....set up the temp heater bypass today and seems to have part solved the problem (Thanks to Steve for the encouraging phone call !)
No coolant overheating now.... and fan cutting in and out nicely......but temp gauge is reading really low -at best gets to just above 1/3 on the gauge...and drops when running....might be a dodgy sender?
Anyway - much happier now I know the new engine is OK
and that it is the ancillaries to sort out.
Might plumb in PRT as latest TF's / elise? Watch this space.
Rich