Today I replaced my fan clutch, actually, it's not really clutch mechanism, but gel filled fan hub thermostatically engaged. I replaced it because summer is coming and with a 603, I don't want to worry about overheating. All other cooling system components are recent, so it made sense.

Took it into town this afternoon and the temp gauge barely climbed above 80c, down a few degrees from what had been normal. So replacing that fan clutch did make a difference. .....BB