Thanks alot for these. Good info- My prob seems simular ..I began noticing a gas smell occasionally ,even while vehicle is standing (engine off) Its running good these days but temp gauge is approaching too hot.
I tapped the thermostat housing and it seemed to help.
My plans are to flush coolant system, the replace Thermo with a 192 degree Thermo, then test the charcoal cannister..But now you got me concerned about carbon build up
My gas cap seems to be a primitive simple one..unvented
So i will concentrate on charcoal device
Please advise further if you will
Thanks