Next time you work with a drive belt, timing belt, or timing chain, you’ll likely have to loosen a tensioner pulley to remove it. Subsequent these general suggestions and specific guidelines from your own Car Pulley Belt owners manual or restoration manual, your belt or chain will function for the life span of your car.
Toyota and other timing belt tensioners are loosened simply by removing them from the engine. You need to gradually compress them in a bench vice and lock them with a pull-pin before reinstallation.
Hydraulic (not hydraulic-damped) tensioners are nearly always positioned in the timing case, mostly upon vehicles with timing chains, while some are used with timing belts. Hydraulic tensioners are driven by oil pressure from the engine essential oil pump and could press on a tensioner pulley (timing belts) or stress slipper (timing chain). You will likely need the year, make, and model details, and you may have to use special equipment for this sort of tensioner pulley.
Typically, a hydraulic tensioner must be “reset” and locked after removing it from the engine. Remove the lock only following the tensioner, pulley, or slipper, and timing belt or timing chain are set up and aligned.
The spring maintains tension, while the hydraulic damper keeps it from bouncing under load changes. This prevents timing belts and timing chains slapping and jumping the teeth and retains drive belts from slipping and producing sound. To loosen a drive belt springtime tensioner pulley, refer initial to the repair 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 correct tool, release stress on the belt. You’ll need to hold some springtime tensioners while slipping on a fresh belt. Others may possess a locking mechanism, such as a hole for a locking pin or hex essential.
To loosen an NAI tensioner, loosen the locking nut or bolt, after that back off the tensioner screw. Force the pulley toward the various other pulleys or components, loosening the belt.
Spring tensioner pulleys, as the name implies, make use of a springtime 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 costly but don’t require modifications and are less susceptible to user error.