Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - Scion FRS / Subaru BRZ HPS Silicone Radiator Hose Kit DIY Installation Guide!

Hi Guys!

Check out this DIY made by HPS for the Scion FR-S and Subaru BRZ.
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HPS High Temperature Reinforced Silicone Radiator Hose kit installation instruction for the Scion FRS / Subaru BRZ
Here is a list of tools you will need:

10mm socket with ratchet
12mm socket with ratchet
8mm wrench
Flat Screw Driver
Philip screw driver (for the bleed screw)
Needle Nose Pliers
Safety Glasses & Gloves
Drain Pan
Coolant Bleeding Funnel

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Your first step is to put the car up on jack stand at its proper lift points. Then remove the aluminum under tray using a 10mm & 12mm socket. There are also some plastic clips which can be removed with a flat screw driver. By removing the under tray, you will have access to the lower radiator hose located on the driver side of the vehicle.

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Before you drain the coolant, make sure the vehicle is cooled down completely. To drain the coolant you can remove the plastic cover located on the passenger side of the vehicle. Once the cover is removed you can see the drain valve. I attached a piece of hose to the drain to make less of a mess.

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You can remove the radiator cap to speed up the drain process.

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The lower radiator hose is located behind the air intake box. The intake box is held on by 3 bolts. To remove the air intake box you must remove the 3 bolts using a 10mm wrench or socket. The next step is to unplug the sensor wire and loosen the intake tube using a flat screw driver.

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To remove the hose clamps, you simply pitch them using a pair of pliers. The hose should be pretty easy to remove on the radiator side. On the engine side the hose might be a little bit harder. I had to use a pick to break it lose.

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Lower radiator hose view from the top of the engine bay.

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Lower radiator hose view from the bottom once the alumium tray is removed

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On the upper radiator hose I decide to remove it as one piece to make the installation of the silicone radiator hose easier. To remove it as one piece. you have to unbolt the radiator hose filler using a 10mm wrench or socket.

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Once the hose is out, you can swap the radiator hose filler to the HPS reinforced silicone radiator hose and use the provide stainless steel clamps to secure it. Do not over tighten the clamps. (Recommended torque spec on the HPS stainless steel clamps are 35 inch lbs.)

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The upper hose on the radiator side is kinda tricky. Its in a bad angle so i had to use a swivel and a8mm socket to tight the clamp. You can also use a open 8mm wrench as well.

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Bolt the radiator hose filler back in place and double check the hose position to make sure the hose is not touching or kink.

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The lower radiator hose go on pretty easy and a flat screw driver can be use to tighten the clamps

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After the hoses are secure in place you can tighten the drain and begin filling the system back with coolant. Reinstall the intake air box and the under tray.

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Remove the screw using a philip screw driver on the heater hose located on the fire wall to bleed air out of the system. Continue to fill the coolant till it flows out of the bleed screw.

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Once its full, start the engine and turn the heater to the hottest temperature and set the fan to the lowest setting. Let the car idle and check for leaks. Once the car has reach operating temperature, turn the engine off and let the car cool down. Remove the funnel, top off the coolant system and put the radiator cap back on.

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Drive the car around and re-check the coolant level once the car has cooled down. Remember to take away safety precautions when working on your car and use safety gear such as safety glasses and gloves.
Scion FRS / Subaru BRZ HPS Silicone Radiator Hose Kit is available in Black, Blue and Red. (Part Number 57-1226)

Thanks,
Mike