car pulley belt

The next time you utilize a drive belt, timing belt, or timing chain, you’ll likely have to loosen a tensioner pulley to eliminate it. Subsequent these general recommendations and specific Car Pulley Belt guidelines from your 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 need to gradually compress them in a bench vice and lock them with a pull-pin before reinstallation.
Hydraulic (not hydraulic-damped) tensioners are almost always located in the timing case, mostly on vehicles with timing chains, though some are used with timing belts. Hydraulic tensioners are run by essential oil pressure from the engine essential oil pump and could press on a tensioner pulley (timing belts) or tension slipper (timing chain). You’ll likely need the year, make, and model details, and you may need to use special equipment for this sort of tensioner pulley.
Typically, a hydraulic tensioner needs to be “reset” and locked after removing it from the engine. Take away 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 tooth and will keep drive belts from slipping and producing sound. To loosen a drive belt spring tensioner pulley, refer first to the repair manual or owners manual’s specific calendar year, make, and model info.
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 pressure on the belt. You will have to hold some springtime tensioners while slipping on a fresh belt. Others may have a locking mechanism, like a hole for a locking pin or hex key.

To loosen an NAI tensioner, loosen the locking nut or bolt, then cool off the tensioner screw. Force the pulley toward the various other pulleys or add-ons, loosening the belt.
Spring tensioner pulleys, since the name implies, use a spring to hold tension upon the belt. Most, if not absolutely all, spring tensioner pulleys are NAI tensioners you need to include a hydraulic damper. They are more complex and costly but don’t require adjustments and are less prone to user error.

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