Genuine 2015 Audi A3 Timing Belt

2015 Audi A3 Timing Belt Parts and Q&A

• Q: What is the primary function of the toothed timing belt and what steps are involved in its inspection and replacement on 2015 Audi A3?

  A: The toothed timing belt mainly serves the purpose of driving the camshafts and in case it slips or ruptures, there are chances that the engine may suffer serious damage due to disrupted valve timing and contact between the piston and valve timing. Then, it is essential to ensure proper tensioning and frequent wear or deterioration check. Fuel pump Before work commences you should remove the fuse to the fuel pump, or you need to disconnect the battery negative lead or be sure that you have disconnected the battery. Use the handbrake to raise the front of the car, and place it on the axle stands. Take out the engine undertray, right-hand front roadwheel and wheel arch liner and on turbo models, the charge air hose. Take off the plastic cover/air filter of the engine, the auxiliary drivebelt and tensioner, the fuel supply, breather line and (where applicable) the vacuum line. Take away the activated charcoal filter and hoses, loosen the screen wash filler neck and move the coolant expansion tank and may disconnect coolant hose. In engines that have a split belt cover, pull off the upper timing belt cover and unscrew the tensioner of the auxiliary drivebelt and then position the engine to TDC. To unscrew the pulley and remove it out of the crankshaft sprocket, hold the crankshaft still, and ensure that the engine is in TDC and take a note of the position of the crankshaft sprocket. Unbend the exhaust front pipe, unbolt the bracket of the exhaust mount, disconnect the driveshafts, and loosen the air conditioning pipes without breaking the refrigerant line. Elevate the engine by a hoist, unsecured the rear engine torque arm, and the right-hand engine mounting and bracket to gain access to the timing belt. Unscrew timing belt covers and ensure that the engine is at TDC indicating normal direction of movement of timing belt in case it has to be refitted. In the case of models that do not have a split belt cover, a special tool to relieve tension on the tensioner is used, and in the case of models that have a split cover loosen the tensioner pulley nut. Take the timing belt off the sprockets, check it in relation to contamination or damage and then apply a new one where required. During refitting, take care that the timing marks of the camshaft and crankshaft sprockets are in line, loop the timing belt beneath the crankshaft sprocket, and position around other sprockets. Install the lower timing cover, screw in the bolts and position the tensioner roller in place using the correct placement of the roller in position after which the tensioner can be adjusted. Turn the crankshaft 2 full revolutions with TDC, and alignment of the timing marks, adding or removing tension as required. The rest of the steps are in a reverse order of removal.