1876
A 2009 Dodge Caliber has a timing chain.
You need to have a gunsmith measure out the bore and cylinder.
The Dodge Caliber 2.4L has two thermostats. They are in the plastic housing on the driver side end of the cylinder head.
You will need to take it to a gunsmith to find out.
Parts of the weapon.
What markings are present on the revolvoer? Is it a top break or does the cylinder swing out for loading? on top by the cylinder there is a hinge, the tip of the barrel swings upwards
Best course of action is to take it to a gunsmith.
Consult with a good gunsmith.
There are two in the plastic housing on the driver side end of the cylinder head.
The 5-shot cylinder leads to the assumption of .38 S&W caliber, but that is just an assumption.
There are two thermostats. They are in the plastic housing on the driver side end of the cylinder head.
There are two. They are under the plastic housing on the driver side end of the cylinder head.