The service schedule for my '08 G35 has a "special premium schedule that says replace the belt every 30k miles. For regular schedules 1 and 2, they say "inspect" it and give no change interval. Sadly, on some Infiniti forums, people preach "change the serpentine belt every 30k miles ! Infiniti says you have to !". It the noise stops, it tells you the belt needs tightening. There is a belt tensioner adjustment that is usually located half-way down the front of the engine. Normally there should be about 3/4-inch of play in the belt, and the tensioner can be adjusted to return the belt to normal tension. A very old belt may be so worn that it's impossible 4. Install the new belt. Replacing the serpentine belt is as simple as threading it into position, cranking the tensioner and slipping the belt over the tensioner pulley, or nearest pulley up top. Belt tensioners are mostly spring tension. Once installed, the spring retains pressure to the belt. Place the timing belt on each timing belt pulley and ensure proper engagement between the timing belt pulley and timing belt teeth. Lengthen the center distance or adjust the tensioning idler to remove any timing belt slack. Using a tape measure, measure the span length of the drive in inches. Refer to dimension “P” in the diagram above. Depending on your engine, the serpentine belt replacement cost is between $100 and $200. Most vehicles do not need a special serpentine belt tool, but rather a 1/2" breaker bar and a socket on the serpentine belt tensioner to relieve the tension from the belt. Check out our parts page for coupons on new belts for your RX300! A serpentine belt is a strong rubber belt that controls most of the accessories inside the engine system. It should be in a middle range that is highly suitable for your engine system. The tension of the belt depends on the pulleys and connections, and it should not be too loose or too tight. Learn how to check and adjust the tension of the serpentine belt with a generator or an automatic tensioner. How tight should a fan belt be? If it is a serpentine belt the automatic tensioner will adjust the belt for you. If it is an older "V" type belt--there should be 1/2" "play" at the middle of the A serpentine belt is a vital part of a vehicle’s engine, and it needs to be tight enough to function properly. If the belt is too loose, it can slip off the pulleys and cause the engine to overheat or stall. If the belt is too tight, it can wear out prematurely or break. The ideal tension for a serp 01. The crankshaft drive pulley is installed first using the provided 3/8-16x1.00 socket hex head and 3/8-inch flat washer hardware. It is suggested that you use thread locker on bolt threads and zSBSf19.

how tight should a serpentine belt be