Question about 2001 Audi A4
I have a Audi A4 2001 and when I first start the engine it make a knocking noise and then goes away. But it happens every time i start it. What could this be ????
Depending on the period of time and intensity of the knock ? If it is a rapid short ,loud knock then disappears altogether you may be dealing with a cam chain tensioner that is loosing oil pressure when the car is standing. A loose cambelt tensioner can increase the noise .
Posted on Jul 29, 2008
I had the same problema and it was the cam chain tensioner. It is a rather expensive part and can be done yourself if you are extremely careful to mark your timing before you begin. You can find the part form ECS tuning for around $350.00 but they can go as high as $600.00.
Posted on May 14, 2009
I have the same problem on my 2002 audi A4 1.8T quattro.
After doing much research I have narrowed the causes down to two issues:
It could either be the Hydraulic Valve Lifters
The flywheel (also known as Flexplate) that may be cracked.
It's now a matter of finding a reliable independent mechanic who will check which of these is the issue because the Audi dealership keeps telling me that this is a normal sound. However, I don't see anything normal in a "luxury" turbo car making a racket like a diesel engine would.
Posted on Feb 16, 2009
Sounds like the hydraulic valve lifters - confirm if noise is from cylinder head (upper part of engine) If so try removing the sump and cleaning the sump and oil pump from carbon sludging. If this does'nt help you will need to replace the lifters.
Posted on Jul 27, 2008
SANSUI08 / CHECK COILS AND SPARKPLUGS THEN FUEL INJECTORS.............................................................AMDES. TIMING IS OFF.....THE PISTONS ARE HITTING THE VALVES THAT WEE BIT( NOT GOOD).THE NOISE WILL BE THERE ALL THE TIME (OVER 1200 RPS) JUST YOU WILL NOT HEAR IT AS CLEAR AS ENGINE SPEEDS UP....WATCH YOU DO NOT START BENDING VALVES ETC ETC.........................
Posted on Feb 19, 2009
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Posted on Jan 02, 2017
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