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Lifter noise with cold engine ??
In message <3362E738.6CA5@netaccess.on.ca> Solomon Ngan writes:
> Sometime ago there were discussions regarding hydraulic lifter noise
> with cold engine (sounded like engine knocking).
There shouldn't be any relationship with _temperature_. It's perfectly normal
for an engine that's been standing for a while to rattle before the lifters
fill with oil - if the oil filter has the mandated non-return valve, this
should only be a few seconds. Audi's documentation says the noise should be
gone entirely after two minutes above 2000rpm.
> Is it damaging to the engine ? It sure does to the pride of a proud
> audi 90 owner.
Cam and valve wear is slightly increased.
> Can someone kindly recall how to get rid of this lifter noise ?
a) Check the oil level.
b) Change the oil, making sure the new filter has a non-return valve.
c) Change the lifters. Mine lasted around 140k miles. A longish job, but
not hard providing you have the right documentation. I did it two weeks ago.
Committee Member, UK Audi [ur-]quattro Owners Club