Question 1

How to check the operation of front hydraulic valve lifters if they become excessively noisy on Audi A3?

Accepted Answer

The valve lifters are self-adjusting and require no attention while in service; however, if they become excessively noisy, their operation can be checked. Start the engine and run it until it reaches normal operating temperature, then increase the engine speed to approximately 2500 rpm for 2 minutes. If any valve lifters are noisy, remove the camshaft cover and turn the crankshaft using a socket or spanner on the crankshaft sprocket bolt until the tip of the camshaft lobe above the lifter to be checked is pointing vertically upwards. Check the clearance between the top of the lifter and the cam lobe using feeler blades; if the play exceeds 0.1 mm, renew the relevant lifter. If the play is less than 0.1 mm or there is no play, press down on the lifter with a wooden or plastic instrument. If free play in excess of 1.0 mm is present before the lifter contacts the valve stem, renew the relevant lifter. Finally, refit the camshaft cover.

Question 2

What precautions should be taken when working on the Camshaft and Valve Lifter to avoid setting a trouble code on Audi A4?

Accepted Answer

This procedure can trigger a set trouble code; this can only be cleared by visiting a dealer service department or a repair shop that has the required scan tool that is capable of aligning the cam sensor. The camshafts and lifters must be carefully inspected before fitting and camshaft endplay must be inspected before removal. Even though hydraulic lifters are self-adjusting and do not need periodic servicing, there is a process of verifying hydraulic lifters that are excessively noisy. In the case of the 1.8L engine, firstly, take out the engine cover, valve cover, timing belt, camshaft sprocket, secondary air combination valve, and camshaft position sensor. Indicate the camshaft drive chain position against the sprockets and rear bearing cap with 16 rollers between marks. Tension the camshaft drive chain with either a special tool or a homemade tool. Identify the position of the camshaft bearing caps, loosen and remove the bearing cap nuts in a particular sequence, and remove the camshaft adjuster, and the two camshafts together with the adjustable. Take the lifters out of the cylinder head, and in order. In the case of the 2.0L engine, the steps include that of the cylinder head, the camshaft position sensor, clamp down on the camshafts using a locking tool, compress the camshaft drive chain tensioner, and unscrew the camshaft adjuster and guide frame. Check the bearings surfaces of the camshafts, camshaft journal and bearing clearances, check the camshaft runout, and camshaft endplay. Compare camshaft lobes and determine wear of lifters. Installation of the 1.8L engine includes lubricating the hydraulic lifters, fitting them into their bores, cleaning mating surfaces, aligning the marks of the drive chain, and fitting the camshafts in place. Fit the drive chain tensioner, bearings caps and camshaft oil seals and place the camshaft sprocker and timing belt. Clean and grease the camshafts and bearing surfaces, install the camshafts, guide frame, and camshaft adjuster and check the alignment of the timing belt of the 2.0L engine. The rest of the installation process is the same but in the reverse order of removal making sure that both TDC marks align once the engine has been rotated through two complete revolutions.

Genuine Audi Valve Lifter

10 Valve Lifters found

Audi Valve Lifters Part Number: 079-109-423-B

Audi Valve Lifters Part Number: 057-109-521

Audi Valve Lifters Part Number: 06M-109-423-A

Audi Valve Lifters Part Number: 03L-109-521-A

Audi Valve Lifters Part Number: 022-109-423-C

Audi Valve Lifters Part Number: 04E-109-423-C

Audi Valve Lifters Part Number: 07K-109-423-A

Audi Valve Lifters Part Number: 022-109-423-D

Audi Lifter Part Number: 022-109-423

Audi Lifter Part Number: 079-109-423-A

Audi Valve Lifter

Audi Valve Lifter Parts and Q&A

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