O2 sensor and white smoke

[Mark Bjork]

Thomas Burns wrote:
> 
> Sorry to open up this can of worms again, but I can't remember if there was
> ever a final conclusion...
> 
> Is the O2 sensor supposed to replaced as part of regular maintenance and if
> so, how often?
> 
> Also, let's talk about causes for white smoke. Not thick and bellowing but
> visible from behind during heavy acceleration from by high mileage 302HO. I
> was told by a friend that it is frequently caused by valve seals. I thought
> that leaking valve seals was mostly evident during starting by blue smoke!
> 
> -TomHmm, white smoke? Is your coolant level ok? If your engine has been 
"using coolant" lately, plan on tearing into it to check out the 
following:
Head Gasket (if your lucky)
Cracked Head 
Cracked Block
Leaking Intake Manifold Gasket

Good Luck,

Mark
snomo at ballcom.com