Tight fart Posted June 27, 2002 Share Posted June 27, 2002 what spec should the rad cap (thats on the thermostat)be? the new one i have just fitted has lost the coolant. Its marked as lbs.9 is this correct or have i another faulty cap? many thanks Richard T.F@O.F. Link to comment Share on other sites More sharing options...
Tight fart Posted June 27, 2002 Author Share Posted June 27, 2002 I'll phone caterham then. Link to comment Share on other sites More sharing options...
John Posted June 27, 2002 Share Posted June 27, 2002 Is this a X/Flow? 9 lbs sounds a bit low. I would have thought 13 would be nearer the mark. I would also only put it on the expansion tank and using a blanking cap on the thermostat housing. John Link to comment Share on other sites More sharing options...
Tight fart Posted June 27, 2002 Author Share Posted June 27, 2002 many thanks Link to comment Share on other sites More sharing options...
Graham Sewell Posted June 27, 2002 Share Posted June 27, 2002 Most xflows do not have a pressurised expansion tank. THat is a Roger King special! Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
R2D2 Posted June 27, 2002 Share Posted June 27, 2002 I fitted a pressurised expansion tank from a 4 speed TR7. It fits in the standard expansion tank position and seems to work well. I have a blank cap on the thermostat housing and a Stant 14psi on the expansion bottle. Thermostat is 74degC. Link to comment Share on other sites More sharing options...
ashaughnessy Posted June 27, 2002 Share Posted June 27, 2002 I have had trouble in this area in the past. R Phillips, who supplied you with the cap? The correct cap for a supersprint spec crossflow engine without a sealed header tank is a 13psi cap. I was supplied with a new cap by a well known place and was told "that is most definitely the correct cap, no doubt about it". It had "lbs 7" marked on it. I lost all my water on the motorway on the way home. I then got the real correct cap from Redline. It is marked as 13psi. I suggest for peace of mind, you get a new one from Redline and wouldn't trust any other. Anthony Link to comment Share on other sites More sharing options...
Casbar Posted June 28, 2002 Share Posted June 28, 2002 Fit an expansion tank (sealed unit). That will solve all coolant loss problems. The xflow Fiesta was fitted with a sealed unit, so all the bits are available through the Ford parts dept. Or get the bits off of Roger King Link to comment Share on other sites More sharing options...
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