what does it cost to have a valve lifter repalced on a 525i bmw? on 1995 BMW 525i

in the morning the car sounds like a jack hammer is coming from the engine.after 1 or 2 minutes it stops.

Asked by for the 1995 BMW 525i
approx 500.00 but u might want to repl them all for preventive maint while you in there
1 more answer , 1 more comment
should cost $3-500
thanks a bunch for your help.