Blown out diaphragms in one way check valves

3221 Views 7 Replies 5 Participants Last post by chadporsche997, Aug 25, 2010

chadporsche997

Discussion Starter · Aug 17, 2010

I was just wondering if anyone on here has had any issues with blowing out the diaphragms on the one way check valve's either the one by the fire wall running from the Throttle Body or the one way check valve running from the head? If so is there any solution such as a check valve that can handle more pressure with a stronger diaphragm that someone has came across? I have searched quite a few places and yet been able to find one. Or is there a more simple solution. I look forward to hearing some input on this as I am not having to replace these things on a daily or weekly basis or anything but if I could find a strong one that would last a long time and might even be able to take disassemble for cleaning that would be nice. Thanks for everyone's input in advance.
-Chad

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mvadenais

· #2 · Aug 17, 2010

I believe you can use a check valve off a 9-5

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DrewP

· #3 · Aug 17, 2010

mvadenais said:
I believe you can use a check valve off a 9-5

I may have to try that....

Best,
Drew

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chadporsche997

Discussion Starter · #4 · Aug 20, 2010

mvadenais said:
I believe you can use a check valve off a 9-5

Awesome! Thanks for the advice and I will definitely try that out! I am in the process of looking into purchasing at least one industrial inline check valve that is made to withstand higher pressures. The only thing about this is it is a larger size like around a 1/2" so my friend who has some machining tools is going to assist me in customizing it to accomodate the stock size, vacuum line, and make it barbed on both ends. This one I am entertaining the idea of making it to be a spring check valve so it can be easily replaced and will look much cleaner in the engine bay. Like I said this is just a though for now but I will keep everyone posted if things progress with this idea.
-Chad

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VI009DZ

· #5 · Aug 20, 2010

A check valve is a check valve....you can use one from a John Deere tractor if you had one.

I've never blown out the diaphragms on any check valve in any turbo vehicle I've owned...and I run approx. 20psi. on I4 and V6 cars. Are you running standard software on your Aero, or are you madly tuned (assume not, being 226hp and 259tq, but thought I'd ask). Ever blow one out on your Supra? Is it just a regular old check valve for doing stuff like preventing pressurizing of heater controls and stuff, or is it some huge check valve, like a blow-off valve setup??

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chadporsche997

Discussion Starter · #6 · Aug 22, 2010

VI009DZ said:
A check valve is a check valve....you can use one from a John Deere tractor if you had one.

I've never blown out the diaphragms on any check valve in any turbo vehicle I've owned...and I run approx. 20psi. on I4 and V6 cars. Are you running standard software on your Aero, or are you madly tuned (assume not, being 226hp and 259tq, but thought I'd ask). Ever blow one out on your Supra? Is it just a regular old check valve for doing stuff like preventing pressurizing of heater controls and stuff, or is it some huge check valve, like a blow-off valve setup??

Hey Adam,

Thanks for your input. I understand your philosophy regarding a check valve however I have seen one's with neoprene, fluorosilicone, Viton and a few other diaphragm's just to name a few. I have gone threw 3 or 4 of these check stock style check valves, the Scan Tech one's from e-euro. However at that point in time I was having some other issues with my Throttle body at that time as well which could have been causing the problem. I was just wondering what kind of diaphragm the stock or the scan tech had it in it and if there was a stronger one out there that someone was familiar with. My Aero is running the stock tune as the only mods that I have done are the following:
-Aerodyte 3" downpipe and full 3" exhaust
-slip on funnel air filter on stock piping for right now.
-Manual boost controller spiking at 15 lbs but running a consistent load of 14 lbs in 4th gear
-Forge BOV
That is really about all for right now although I have downloaded the T5 Suite and am in the process of trying to learn it as it seems very user friendly and similar to AEM which I am running on the Supra. Although my Supra is a build that I have been in the process of for 3 years now and have yet to complete however it is very close to completion now. It was one of those that I went all in on and did it all the way to the max from the get go. Full Race exhaust manifold, Carrillo H-Beam rods, Ferrea 1mm oversized valves etc. So I have not had any experiences of blowing out any check valves on it as of yet. Although I do have my fingers crossed LOL

! Either way I look forward to hearing back from ya.
-Chad

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GenuineSaab

· #7 · Aug 23, 2010

We run the new style factory valves on all the big cars here. They hold fine. The drag car sees over 32psi with my red car on kill it was up there too. On the original in the viggen. Maybe the aftermarket are not the same. The new ones are white plastic and about 20mm diameter.

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chadporsche997

Discussion Starter · #8 · Aug 25, 2010 (Edited)

GenuineSaab said:
We run the new style factory valves on all the big cars here. They hold fine. The drag car sees over 32psi with my red car on kill it was up there too. On the original in the viggen. Maybe the aftermarket are not the same. The new ones are white plastic and about 20mm diameter.

Hey Nick,
Thanks for the input as I would definitely throw this on the car with confidence! Are you referring to this check valve?
http://www.eeuroparts.com/Main/PartDetail.aspx?id=7521313A
If so will this work for the vacuum line off the top of the TB to the solenoid on the firewall? Once again I thank you for your input and look forward to hearing back from you!
-Chad

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