Expansion tank!!! Help help!

[pug306driver]

as a matter of interest, did the new pug exp tank cap have a seal, where the top of the exp tank rim seals to the top of the tank cap, so any overflow is sealed within the small chamber and goes out thru the overflow stub, rather than leak past the cap to exp tank rim and go all over the alternator??

the cap will have a pressure seal on the sprung part of the cap with the "cooling down depression vent valve, in the middle of the pressure seal sprung area.

I have an expansion tank expansion tank, that holds the pushed out coolant due to expansion, and allows it to travel back to the pug expansion tank when cooling, so the pug expansion tank is always full. works well so far.

any cold patches on the rad when system is warm??