a compression test how do I do it and where and how can I check the coolant? Thanks for ur help

[qlloyd]

And my 400ex is air cooled not liquid cooled is there a radiator?

[OZ-T]

And my 400ex is air cooled not liquid cooled is there a radiator?

No such thing, just an oil cooler. If the oil is milky, then you got some water in it somehow, only way I can see that happening is if you stalled it in a deep water crossing and drowned the motor.