Coolant Bleeder Screw

obito

Well-Known Member
Joined
Jul 24, 2021
Messages
123
Reaction score
120
Location
DMV
Car(s)
3.0
Just installed the HPS screw. Noob question though, when I unscrewed the OEM version while the engine was cool, I heard a little hiss with a rush of air. I’m assuming that’s normal because it’s a pressurized or closed system?
 
OP
OP
Loco38SUP

Loco38SUP

Well-Known Member
Joined
Feb 17, 2021
Messages
1,086
Reaction score
1,540
Location
Seattle
Car(s)
2021 GR Supra 3.0 (Renaissance Red)
Just installed the HPS screw. Noob question though, when I unscrewed the OEM version while the engine was cool, I heard a little hiss with a rush of air. I’m assuming that’s normal because it’s a pressurized or closed system?
Its completely normal, mine did the same thing. It’s ok for a little of the residual pressure to bleed off when opened.

-RJM
 

Axix23

Well-Known Member
Joined
Nov 18, 2019
Messages
2,193
Reaction score
2,056
Location
GA
Car(s)
NA
Oh snap! Titanium coolant caps. 🙌🏼

-RJM
yeah, I was the one who begged them to make the coolant caps,
Bleeder screw , and also the oil cap. lol 😆


Got more stuff coming!! lol
 
OP
OP
Loco38SUP

Loco38SUP

Well-Known Member
Joined
Feb 17, 2021
Messages
1,086
Reaction score
1,540
Location
Seattle
Car(s)
2021 GR Supra 3.0 (Renaissance Red)
Is there even a chance with the stock one failing if it's never touched?
Yes, they have failed under normal driving conditions. The screw itself is flawed. They cored out the center of it just below the philips cross. And then they added a small notch along the threads. The wall sections in that area are thin.

The screw feels like its made of ginger bread, it weighs almost nothing.

-RJM

AB4D1E07-3683-460D-8B6F-8EBC15E68E78.jpeg

C123C4D2-74C8-4584-9BC2-430F15A43AE7.jpeg
 

Axix23

Well-Known Member
Joined
Nov 18, 2019
Messages
2,193
Reaction score
2,056
Location
GA
Car(s)
NA
Yes, they have failed under normal driving conditions. The screw itself is flawed. They cored out the center of it just below the philips cross. And then they added a small notch along the threads. The wall sections in that area are thin.

The screw feels like its made of ginger bread, it weighs almost nothing.

-RJM

AB4D1E07-3683-460D-8B6F-8EBC15E68E78.jpeg

C123C4D2-74C8-4584-9BC2-430F15A43AE7.jpeg
Do you have any photos of it failing. Some of my a90 Supra people don’t understand the point of it being replaced. I just like the bling! Lol
 

digicidal

Well-Known Member
Joined
Jan 13, 2020
Messages
613
Reaction score
711
Location
Las Vegas, NV
Car(s)
2020 Supra, 2020 RX350, 2007 4Runner
I think that the biggest issue will be that 90% of the failures will be at the worst possible time... when you actually needed to remove it and it simply disintegrates in the bung. Not sure how often that occurs and what factors are relevant - but I know here in the desert, anything plastic will eventually fail. The thinner it is the faster it will fail.
 

afree

Member
Joined
Aug 12, 2021
Messages
7
Reaction score
6
Location
Melbourne, FL
Car(s)
2020 Supra
I'd be concerned with galvanic corrosion with the brass female threads and Ti bleeder screw.
 
Advertisement

 
Advertisement
Top