RIGHT FRONT BLAKE SCORIATED

[Nex]

After I received your message, I took the truck out for a spin in 4A. Because I previously indicated the noise is intermittent, I will not bet my life on it, but it did not occur in 4A.
1. What is an IWE check valve?
2. What function does it perform?
3. Is the Ford Dealer the best option to replace it?
4. Any idea about the cost?

Thank you in advance to taking the Tim to respond!!

 

[Reaper308]

Sounds like the IWE system. When you talk about Drilled and slotted or any combination of the two there are pros and cons to both I personally have drilled and slotted R1 rotors and have had no trouble with them in about 10,000 miles No vibration and I drive hard so make a decision that’s right for you but here is some reading material to help you educate yourself.

How to Choose Brake Rotors: Blank vs Drilled and Slotted vs Drilled

Brake rotors have different types. You must understand what sets them apart including the pros and cons of every style. Learn how to choose brake rotors here!

www.r1concepts.com

 

[K9 EXPERT]

doubt it’s the brakes. as i said it’s probably the iwe check valve. Does it make the noise in 4A?

I just checked YouTube and apparently it could also be the solenoid. The repair of the valve appears to be straightforward so an idiot like me can PROBABLY complete it. Is there a way to rule out the solenoid?

 

[K9 EXPERT]

I just watched it….MANY THANKS!

 

[K9 EXPERT]

Sounds like the IWE system. When you talk about Drilled and slotted or any combination of the two there are pros and cons to both I personally have drilled and slotted R1 rotors and have had no trouble with them in about 10,000 miles No vibration and I drive hard so make a decision that’s right for you but here is some reading material to help you educate yourself.

How to Choose Brake Rotors: Blank vs Drilled and Slotted vs Drilled

Brake rotors have different types. You must understand what sets them apart including the pros and cons of every style. Learn how to choose brake rotors here!

www.r1concepts.com

Due to my lack of knowledge, I think I will tell Schwab to put stock rotors on the vehicle. My thought process is, if it’s not causing the vibration of noise, why fix something that isn’t broken. Thank you for the material and your time.

 

[nikhsub1]

I just checked YouTube and apparently it could also be the solenoid. The repair of the valve appears to be straightforward so an idiot like me can PROBABLY complete it. Is there a way to rule out the solenoid?

Yeah - replace the valve then if you continue to have issues, it is likely the solenoid but the IWE check valve is a HUGE known issue and point of failure, luckily it is cheap and easy to change. I carry a new one in my truck at all times.

 

[Old-Raptor-guy]

At your place you inspect. What for leaks and…

Torn boots on the caliper piston, cracked pistons (the phenolic ones). Around here about 1 out of 5 vehicles has at least one slide pin that is siezed, many times it is the same price to do a caliper that comes with a bracket and slide pin hardware vs just a bracket (that doesn't come with slide pins and boots) pins and boots.

I would say we only replace about 1 out of 50 or calipers we work on. Again Les Shwab has a company policy that all calipers are to be replaced.

 

[EricM]

IWE for dummies- IWE is "Integrated Wheel End", meaning the disconnect from the drivetrain is at the wheel. The 4WD is always trying to engage due to the design, but there is vacuum that keeps it from doing so. When you engage 4WD, the vacuum is released, the IWE meshes and 4WD happens.

So having vacuum is critcal to not engaging the IWEs. Your engine makes vacuum at idle, but if you floor it, or if it's boosted- then you have no vaccum during boost. Therefore, Ford uses check valves and vacuum tank to maintain the vacuum to the IWEs during the periods when there is none.

If the check valves (or the lines going to the IWEs after the tank/valves) start to leak, then the IWEs lose vacuum and start to engage and you heard a grinding as the two parts start to mesh, but can't fully do so as there is still some vacuum preventing it.

Ford has run this exact same system since 2004 on all F150s. 97-2003 was more a robust setup that didn't fail, but it got worse MPG as more stuff was turning when not in 4WD, which is why Ford went to the IWEs.

 

[New recaros]

IWE for dummies- IWE is "Integrated Wheel End", meaning the disconnect from the drivetrain is at the wheel. The 4WD is always trying to engage due to the design, but there is vacuum that keeps it from doing so. When you engage 4WD, the vacuum is released, the IWE meshes and 4WD happens.

So having vacuum is critcal to not engaging the IWEs. Your engine makes vacuum at idle, but if you floor it, or if it's boosted- then you have no vaccum during boost. Therefore, Ford uses check valves and vacuum tank to maintain the vacuum to the IWEs during the periods when there is none.

If the check valves (or the lines going to the IWEs after the tank/valves) start to leak, then the IWEs lose vacuum and start to engage and you heard a grinding as the two parts start to mesh, but can't fully do so as there is still some vacuum preventing it.

Ford has run this exact same system since 2004 on all F150s. 97-2003 was more a robust setup that didn't fail, but it got worse MPG as more stuff was turning when not in 4WD, which is why Ford went to the IWEs.

Nice explanation

 

[nikhsub1]

ChatGPT ftw.