ok guys i have a few questions i have an 2001 audi a6 quattro 4.2l that i bought around 3 months ago it has 136000 miles and on cold start it makes a terrible sounding clatter for a few seconds then goes away but i can also hear it when the car is at idle and i barley tap the gas other than that makes no noise also i am having prob with p0102 maf or vaf replaced maf and still same problem i love this car its great but noone can seem to tell me whats wrong with it please any help is appreciated thx!!

blake

 

wow 70 views and no replies that makes me wonder )

 

You may have a leaking hydraulic lifter. When the engine sits the oil leaks out of the lifter and you end up with a lot of valve clatter until the car's oil pressure pumps it back up. This takes longer in cold weather. As the lifter leak gets worse it may also make noise at idle. This will not hurt anything but it is annoying and eventually you make get a MIL because the valve opening and closing will not be at the ideal time and the valve will not open completely. If the lifters are the problem they can be replaced. They are not very expensive but you have to pull the camshaft(s). If there is only one bad lifter you can just replace the one.

 

So that terrible noise isint creating wear with metal on metal ? Basicly its not damaging engine? Sure does sound terrible

 

If it goes away shortly after starting and it is due to a stuck or leaking lifter then probably not. I do not know if your engine has a hydraulic cam adjuster. If it does and that is the problem then you could have a major problem developing. That will usually throw a MIL code prior to catastrophic failure. Have it looked at by a dealer or a good mechanic.

 

Does anyone know and good audi mechanics in or around denton texas thx!

 

And by mil u mean manufacture indicator light?

 

Malfunction Indicator Light (Check Engine Light)