The two tank question....

The smaller one on the Pantera pre L and L models is called the "surge" or "swirl" tank and the longer tank which is a bit forward to further to the side is the overflow tank. Your 9311 might be different, but I doubt it.

Chuck Engles

The short tank is referred to in DeTomaso/Ford literature as the system tank, the pressure tank, and/or the supply tank. Take your pick.

The taller tank is referred to in DeTomaso literature as an expansion tank, which in the automotive sense is a pressurized coolant recovery tank.

The inlet & outlet of the short tank are configured as a functional de-gas tank (aka a swirl tank) except it has the cooling system’s pressure cap mounted on top instead of a continuous vent. In order for this tank to function as a de-gas tank it needs two things (1) replace the pressure cap with a continuous vent and (2) provide a header tank for it to vent into. A header tank is sometimes referred to as a surge tank. The Pantera has no header tank/surge tank as-is, but the taller tank can be easily converted into one by moving the connection of its bottom outlet from the system tank to the suction of the coolant pump.

-G

Ok so the shorter tank in a book I have is #5 and called the Supply Tank - but can also be called System, Pressure, Surge and/or Swirl Tank.

The taller tank is # 7 and called Expansion Tank but can also be called the Overflow Tank.

Got it....right?