The problem is that rear caliper pistons on many vehicles, including some Grand Caravans, rotate as they're pushed in. A simple push might not work and could damage the seals. You need a tool that can both push and rotate the piston simultaneously.
Here are the common solutions:
* Caliper Piston Compression Tool: This is the most common and recommended tool. It's specifically designed to compress and rotate the pistons, avoiding damage. You can find these at most auto parts stores (AutoZone, Advance Auto Parts, etc.) Look for one that is specifically designed to fit the piston size of your Grand Caravan.
* C-clamp with a square block of wood: This is a less ideal but sometimes workable solution if you're in a pinch. You'd use a properly sized C-clamp and place a square block of wood against the piston to distribute the force evenly and prevent damage. However, you still need to account for the rotation of the piston. Turning the piston as you push is crucial. This method is less controlled and prone to damaging the seal and causing it to leak.
* Brake Caliper Rewind Tool: This tool has a small gear or a claw that engages with the piston to rotate it as it compresses. It is usually simpler to use and better controls the process compared to a C-clamp and wood.
Before you start:
* Consult a repair manual: A repair manual specific to your 2008 Dodge Grand Caravan will provide detailed instructions and diagrams, making the job much easier and safer.
* Properly support the vehicle: Use jack stands to safely lift and support the vehicle. Never work under a vehicle supported only by a jack.
* Wear safety glasses: Brake fluid is corrosive.
In short, while you *could* try a makeshift solution, a dedicated caliper piston compression tool is the best and safest way to do this job correctly and avoid damaging your brake calipers. The cost of the tool is a small price to pay compared to the cost of replacing a damaged caliper.
