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DIY Clutch Delay valve Removal

Mikex18

Well-Known Member
650
824
Quebec.. yes we speak english in quebec
Vehicle Model
Civic SI
Body Style
Sedan
For the one who drive their car hard, you must have noticed that when you shift hard the clutch has a tendency to ''slip'' just a bit!! Thats because of the Clutch delay valve in the slave cylinder, its there to prevent transmission component damage due to slowly releasing the pressure in the slave, but make the clutch wear faster!!!

Taking it off will result in a :
-Bit stiffer clutch
-better clutch response
-no more clutch slipping


First of all you need to take off your airbox/cai/sri in to be able to reach the slave cylinder and clutch hose easily!!



Then you need to take off the slave cylinder on the transmission! There is two(2) 12mm bolt and you need a 10mm key for the clutch hose!!




Once the slave is off, the is a ''C'' clip to take off. This thing is a pain in the *** to take off. Most of the time, its stuck in corrosion!

You need some really sharp screwdriver like theses:
**Be carefull with those picks, one of my finger didnt like when the pick went through it!!



To make the ''C'' clip removal a bit easier, take a punch and a hammer and hit on the little cap to unstick iit from the corosion




With a set of long nose pliers, take the little cap off!!


Once done, you will have a few parts in hand, the delay valve (little white thing), the filter (the little black thing, which is IN the delay valve by the way)

You throw the white and black thing to the garbage!!


Put back the cap, be carefull with the O-ring, and put back the ''C'' clip!!

Re-install on the tranny with the 12mm bolt, reconnect the hose(10mm key)!


Once re-installed you will need to bleed the clutch, 8mm key on the bleeder! You will need a friend to help bleeding it, one to pump the clutch and one to open the bleeder! Repeat until there is no more air, always look for the oïl level in the Clutch master cylinder! If you know how to bleed brakes, you will be fine bleeding a clutch!!

If you dont do this step correctly, it will result in shifting problem, and prematurate clutch wearing!!




After its all done, road test!!!


Its been done since a week on my car, and WOW muuuccchhh MUUUCCCHHHHH better!!


I hope its all clear, if you have any question pm me, ill help the better i can!!!


**Sorry for the mistakes, im french, and i try my best** :D :D
 
Last edited:

Dar-Dar

Mordorator
19,329
9,901
North NJ
Vehicle Model
Civic Si
Body Style
Fiji Blue Pearl Coupe Coolest Member Since: May 15, 2011
You'll probably notice a much bigger difference if you ad a Dot4 brake fluid in your cmc and installing a stainless steel clutch line. :D

Nice DIY.
 

Dar-Dar

Mordorator
19,329
9,901
North NJ
Vehicle Model
Civic Si
Body Style
Fiji Blue Pearl Coupe Coolest Member Since: May 15, 2011
I need to buy a ss line for my clutch, MTEC springs, and probably this diy. Do you know any possible downside to this?
 

Mikex18

Well-Known Member
650
824
Quebec.. yes we speak english in quebec
Vehicle Model
Civic SI
Body Style
Sedan
The old Bseries and Dserie didnt have this, if you always powershift and always shift like its was the last **** you would do, tranny will break like old B-D did!!


When you release the clutch hard, it kicks hard in the diff, axles, gears ect
 

Bulkybear

Well-Known Member
1,665
749
I wonder if this mod could help my launch at the track. Maybe my wheelspin I felt was actually clutch slip. Hmmm.
From your video I would guess no. Didnt seem to slip in other gears after launch. Even so a cdv isn't going to delay the release of the pedal that much. Still I've been thinking about doing this also. Mainly to reduce clutch wear from slipping.
 

njhustler

Well-Known Member
385
165
New Jersey
Vehicle Model
Civic Si
Body Style
Sedan
My second run had what I thought was wheelslip , so I feathered the throttle a bit. Thinking about it now it might be clutch slippage. The first run wasnt too bad.
 

Bulkybear

Well-Known Member
1,665
749
Trust me it shouldn't be clutch slip. If so you would smell it. And unless your over I'd guess around 300 whp or have just melted your clutch over time it won't slip. At least mine doesn't.
 
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