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i recently founf out my clutch fan wasnt kicking on properly and helped my car to overheat.

my one had the original 1990 rb20 clutch fan on it and was replaced with a fan from a 1989 model. blades are definately differnt as i had to trim them to get them to fit under the cooler piping, whereas my original one did not have to be trimmed.

now my car sounds like those old falcons. fan is kicking on a lot but it sounds a bit stupid at times, but has fixed my overheating problem.

now my question is: do different fan blades make different noises. im talking in louder and quieter. i like the fact that the clutch fan i have now is working properly but the blades are just too dam noisy. my fan that i took off had evenly distributed blades whereas the one i have on it now has different looking ones and they are not distributed around the centre evenly. its just the way it was made.. if you guys understand that.

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https://www.sau.com.au/forums/topic/158717-clutch-fan/
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"irregularly placed cooling fan blades bring new quiteness"

thats a quote from Nissan marketing material.

i know exactly what you mean, long story short that type of blade should work better and be more quiet, then the even spaced design.

how many blades 7 or 9 on the fan you have?

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https://www.sau.com.au/forums/topic/158717-clutch-fan/#findComment-2948233
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