[DeTomaso] expansion tank cap

[JDeRyke at aol.com]

The 'expansion tank' is the bigger of the two and does NOT need a pressure 
cap since all it does is catch the overflow. The shorter one is the so-called 
'swirl tank' and does need a real pressure cap. Its been found that Euro caps 
are a little longer than U.S caps, and the base of the stock swirl tank neck is 
often rough, making a good seal with an older rubber washer in a cap 
difficult. Many owners take the swirl tank to a rad shop and have the Euro neck 
desoldered and a std US neck reattached, making sure the bottom is smooth where the 
cap touches. This fixes both problems. 
Note that sometime in '72, both the swirl tank and the expansion tank were 
nickel plated inside and out under that flat black spray paint, which usually 
keeps the mild steel tank from rusting quite as badly when owners don't change 
coolant each year.   Cheers- J Deryke


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