Blow off valve is not...blowing off... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Avante · 04-08-2008, 06:55 PM

Well, I recently purchased a sard r2d2, and decided to put the mofo in last night.

I took off my stock bov, and replaced it with the sard unit.

The problem is, now the sard unit doesnt blow...off. The car is running like there is no bov at all, even on light throttle you can hear the compressor surge tearing apart my turbo. i love it.

i double checked all connections, and made sure the vaccum line was sucking, and it was. I adjusted the screw at the top of the unit, and it did nothing. there is suction, but the diaphram does not move at all. i tried pushing the diaphram manually, but i couldnt get it to move.

what could be the problem?

any input or advice would be greatly appreciated!

96Turbo · 04-08-2008, 06:56 PM

you gotta release spring tension until it can actually open up upon vacuum (from the manifold). As loose as possible without leaking while in boost

180sx_Drifter · 04-08-2008, 06:57 PM

where did you hook it up to? pics would help.

Avante · 04-08-2008, 07:05 PM

pictuars...

will do.

the spring tension adjustment is on the top of the bov, no? if so, i took it all the way loose, and still no cigar.

mRclARK1 · 04-08-2008, 08:25 PM

Never seen one of those in person before so I have no idea on the design, but on piston operated valves they often get gunked and need a good cleaning and oiling to get them working tip top. Sometimes, they'll stop opening completely.

This is assuming you bought it used of course.

garagelu · 04-08-2008, 08:33 PM

My sard r2d2 did the same thing when I bought it. I bought it brand new and wouldnt blow off. What I did was I disassembled everything. Took the piston out and checked everything. Didnt even oil it up or anything. Once I got it put back together and installed, it started working. You may want to put a thin film of oil but thats up to you. BTW, my favorite bov by far.

***S14DB*** · 04-08-2008, 08:50 PM

I found I had to stick my thumb in the input and push it once all the way in to break it in. Then it worked fine.

zaneithan · 04-08-2008, 08:58 PM

had to take mine apart too to get it to work

Avante · 04-08-2008, 10:56 PM

sounds like taking it apart will have to be the route i will take. i will try and open the diaphram manually, if thats not working, then i will take apart the unit and just reassemble it.

the bov is brand new, so im guessing this is the correct measure.

thanks, zilvia!

jspaeth · 04-08-2008, 10:58 PM

Shudda gone with the C-3PO.

Easier to work with, and easier to understand

onesicklambo · 04-08-2008, 11:05 PM

^ LOL HAHAHAH. I took mine apart too and oiled the bish up and it worked. I love my r2d2 hes so cute.

Avante · 04-09-2008, 09:03 PM

took the bitch apart and lubed it up. it works!

still experiencing some comp surge, though, mostly low rpm, mid throttle.

at high rpm high throttle i can hear a quick chirping sound, right before the blow off. i'm guessing that it is also comp surge.

question is, will the surge thing pass, after the spring gets worn in?

or is it supposed to do that?

haha.

zaneithan · 04-09-2008, 09:05 PM

mine still has a small bit of compressor surge before blowing off too but i havent really messed with the spring much since setting it to where its at, try playing with it, i dont think a little bit of compressor surge will be very harmful to the turbo though

spool_sample · 04-09-2008, 09:25 PM

Quote:

Originally Posted by Avante

took the bitch apart and lubed it up. it works!

still experiencing some comp surge, though, mostly low rpm, mid throttle.

at high rpm high throttle i can hear a quick chirping sound, right before the blow off. i'm guessing that it is also comp surge.

question is, will the surge thing pass, after the spring gets worn in?

or is it supposed to do that?

haha.

It's normal.

Boosted240Guy · 04-15-2008, 11:16 AM

Yea I have a SARD R2D2 as well. I bought it new and it did the same thing, it wouldn't open....So I put my thumb up in and pushed it up and started to work okay. When it was cold though it would not open and I would have to get out and unscrew it and push it in again I guess to try and break it in. Eventually I got pist off and took it back to the shop I got it at, they lubed it all up and it worked alright. This is by far my favorite blow off valve, the sound it makes is one of a kind. I have not taken it apart yet but I might try that, like I said it does work but almost seems like it either stays open too long or doesn't stay open long enough when it does go off. It works better when it is warm outside. Maybe it just takes a while to break it in, although I've had mine since October 07

zaneithan · 04-15-2008, 11:21 AM

mine is usually still bitchy on cold mornings...it takes a few good pulls to get it to open up regularly, but when it does it works fine

04-08-2008, 06:55 PM	#1
Avante Zilvia Addict Join Date: Jul 2005 Location: San Diego Posts: 705 Trader Rating: (12) Rides Gallery: Avante Feedback Score: 12 reviews	Blow off valve is not...blowing off... Well, I recently purchased a sard r2d2, and decided to put the mofo in last night. I took off my stock bov, and replaced it with the sard unit. The problem is, now the sard unit doesnt blow...off. The car is running like there is no bov at all, even on light throttle you can hear the compressor surge tearing apart my turbo. i love it. i double checked all connections, and made sure the vaccum line was sucking, and it was. I adjusted the screw at the top of the unit, and it did nothing. there is suction, but the diaphram does not move at all. i tried pushing the diaphram manually, but i couldnt get it to move. what could be the problem? any input or advice would be greatly appreciated! __________________ www.vertex-usa.com www.pandagarage.com

04-08-2008, 06:57 PM	#3
180sx_Drifter Zilvia Junkie Join Date: Jan 2008 Location: SoCal Posts: 557 Trader Rating: (1) Rides Gallery: 180sx_Drifter Feedback Score: 1 reviews	where did you hook it up to? pics would help. __________________

04-08-2008, 07:05 PM	#4
Avante Zilvia Addict Join Date: Jul 2005 Location: San Diego Posts: 705 Trader Rating: (12) Rides Gallery: Avante Feedback Score: 12 reviews	pictuars... will do. the spring tension adjustment is on the top of the bov, no? if so, i took it all the way loose, and still no cigar. __________________ www.vertex-usa.com www.pandagarage.com

04-08-2008, 08:25 PM	#5
mRclARK1 Post Whore! Join Date: Sep 2005 Location: Location? Posts: 4,205 Trader Rating: (0) Feedback Score: 0 reviews	Never seen one of those in person before so I have no idea on the design, but on piston operated valves they often get gunked and need a good cleaning and oiling to get them working tip top. Sometimes, they'll stop opening completely. This is assuming you bought it used of course. __________________

04-08-2008, 08:50 PM	#7
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	I found I had to stick my thumb in the input and push it once all the way in to break it in. Then it worked fine. __________________ Comments should be taken as Opinions not as Statements of Fact

04-08-2008, 06:56 PM	#2
96Turbo Zilvia FREAK! Join Date: Nov 2007 Location: AZ Age: 36 Posts: 1,315 Trader Rating: (11) Feedback Score: 11 reviews	you gotta release spring tension until it can actually open up upon vacuum (from the manifold). As loose as possible without leaking while in boost

04-08-2008, 08:33 PM	#6
garagelu Nissanaholic! Join Date: Aug 2005 Location: Atlanta, GA Age: 40 Posts: 1,856 Trader Rating: (60) Feedback Score: 60 reviews	My sard r2d2 did the same thing when I bought it. I bought it brand new and wouldnt blow off. What I did was I disassembled everything. Took the piston out and checked everything. Didnt even oil it up or anything. Once I got it put back together and installed, it started working. You may want to put a thin film of oil but thats up to you. BTW, my favorite bov by far.

04-08-2008, 08:58 PM	#8
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 40 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	had to take mine apart too to get it to work __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)

04-08-2008, 10:56 PM	#9
Avante Zilvia Addict Join Date: Jul 2005 Location: San Diego Posts: 705 Trader Rating: (12) Rides Gallery: Avante Feedback Score: 12 reviews	sounds like taking it apart will have to be the route i will take. i will try and open the diaphram manually, if thats not working, then i will take apart the unit and just reassemble it. the bov is brand new, so im guessing this is the correct measure. thanks, zilvia! __________________ www.vertex-usa.com www.pandagarage.com

04-08-2008, 10:58 PM	#10
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Shudda gone with the C-3PO. Easier to work with, and easier to understand __________________ Daily driven

04-08-2008, 11:05 PM	#11
onesicklambo Leaky Injector Join Date: Sep 2006 Location: norcal Age: 38 Posts: 110 Trader Rating: (0) Feedback Score: 0 reviews	^ LOL HAHAHAH. I took mine apart too and oiled the bish up and it worked. I love my r2d2 hes so cute.

04-09-2008, 09:03 PM	#12
Avante Zilvia Addict Join Date: Jul 2005 Location: San Diego Posts: 705 Trader Rating: (12) Rides Gallery: Avante Feedback Score: 12 reviews	took the bitch apart and lubed it up. it works! still experiencing some comp surge, though, mostly low rpm, mid throttle. at high rpm high throttle i can hear a quick chirping sound, right before the blow off. i'm guessing that it is also comp surge. question is, will the surge thing pass, after the spring gets worn in? or is it supposed to do that? haha. __________________ www.vertex-usa.com www.pandagarage.com

04-09-2008, 09:05 PM	#13
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 40 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	mine still has a small bit of compressor surge before blowing off too but i havent really messed with the spring much since setting it to where its at, try playing with it, i dont think a little bit of compressor surge will be very harmful to the turbo though __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)

04-15-2008, 11:16 AM	#15
Boosted240Guy Join Date: Oct 2007 Location: Colorado Age: 37 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	Yea I have a SARD R2D2 as well. I bought it new and it did the same thing, it wouldn't open....So I put my thumb up in and pushed it up and started to work okay. When it was cold though it would not open and I would have to get out and unscrew it and push it in again I guess to try and break it in. Eventually I got pist off and took it back to the shop I got it at, they lubed it all up and it worked alright. This is by far my favorite blow off valve, the sound it makes is one of a kind. I have not taken it apart yet but I might try that, like I said it does work but almost seems like it either stays open too long or doesn't stay open long enough when it does go off. It works better when it is warm outside. Maybe it just takes a while to break it in, although I've had mine since October 07

04-15-2008, 11:21 AM	#16
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 40 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	mine is usually still bitchy on cold mornings...it takes a few good pulls to get it to open up regularly, but when it does it works fine __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)