Exhaust Fumes In The Car

[CM2007]

Hi chaps, wonder if I can run this one past you. I have a theory my 1995 V6 Galaxy is sucking exhaust fumes into the cabin of the car. There has been a funny smell inside the car on and off but sometimes when I top the oil up I have been known to spill a bit on the exhaust manifold and just put it down to that but my wife has been getting headaches recently and I drove the car yesterday and the day before and I've had a headache since yesterday evening, also the kids have been being sick on and off (being winter you can expect kids to be ill but too much of a coincidence?)

 

I wonder if anyone has had a similar problems and/or can tell me of where to look. I will check all joints around the manifold but usually I'd expect the exhaust to be louder if they'd failed.

Any help on this one is greatly appreciated as I need the car on the road ASAP.

 

Many thanks

Mike