exhaust pressurizing cooling system??????

[JShadzi at aol.com]

In a message dated 11/9/00 10:41:19 PM Pacific Standard Time, 
marcswanson at mediaone.net writes:

<< Someone just posted a link to a place that sells Modine radiators and I
 checked it out since my 4ktq's radiator is leaking at the seam near the top
 (a fresh puddle filling up that little crack on top whenever I go for a
 drive).  One of the pages on that site talks about types of radiator
 failures and when I came upon this one
 (http://www.radiatorinfo.com/blown.html ), it describes my symptoms but
 seems very far fetched.  I just don't see how the exhaust gasses could
 penetrate the coolant jackets?  Besides the fact that if the pressure got
 that high anyway the expansion tank cap would just let off the excess
 pressure right?  So am I nervous over nothing other than a radiator that is
 past its service life?
  >>

    I know the failure you are referring to Marc, but I highly doubt it.  
What I have found on my car since the turbo converson is that water temps 
just get really high, especially after the car is off.  Don't know if you 
have the afterrun system hooked up (I think you do) but that is a time when 
heat can really build in the cooling system, often allowing temps to get 
quite high.  My Brother's 4kq has the same problem as yours, coolant is 
seeping out the endtanks, your radiator just need a good refreshing....
Javad