The BMW M44 engine uses a chain to drive the two overhead camshafts. You can see a good illustration at http://www.realoem.com.
chain
Chain
The 3.3L engine has a timing chain.
The 4.3 liter V6 engine in a 1997 Chevy Blazer has a timing CHAIN
On a 1997 Chevrolet Malibu : Both the 2.4 litre four cylinder engine and the 3.1 litre V6 engine have a timing CHAIN
1-3-4-2 #1 being at the cambelt end of the engine.
it has timing chain
The 3.8L engine has a timing chain.
The GM 3.8 litre V6 engine has a timing CHAIN
yes they have a belt because ford stopped making chains in 1997 with the escort I have a Mk 6 55 plate t280 and that has a cam chain
In a 1997 Ford Thunderbird the 3.8 liter V6 engine has a timing CHAIN
The timing chain should last the life of the engine and not maintenance is normally required. It is replaced when the engine is rebuilt.