Matt's 521

[thisismatt]

 

 

 

Not 521 (1200 actually), but similar enough

 

 

My life is kind of a shambles right now, so nothing to report on the 521 except that every time I let it sit for a while the brakes lose pressure 🤦‍♂️

Edited April 18, 2022 by thisismatt

[Stoffregen Motorsports]

Install a 2 psi residual valve in the brake line. It will keep the wheel cylinders slightly pressurized so the lip seals are pushed tight against the pistons, not allowing them to relax and suck air. I read about this many years ago and tried it on my 320 pickup and it worked.

[thisismatt]

4 hours ago, Stoffregen Motorsports said:

Install a 2 psi residual valve in the brake line. It will keep the wheel cylinders slightly pressurized so the lip seals are pushed tight against the pistons, not allowing them to relax and suck air. I read about this many years ago and tried it on my 320 pickup and it worked.

 

But why do that when I can just do a four wheel brake bleed every few months?! 😂😬😭

[Stoffregen Motorsports]

I know you're kidding, but here's an answer that might satisfy you. When wheel cylinders suck air, they also suck moisture which can pollute the wheels cylinders and start corrosion, which will eventually gunk up inside the cylinder and cause them to fail.

[thisismatt]

1 hour ago, Stoffregen Motorsports said:

I know you're kidding, but here's an answer that might satisfy you. When wheel cylinders suck air, they also suck moisture which can pollute the wheels cylinders and start corrosion, which will eventually gunk up inside the cylinder and cause them to fail.

 

Yeah, was joking, but also hard to work on it right now. Are there piggyback residual valves with the correct fittings to drop right in, or is flaring at least one new tube always required?

[Stoffregen Motorsports]

I don't know. I have only used the in-line valves. They tuck nicely up next to a frame rail.

 

Sounds like you've got bigger fish to fry right now anyway. I completely understand.

[thisismatt]

Seems to have only been the master, as I bled the driver front and got back to a rock hard pedal 🤷‍♂️

[d.p]

52 minutes ago, thisismatt said:

Seems to have only been the master, as I bled the driver front and got back to a rock hard pedal 🤷‍♂️

Way to go! Lol. 

[thisismatt]

2 minutes ago, d.p said:

Way to go! Lol. 

I know, pretty big accomplishment. Gold star

[d.p]

Haha. Man after I posted that witty retort I happened to look and see when you started this thread in 2011……wow.   
 

 

[thisismatt]

17 hours ago, d.p said:

Haha. Man after I posted that witty retort I happened to look and see when you started this thread in 2011……wow.   
 

 

Yep, I have my excuses but whatever. fml