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Normally no.
First off the 4.7L uses a timing chain, not a belt. Second, it could bend valves if the chain breaks.
Did a lot of timing chain jobs on the Pontiacs back in the day, don't remember any of them bending valves.
The 2000-2001 Infiniti I30 engine (vq 30 de) has a timing chain. There is no scheduled maintenance for the chain as it does not require periodic adjustment. These timing chains are purported to last around 300,000 miles. Also these engines are not interference engines. They do no internal damage if timing chain breaks.
The 2008 Infiniti G37 has a timing CHAIN Helpfull
Damage is only done if the motor is an "interference" design. ie the valves and the pistons overlap in the same place, only kept from colliding by the timing chain. When the timing chain breaks on a interference design, valves and pistons smash together. If it's not an interference design, the pistons and valve won't come into contact if the timing chain breaks, so odds are no internal damage done.
It has a chain ...
The Simple answer is yes the piston its the valves and possibly damage the pistons
This does depend on the engine design itself. If it is known as an interferance engine, then it is possible that the pistons can hit the valves if the chain breaks in operation.
Unfortunately yes. The Saturn motor is considered an Interference motor. When the chain breaks the neutral landing position of the camshafts will allow valves to be open, as the engine slows down from its rotating mass it will bend these open valves.
It must have a timing chain . The Gates website does not list a timing belt for the 2003 Infiniti G35
The 3.5 litre V6 engine in a 2003 Infiniti G35 has a timing CHAIN