Brake Prop Valve Help

[nigs]

Sup y'all,
has anyone had prop valves constantly let go on them?
Recently stuck a 96' spec ITR Booster + MC into car with Wilwood calipers.
The stock 30/40 Prop valve shit it self, right where that black rubber seal is.

Got a nice 40/40 from a 98 DC2 and BAM! Leaking from seal again after a hill climb.
It was fine after install, checked all the lines prior to the run. No leaks anywhere, brakes were awesome. No pedal slowly sinks >_<!

Any ideas?
Cheers.

[xclusive_eg8]

common sense would say the pressure is to much for prop valve, have you tried a dc2r prop valve?? might be made more inline with the MC

[90LAN]

no it should of been able to handle it
just got unlucky

[IEVAQ8]

i have both 98 spec itr and ek9 prop valve available if u need

[dorikin]

same thing happened to my 30/40 prop valve after upgrading to DC2 brakes.. just replaced it with 40/40 and 15/16 bmc, hopefully this holds up

[mocchi]

Sup y'all,
has anyone had prop valves constantly let go on them?
Recently stuck a 96' spec ITR Booster + MC into car with Wilwood calipers.
The stock 30/40 Prop valve shit it self, right where that black rubber seal is.

Got a nice 40/40 from a 98 DC2 and BAM! Leaking from seal again after a hill climb.
It was fine after install, checked all the lines prior to the run. No leaks anywhere, brakes were awesome. No pedal slowly sinks >_<!

Any ideas?
Cheers.

what do you mean shit itself? if its leaking, jsut replace the rubber seal?
http://i516.photobucket.com/albums/u323/breadbaconncheese/P1020171.jpg

[dorikin]

He's probably referring to the little black rubber cap on the outside.

[nigs]

yeap, that black rubber on the outside. it's leaking

i'll get pictures today.

[89lude]

happened to me too i got spoon brakes

its coming out of here hey nigs when you get on the pedal it starts leaking out of the arrow
http://i405.photobucket.com/albums/pp136/divads_87/propvalve3iy.jpg

[trism]

I got your pm, figured I'd just reply here.

Its because the brake fluid is doing more work. The bigger brakes have more piston area, so there is more brake fluid being moved, at a higher pressure, and it's becoming too much for the prop valve

Sent from my custard cannon like Peter North.

[nigs]

PICTURES!
http://i69.photobucket.com/albums/i55/vteclol/new%20egg/propgay.jpg

Ok I figured as much trism.
Any solutions?!
I found this on Honda tech but I'm not getting what he's saying. :(
http://www.honda-tech.com/showthread.php?p=40929088

I really don't want to grab another 40/40 and go through the effort of fitting then POP!

[dorikin]

he's saying/asking if it's possible to block that hole (relief valve) so it stops leaking but I don't think anyone was able to help him with that
so then he had a thread tapped and a stud put in without success.. still leaked

what size is your BMC? 96 ITR is 15/16 if im not mistaken?
I believe the reason mine leaked was due to the undersized bmc+booster

[nigs]

i've seen this happen 3 times in the entire time I've done my own work and working at the dealer. There is no detailed description, but i know if there is no master cylinder pushrod clearance which should be 0.0mm if i remember correctly (booster pushrod is either too close or touching the master cylinder pushrod) that is when i found the 3 prop valves with their rubber caps off and leaking fluid. Without a description, i would presume that the rubber is there to let you know that if it ever came off there is a lack of clearance between the 2.

[mocchi]

any updates? nigs/dorikin
im about to buy new 4040 and reset bmc as per manual

is your prop valve still leaking?

[dorikin]

my 40/40 is holding up

I agree with what trism said, you have to match your bmc up with your calipers otherwise you put too much pressure on the prop valve.

[mocchi]

my 40/40 is holding up

I agree with what trism said, you have to match your bmc up with your calipers otherwise you put too much pressure on the prop valve.

so you have 4040, 15/16 and 262mm?
or 1" with 282?

[dorikin]

4040 Prop valve DC2/4

15/16" BMC+booster EK4

262mm Brakes from DC2

Before I was running stock EG BMC and prop with the upgraded 262mm brakes and it was way too spongey, pedal went all the way to the floor.

If you're running 282mm brakes, definitely recommend 1" BMC

[mocchi]

4040 Prop valve DC2/4

15/16" BMC+booster EK4

262mm Brakes from DC2

Before I was running stock EG BMC and prop with the upgraded 262mm brakes and it was way too spongey, pedal went all the way to the floor.

If you're running 282mm brakes, definitely recommend 1" BMC

yeah i have 1", using 262mm now.
gonna use new 4040, reset bmc and use 282mm
will report back in few months

[trism]

Just remember, rotor size doesn't make a difference.

Its all about the caliper.

[mocchi]

Just remember, rotor size doesn't make a difference.

Its all about the caliper.

yes was talking about caliper.
shouldve been more clear.

[trism]

;)

Jdm d15b you wouldn't understand

[nigs]

only weeps a bit now.
I do drive like a girl these days though.

[mocchi]

fyi, oem pn for prop valve 4040 non abs is 46210-st7-003
rhd/lhd cars dont make a difference so its cheaper to buy bnib from us

[trism]

Interdasting.

[mocchi]

bamp.

new prop valve with 282 calipers, 1" bmc.
holds up nicely no leaks at all.
did few hard brakes and checked no weeps.

2 months now.

if you got extra $100, better to buy new pv.

[89lude]

mocchi are you selling 4040?

[mocchi]

mocchi are you selling 4040?

no i dont man sorry.
i bought mine new from honda 46210-st7-003
was around 170 shipped.

[89lude]

bummer all good.