Additionally, antifreeze can drip onto the belt if there’s a leak in the hoses. Either way, the coolant is going to damage the belt and lead to squealing. You will probably need to replace the belt. 6. Cold Weather. When temperatures drop, many aspects of the car are affected, including the serpentine belt. The part number is 90916-02500. The revised specs for tension say to install the new belt, start the engine and let it run for about 20 minutes to allow the belt to stretch a bit then shut it down. Measure the deflection of the belt in the center of the span between the alternator and the crank pulley. The only pulleys you should be able to turn by hand when the serpentine belt is not in place are: the water pump, alternator, and power steering pump pulleys. The air conditioning compressor has a clutch on it that should spin freely as well but it will not be rotating the internals of the compressor. The J35 in my Honda Ridgeline had an INSANELY tight serp belt when I changed it along with the timing belt & water pump recently. Loosening the tensioner as far as it would go still left me _almost_ unable to get that serp belt on. Haven't seen any ill-effects from the first 105k miles. If you find that you can’t tighten the serpentine belt or becomes loose very quickly, it could mean you need to replace the tensioner and the belt. Check the Serpentine Belt and Pulley Alignment. Pulley and serpentine belt alignment work in tandem. If the pulley is aligned, the serpentine belt will be aligned as well. Typical service factors for serpentine drives are no less than 2.0, but because of shock loading and relatively tight drive geometry, we choose a slightly more conservative service factor of 2.2. SI2MWzg.

how tight should a serpentine belt be