Thanks Cooperman, I've had several bottles through the system with the previous rad- I think the flexing kept blowing it out at higher temps. I'll switch the pump out on the weekend. May have to lift the engine to clear the top bolt/crossbrace, but otherwise should be simple enough. In the meantime I'm carrying a top up bottle, and I'll run some quality flush to try and get all the old rad seal that may be swilling about out!
