GM 96068592
Tensioner

Service operations for the Timing Belt tensioner start with similar steps involving Crankshaft timing pulley removal together with a complete air cleaner disassembly. You must start by removing the Timing Belt cover through its eight bolts and one nut before taking out the cover. Ariston professional sequence demands that you align both timing marks (1, 2) on the Crankshaft before taking away the Timing Belt. Use your finger to fully elevate the tensioner plate before you disengage the Timing Belt from both the Crankshaft and camshaft Timing Belt pulleys. You should first loosen the belt tensioner's bolt and stud. After removing the Timing Belt it is essential to refrain from turning the camshaft or Crankshaft separately in order to protect the components from damage. Remove the tensioner mechanism together with the plate, spring, and damper while inspecting both the belt and tensioner for replacement criteria. Check their smooth functioning. Install the tensioner plate to the Timing Belt tensioner by placing its lug into the hole of the tensioner. Securing the Timing Belt tensioner and tensioner plate to the cylinder block should be done through one bolt and one stud without complete tightening. The plate must follow the tensioner in motion while checking mark alignment between the camshaft Timing Belt pulley v mark on Timing Belt cover and punch mark on Crankshaft Timing Belt pulley pointing to the arrow on oil pump case. To install the Timing Belt position the arrow mark so it matches the moving direction of the Crankshaft before making sure all timing points align. Set the tensioner plate into position before applying the tensioner spring without Timing Belt slack and tightening its stud manually. The procedure for tensioning the Timing Belt requires rotating the Crankshaft two turns clockwise followed by torquing the tensioner stud to 11 nm (97 inch lbs) and the tensioner bolt to 25 nm (18 ft. Lbs.). The correct alignment of both sets of timing marks must be confirmed along with inspecting the coolant pump-to-oil case seals. Reinstall the Timing Belt cover by inserting eight bolts with one nut then tightening all to 11 nm (97 inch lbs.). Replug the Crankshaft pulley along with the air cleaner assembly.

Disconnect the negative Battery Cable and withdraw the Timing Chain housing to replace the Camshaft Timing Chain tensioner. Pull out the spark plugs for easy rotation of the Crankshaft in aligning the marks of the timing to be aligned correctly before the disassembly. Do not turn the camshafts or Crankshaft following the removal of the Timing Chain tensioner to prevent valve and piston damage. Turn the Crankshaft for the number 1 cylinder to be at top dead center (TDC) of the compression stroke, keyway on the Crankshaft coincides with the mark on the block, idler sprocket arrow is pointing up, and guide pins on Camshaft sprocket coinciding with notches on the Cylinder Head. Unwind the tension on the Camshaft Timing Chain by rotating the intake Camshaft a little counterclockwise, then loosen the Camshaft timing chart tensioner and nub as well as 2 bolts (1,2) and remove the Camshaft timing chart tensioner and the gasket. Inspect the Camshaft Timing Chain tensioner for wear and damage and replace it when necessary as well as inspect the Timing Chain tensioner gasket for replacement. Push the plunger of the Camshaft tensioner into the body and add a retainer, install the gasket as well as the Camshaft Timing Chain tensioner and tighten the bolts to 11 nm (97 inch lbs.) and the nut up to 45 nm (33 ft. Lbs.). Remove the retainer of the tensioner and rotate the Crankshaft for 2 revolutions to align the keyway of the Crankshaft with the timing mark of the engine block , and make sure of the alignment of the guide pins of the camshafts with the notches of the Cylinder Head. Put engine oil on the timing chains, tensioner, guides, and sprockets, and after that install the spark plugs, while tightening to 25 nm (18 ft. Lbs.). Finally, install the Timing Chain housing and reconnect the negative cable back to the battery.

Begin by removing the crankshaft pulley, the retaining clips, and the engine wiring harness from the timing belt cover, followed by the coolant pump pulley.

Install the spark plugs, tightening them to 25 Nm (18 ft. lbs.), then install the timing chain housing and reconnect the negative battery cable.