So after a few months on my ebay Greddy type-s replica if failed. The bov didn’t open on low boost. So I tried a smaller spring then half spring, but no luck. So I was messing around with it and found out that the diaphragm was shot. Air was leaking causing the bov not to open when you shift gear. So I then took it apart.

Here's the diaphragm


Cracks it had


I went and bought some rubber repair but it didn’t work... So I was thinking and thinking. The replacement one ranges from $60-$80 online. So I decided why not make my own diaphragm. I went and bought a bike inner tube and cut it to match. MAKE SURE YOU CUT IT SLIGHTLY BIGGER SO IT CAN HAVE ROOM FOR PLAY CAUSE BY THE MOVEMENT OF THE PISTON.

My replacement


All cut up and installed


I used a needle nose plier to hold the piston stem from moving as I took off the 8mm nut holding the assembly in place. I used a soldering iron to burn my some holes for the screws. Then reassemble and install.

Installed


I tested it out and the diaphragm has no leaks... I’m putting the old stock single spring back in. So far it opens up and no compression surge Save me from buying a new bov. I not sure how long this will work but as long as it holds until I upgrade to a tial in the summer I’m happy.




Modified by blue_hatch at 7:03 PM 2/25/2008

 

I'll update you guys how the stock single spring runs tomorrow when I take it out for some action


Modified by blue_hatch at 10:12 PM 2/25/2008

 

for DiY !

 

nice

 

bump for that ratty *** IC pipe and for DIY! lol.

 

Thats actually a great idea! The bike tube is meant to hold lots of pressure anyways, and in most cases its cheaper to buy a used Type-S. Greddy diaphragms cost >$80.

 

let us know how it works. if it works good than ill know what to do when my diaphram goes bad. thanks for the great idea.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civic89stdB16 &raquo;</TD></TR><TR><TD CLASS="quote">let us know how it works. if it works good than ill know what to do when my diaphram goes bad. thanks for the great idea.</TD></TR></TABLE>
Works good so far, im still having a little flutter right before the piston opens up. Im going to try a softer spring and see if that helps

 

Nice work This will help many people later on if they come across this problem.........

 

I just did this and i was amazed that it worked! DIY ftw

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by youdontneed2cams &raquo;</TD></TR><TR><TD CLASS="quote">I just did this and i was amazed that it worked! DIY ftw</TD></TR></TABLE>
glad to hear

 

you're the man!! my bov started leaking a couple of days ago and I was looking through for one for sale up here and I stumbled onto your thread. Just got finished with it and it worked like a charm. how's yours holding up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mercutio_07 &raquo;</TD></TR><TR><TD CLASS="quote">you're the man!! my bov started leaking a couple of days ago and I was looking through for one for sale up here and I stumbled onto your thread. Just got finished with it and it worked like a charm. how's yours holding up?</TD></TR></TABLE>
Working better since its been warmer lately. Glad it worked for you as well