RADIATOR HOSE TEES

If you are doing an engine swap, and want to run a pressurized expansion tank, the above tees can help.

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.

If you had a plastic or nylon hose tee fail, the brass or aluminum tees will prevent future failures.

Many of the tees are now made of cnc machined aluminum.  For example, a 5/8" x 1/4" tee is an aluminum part with a 1/8 npt thread, and a 1/4" x 1/8npt  brass tube fitting is screwed into the alumimun, similar to the LS1 Steam Vent Tee, #LS1-tee but with only one fitting.

If you need a size that is not listed, let us know, we can probably provide it.

3/16" x 3/16"

1/4" x 1/4"

3/8" x (1/4" or 3/8")

1/2" x 1/2", 1/2" x 5/8"

5/8" x (1/4" or 5/16" or 3/8" or 5/8"), 5/8 x 1/8 npt, 1/4 npt, 5/8 x 3/4"

3/4" x (1/4" or 5/16" or 3/8" or 3/4" ), 3/4" x 3/8 npt

7/8" x (1/4" or 5/16" or 3/8") or 7/8" x 1/8 npt

1" x (1/4" or 5/16" or 3/8"), 1" x  1/8 npt, 1/4 npt, 3/8 npt

1-1/8" x (1/4" or 5/16" or 3/8" or 5/8" or 3/4")

1-3/16" x (1/4" or 5/16" or 3/8" or 5/8" or 3/4")

1-1/4" x (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" or 7/8"), 1-1/4 x 14mm x 1.5P (for BMW E36 water temp fan switch)

1-1/4 x 22mm x 1.5p (for Volvo, Saab, Volkswagon water temp fan switch) 

(1-1/4" x 5/8" is popular for replacing the failure-prone plastic tee on the radiator hoses of 2002 through 2011 Saab 9-3, Aero)

1993-1996 Corvette LT1 1-1/4 x 1/2", see photograph below.

1-5/16" x (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" ), 1-5/16 x 14mm x 1.5P (for BMW E36 water temp fan switch)

1-3/8" x  (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" )

1-1/2" x (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" ), 1-1/2" x 3/8 npt, 1-1/2 x 14mm x 1.5P (for BMW E36 water temp fan switch)

1-9/16 x (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" ), 1-9/16 x 14mm x 1.5P (for BMW E36 water temp fan switch)

1-5/8" x (5/8" or 3/4")

1-3/4" x (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" ), 1-3/4 x 14mm x 1.5P (for BMW E36 water temp fan switch)

1-7/8" x  (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" or 1" or 1-1/8" )

2" x  (1/4" or 5/16" or 3/8" or 1/2" or 5/8" or 3/4" ), 2" x 14mm x 1.5P (for BMW E36 water temp fan switch)

For Chevrolet Duramax diesel trucks with te'ed hoses, we make 1-7/8" x 5/8"  and 1-7/8" x 1-1/8" hose tees. Some people like to replace the plastic tees with the brass tees for better reliability in extreme climates and conditions.

If you need transitional hose tees, see this link:Transitional Hose Tees

While many people assume that most radiator hose fittings are 1-1/4" or 1-1/2", the actual sizes are usually 1-5/16" or 1-9/16". We do make hose fittings in the 1-5/16 and 1-9/16 sizes for the perfect fit.

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.

Range Rover Discovery, Aluminum replacement hose tee with Brass Bleeder screw.

This uses a 1-1/4" x 1-1/4" hose tee, with a 10mm x 1.0P brass bleeder screw, as shown below.

This part is $48. Price includes shipping

Saab 9-3, Aero, aluminum replacement hose tee.

This typically uses a 1-1/4" x 1/2" hose tee

Porsche Cayenne Turbo aluminum replacement hose tee

This typically uses the 3/4" x 3/4" and a 1" x 3/4" hose tee.

Corvette LT1 aluminum replacement tee.

In the photograph below, are several 1-1/4" x 1/2" hose tees.

The lower tee is the stock steel tee used on the 1992-1996 Corvettes, which is no longer available from Chevrolet. The middle tee is an aluminum replacement that we make specifically for the Corvette, it is longer than the standard 1-1/4 x 1/2 hose tee, shown on top.

LT1/LSx 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 will form, and the cylinder heads will 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 1-5/16" x  3/8" tee, which is installed in the upper radiator hose.

Many people like to install the steam vent tube into the heater hoses, and we have the proper sizes for most heater hoses.

H-Pipe

H pipes, or coolant H-pipes can be made by using two hose tees with 1/8 npt fittings, and using a 1/8 npt hose nipple to attach the two.

Most common sizes are 5/8" x 3/4" which can be made using  a 5/8 x 1/8 npt  hose tee and a 3/4" x 1/8 npt hose tee as shown below.

last updated 03/27/17