car pulley belt

The next time you utilize a drive belt, timing belt, or timing chain, you’ll likely need to loosen a tensioner pulley to eliminate it. Subsequent these general recommendations and specific instructions from your own owners manual or repair manual, your belt or chain will function for the life of your car.

Toyota and additional timing belt tensioners are loosened simply by removing them from the engine. You must slowly compress them in a bench vice and lock them with a pull-pin before reinstallation.
Hydraulic (not hydraulic-damped) tensioners are nearly always located in the timing case, mostly on automobiles with timing chains, though some are used in combination with timing belts. Hydraulic tensioners are powered by Car Pulley Belt essential oil pressure from the engine essential oil pump and could press on a tensioner pulley (timing belts) or pressure slipper (timing chain). You’ll likely need the entire year, make, and model details, and you may have to use special equipment for this kind of tensioner pulley.
Typically, a hydraulic tensioner needs to be “reset” and locked after removing it from the engine. Remove the lock only after the tensioner, pulley, or slipper, and timing belt or timing chain are set up and aligned.

The spring maintains tension, as the hydraulic damper keeps it from bouncing under load changes. This prevents timing belts and timing chains slapping and jumping teeth and will keep drive belts from slipping and producing sound. To loosen a drive belt springtime tensioner pulley, refer 1st to the restoration manual or owners manual’s specific season, make, and model information.
You might need a special tool, but many spring tensioners have a square hole, for a 3/8” or 1/2” breaker bar, or a hex or square protrusion for a wrench or socket. Using the appropriate tool, release tension on the belt. You’ll need to hold some spring tensioners while slipping on a fresh belt. Others may possess a locking mechanism, such as a hole for a locking pin or hex key.

To loosen an NAI tensioner, loosen the locking nut or bolt, then back off the tensioner screw. Drive the pulley toward the additional pulleys or components, loosening the belt.
Spring tensioner pulleys, as the name implies, use a spring to hold tension upon the belt. Most, if not all, springtime tensioner pulleys are NAI tensioners and include a hydraulic damper. They are more technical and expensive but don’t require modifications and are less susceptible to user error.