The 4.0 liter SOHC , V6 , has ( 3 ) timing chains and the 5.0 liter V8 has ( 1 )
timing chain , if that's what you are asking ?
There are two head gaskets in the V 8 1999 mercury mountaineer
There are seat belts for ( 5 ) people
( 5 quarts ) with engine oil filter change
the four door speakers are 6x8 and the sob if you have one is 8"
According to the 2004 Mercury Mountaineer Owner Guide : ( 22.5 U.S. gallons )
( 6 ) if you have the 4.0 liter SOHC , V6 engine and ( 8 ) if you have the 5.0 liter , V8 engine
Two.
According to the 2007 Mercury Mountaineer Owner Guide : ( there are 5 lug nuts per wheel )
The 1999 Mercury Mountaineer typically requires about 3.5 to 4.0 pounds of refrigerant, specifically R-134a, for its air conditioning system. However, it's always best to check the vehicle's specifications or the service manual for the exact amount, as there can be variations depending on the specific model and any modifications.
22.5 gallons
4
According to the 2000 Mercury Mountaineer Owner Guide : ( the gas tank holds 21.0 U.S. gallons )