The 4.6 liter SOHC , V8 engine in a 2000 Mercury Grand Marquis has ( 1 ) timing CHAIN to each cylinder head ( so there are two timing CHAINS )
The 2005 Mercury Grand Marquis , 4.6 liter SOHC , V8 engine has ( 2 ) timing chains ( 1 timing chain to each cylinder head )
Worn timing chain?
In a 1997 Mercury Grand Marquis : ( YES ) the 4.6 liter Single Over Head Cam , V8 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
The engine in the Mercury Villager does not use a timing chain, it uses a timing belt. The recommended belt replacement interval is 105,000 miles.
The timing chain can not be repaired, it must be replaced. To do this you must disassemble the front of the engine. The fan, belt, dampener, water pump and timing chain cover must be removed to gain access to the chain.
On a 2002 Mercury Grand Marquis : No , the 4.6 liter Single Over Head Cam , V8 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
You never need to replace the timing chain if the engin use timing chain(not timing belt).
The 3.0 liter V6 engine in a 2006 Mercury Montego has a timing CHAIN