HI! I just want to be enlightened about the radiator fans installed on toyota liteaces. AFAIK this type uses silicone, such that, when the engine is cool, it doesnt rotate as fast as when the engine is hot, am i correct guys? Well, this is not the case on my liteace anymore because i observed that the rotation is constant whether the engine is cool or hot. is there anything i can do about it? TIA!