Audi A6 3.0 TDi 2012, ratling noise from engine

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LN-TAL

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Hi,
Audi 2012 3.0 V6 TDi (CDUC engine code). There is a noticable "rattling" noise when starting up after the engine has been off for more than a few minutes. The sounds suddenly goes away after 1-2 sec (after the oil pressure has build up?). Is this normal, or is it something wrong ? The car has aprox. 83k km on the cluster.
 
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Jack@European_Parts

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Part Plugged oil filter and or check valves faulty in engine ..........ahh change oil/filter.

Maybe try slightly heavier viscosity.
 
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LN-TAL

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Thanks for reply, just changed oil / filter and the noise (not very loud, but noticable) are just the same as before. I noticed at the first startup after the oil change the noise was present a few sec. longer than normal (I think). Where are these check valves located on the engine ? Do you need to take the whole engine apart, or are they located on the outside somewhere ?
 
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Jack@European_Parts

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Time to open the EPC + repair manual..........review it.

Maybe even consider the oil pump bypass is faulty/dirty or oil pump is weak from contaminates.

Magic answer questions......No auto-scan :banghead:
 
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Uwe

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Moving to General VW/Audi Repair...

-Uwe-
 
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