07 Apr 12 09:04, Mark Hofmann wrote to Roy Witt:   
      
      
      
    RW>> I don't think it was the Dexcool...I had that in my Z28 (alum block   
    RW>> & heads) for the first 5 years I've owned it and it was a three   
    RW>> years old when I bought it. That's 8 years on Dexcool without any   
    RW>> problems. Of course, I never put any water in it when it needed   
    RW>> topping off, I used more Dexcool. I flushed the entire system a few   
    RW>> years ago with a power flusher and put in some 'pink' coolant that   
    RW>> Harry recommended...   
      
    MH> I have never seen a 'pink' coolant.  There was almost a hint of pink   
    MH> in the Durango after the radiator failure.  :)  Mixing yellow   
    MH> antifreeze and reddish transmission fluid together makes for a nasty   
    MH> looking mixture.   
      
   Pink is a South Texas special. Because of the very high temps around here,   
   all summer long, it supposedly cools better than orange or green.   
      
   AFAIK, Yellow is a Ford factory antifreeze...   
      
    RW>> Harry didn't think much of it either and he's a GM ASE trained   
    RW>> technician.   
      
    MH> I have yet to find a mechanic that has had anything good to say about   
    MH> dexcool. The mechanic that did my engine swap used to work in a GM   
    MH> dealership.  He drives a 2001 Trans AM - and dumped the dexcool and   
    MH> put the yellow stuff in.   
      
   Tell him I have a factory sealed gallon of Dexcool I'll sell him, cheap.   
      
    RW>> Considering how well pan gaskets seal the crankcase these days, it   
    RW>> had to be something major.   
      
    MH> Oil leaks around the pan typically look worse than they really are.   
    MH> A slow leak can cover the entire pan and make it all realy messy   
    MH> looking.  That is what happened with my old engine.   
      
   Crankcases are pressurized with compressed air/fuel mixture blowing by   
   worn or sloppy piston rings. This is inevitable in internal combustion   
   engines. This is why a PCV 'positive crankcase (vent) valve' was invented.   
   Before PCV came into vogue, there was the 'road draft tube' venting blowby   
   and oil to the underside of you car, the road and atmosphere. Ford's   
   flathead V8s and Y-block V8s were famous - For Oiling Road Dirt - in the   
   day of road draft tubes. All other cars did this too, but none of them   
   lended a name to it better than FORD.   
      
    MH> It might leave a drop or two on the ground, but not much.  The pan   
    MH> was a mess, though.   
      
   I'll bet.   
      
    MH> I have also seen them leak in the rear seal area.  Gaskets don't cost   
    MH> much, but replacing them is almost always a major job.   
      
   Again, a blowby problem will force oil out of the rear seal.   
      
                   R\%/itt   
      
      
     ... Only those who will risk going too far can possibly   
     ... find out how far one can go ~ TS Eliot   
      
      
   --- Twit(t) Filter v2.1 (C) 2000-10   
    * Origin: Roiz Flying \A/ Service * South Texas * USA * (1:387/22)