Serpentine Belt Tension Test

The tensioner arm should move smoothly throughout its range of travel with firm spring pressure and without binding.

Serpentine belt tension test.

The tension in the serpentine belt is the main factor responsible for its operation. Open the hood and locate the adjustment screw that controls tension on the serpentine belt. Step 2 place the socket end of the socket wrench over the wing nut and turn clockwise to apply tension. Our inventory includes tensioners and belt component kits containing serpentine belts along with the idler pulleys or tensioners you need to make a full replacement and get back on the road.

Take a look at our selection of belt tensioners sourced from top aftermarket brands such as acdelco dorman duralast continental and uro. A bad belt tensioner is a likely cause of belt damage. The serpentine belt is located in the engine and is responsible for carrying power to critical components of your vehicle including the air pump power steering pump alternator and other. Examine the serpentine belt for unusual damage.

The serpentine belt tool kit makes it easy to precisely position idler pulleys and get belts set to the perfect tension. If your engine s belt has broken or cracked grooves is worn smooth or is fraying then the belt will need to be replaced. However if your belt is old and has not been replaced in several years it might just be normal wear and tear. Testing belt tension at a spot on the belt that s stretched between two nearby pulleys will give you a falsely taught reading.

If your specific gauge instructs you to do otherwise disregard this step. Includes 13mm 14mm and 15mm crowfoot wrench. Next test the tensioner spring and arm operation. This screw is typically a wing nut located near the alternator and is in plain view.

Instead find the portion of the belt that is stretched the furthest between two pulleys and use the gauge there. Fits idler pulleys requiring 15mm or 18mm hex or 3 8 in. This tool pays for itself ten times over the first time you use it to replace your serpentine belt.