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. Use a shop rag to clean all components as part of your regular maintenance. If the squeaking continues, lubricate with a light coat of spray-on graphite lubricant. Put this lubricant directly on the grooved surfaces before re-installing the belt and pulleys. Check that all fasteners are tight. A belt that is too long (just an inch or less) may slip, make noise and wear prematurely. It will also cause the tensioner to work harder and fail sooner. 5. Watch the Flutter. Watch the belt while the engine is running. If you see a lot of movement or flutter in the belt, the tensioner is probably weak or sticking and should be replaced. The tensioner is automatic, and shouldn't be forced. Remove the belt and sight across the pulleys to see which one is crooked. Then try spinning each by hand or with shop air. They should all spin smoothly (but not necessarily freely). The alternator will take a little effort to spin, but should keep going for a second or 2.
All that said, you can get away with not bleeding anything if you just take your time. You fill it up slowly, massage hoses, top off. Start car, level goes down, shut off, top off again. Test drive 3 miles, watch the temp, check operation of heat, shut off, let sit for 5 minutes, slowly remove cap, top off again.
Use a ruler to check the belt’s tension. In many applications, the serpentine belt needs only to be reasonably tight. Because of this, a belt tension gauge is not necessary for most vehicles. Instead, use a ruler to measure the distance between the two furthest pulleys and find the midway point.
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 serpentine belt is somewhere in between these two extremes.To check the tension of a serpentine belt
Step 12: Tighten the tensioner pulley and tighten the bolts. Using the same method as above, apply pressure to the tensioner pulley until the belt is tight on all three access points. Maintain pressure on the tensioner pulley and tighten the bottom then top bolts to tighten the power steering belt correctly. Step 13: Hand test the belt
They should be pretty tuff to move. Or see if you have any slack in your belt. I think +/- a half inch. No slack. Belt is tight. As is the tensioner. I have to put a socket on it every time that it kicks forward and it's not easy to move. 08-01-2011, 03:34 PM #8. blackcar. In this video I show how I replaced the serpentine belt and tensioner on my 2018 Chev Please remember to subscribe and share so I can continue making videos! In this video I show how I replaced
Belt Tension Calculator. Proper belt tension ensures optimum performance of a vehicle's accessory belt drive system. Select from the dropdown options below to find the appropriate belt tension for your belt. ABOUT US.

Your engine should have run for quite a while even after the serpentine belt snapped. The battery should have provided enough power to run the electricals for a while. You should have seen a charging system light first, and then it should have started overheating, since the alternator and water pump weren't turning, but the engine was running.

A typical spring-loaded serpentine belt tensioner which applies constant pressure on the belt to keep it tight. A quick, repeated chirp from the belt is usually more indicative of a belt pulley wheel that's misaligned (look for frayed edges on the belt as well). A frayed accessory belt is a sign of a misaligned pulley wheel.
Learn why serpentine belt tension is important for optimal performance and longevity, and how to check and adjust it with a tension gauge or a ruler. Find out the sweet spot between "too tight" and "too loose" for your vehicle, belt, and accessories.
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    • how tight should a serpentine belt be