RADIATOR HOSE TEES

If you are using an engine which has only one heater hose fitting, and a radiator which does not have a fitting for a heater hose, a hose Tee can be used in the lower radiator hose for the heater hose return line.

Stealth Conversions has brass hose tees, ranging from 1" x 3/8" to 1-3/4" x 3/4. The most common tees for swaps are 1.25" x 3/4", or 1.50" x 3/4".

When using the tee for a heater hose, do not install the Tee into the upper radiator hose because the coolant will go through the radiator, bypassing the thermostat, and preventing the engine from warming up.

LT1 Steam Vent Tee

The LT1 engines use a reverse flow cooling system, and the rear of the cylinder heads have vent tubes to purge any steam pockets that form during engine operation. Without the vent tube, steam pockets would form, and the cylinder heads would get localized hot spots that could damage the cylinder heads. The reason to install the vent tube into the upper radiator hose is so that you don’t need a radiator with a special fitting for the vent tube.

The tee that is typically used for an LT1 engine is the 1.25" x .38" tee, which is installed in the upper radiator hose.