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.

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2 answers 1 comment
should cost $3-500
thanks a bunch for your help.
approx 500.00 but u might want to repl them all for preventive maint while you in there