porterdave Posted November 25, 2014 Share Posted November 25, 2014 Evening guysI got just one question for you, I have a standard 1981 tr7, what I want to know is, should the rad hold its pressure even after a week because every time I check the expansion tank before a run its still under pressure, is this normal. Quote Link to comment Share on other sites More sharing options...
Beans Posted November 25, 2014 Share Posted November 25, 2014 Are you sure it is pressurised.More logical explanation is that, due to the coolant contracting when it cools, the system develops an underpressure.And when you remove the cap from the header tank, air will be sucked in. This sounds exactly the same as air escaping under pressure. Quote Link to comment Share on other sites More sharing options...
junkuser Posted November 25, 2014 Share Posted November 25, 2014 A1 Beans. Quote Link to comment Share on other sites More sharing options...
porterdave Posted November 25, 2014 Author Share Posted November 25, 2014 Thanks for getting back to me, so its nothing to worry about then :o Quote Link to comment Share on other sites More sharing options...
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