It'd better not be...the water pump's only about nine months old. I'll check it anyway, but I don't think it's that. Last time it went there was no rattling until it got really bad - then I found out where the coolant had been pissing out from
I'm certain I haven't displaced the belts - been very carefully to mount the trigger wheel in a way that avoids that. Besides, I'm sure it was doing it before the weekend, it's just that it isn't masked by the ignition now.
It actually seems to be running pretty well - it's rattly but pulling fairly well. Then again, compared to how it was with the feeble spark I had before anything would seem good.