* Clogs: Stop leak can clog radiator passages, heater cores, and even the water pump. This can lead to overheating and more expensive repairs down the line. A clogged system is far worse than a small leak.
* Damage to components: The chemicals in stop leak can be harsh and damage seals, hoses, and other parts of your cooling system.
* Ineffective for serious leaks: Stop leak is only a temporary fix for minor leaks. A significant leak requires proper repair, not a band-aid solution.
* Difficult to remove: If the stop leak doesn't work or creates further problems, it can be very difficult to completely flush out of your cooling system.
Instead of using stop leak, it's far better to:
* Identify the source of the leak: A mechanic can pinpoint the leak and provide a proper repair.
* Repair the leak: This might involve replacing a hose, fixing a cracked radiator, or repairing a gasket.
* Replace coolant: Always use the correct type and amount of coolant specified for your 1997 Pontiac Grand Am.
Stop leak should only be considered as a very last resort, and even then, you'll want to plan a proper repair as soon as possible. The temporary benefit is often outweighed by the potential for long-term damage.
