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Vacuum Check Valve Question

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Old 03-01-03, 01:01 PM
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HDP
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Vacuum Check Valve Question

I'm speaking of the round one-way check valves near the top vacuum chamber, but I guess all check valves in general. To check to see if they are working properly you should be able to blow in one end but not the other, but how fast should the air flow out of it? Should the valve make a whistling sound? Thanks in advance.
Old 03-02-03, 06:29 AM
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Anyone?
Old 03-02-03, 08:57 AM
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Re: Vacuum Check Valve Question

Originally posted by HDP
I'm speaking of the round one-way check valves near the top vacuum chamber, but I guess all check valves in general. To check to see if they are working properly you should be able to blow in one end but not the other, but how fast should the air flow out of it? Should the valve make a whistling sound? Thanks in advance.
You should only be able to blow through it "one" direction. However, you should be able to "suck" through it the other direction.

If you can blow through it both directions, replace it.
Old 03-02-03, 09:19 AM
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Don,

When are you going to make it over this way again?
A good site with great turbo info is Derek's site...
http://www.autosportracetech.com/RX-7/rx7stuff.htm

Tim
Old 03-02-03, 11:41 PM
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some have a filter thing and are hard to blow through with your mouth.
Old 03-03-03, 04:10 AM
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Re: Re: Vacuum Check Valve Question

Originally posted by Mahjik
You should only be able to blow through it "one" direction. However, you should be able to "suck" through it the other direction.

If you can blow through it both directions, replace it.

Thanks for telling me EXACTLY what I already know
Old 03-03-03, 04:17 AM
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Originally posted by Tim Benton
Don,

When are you going to make it over this way again?
A good site with great turbo info is Derek's site...
http://www.autosportracetech.com/RX-7/rx7stuff.htm

Tim
I'm shooting for the weekend of March 22. I hope by then, to have the 7 back together and running "properly". Right now I'm in the process of doing the vacuum hoses and replacing the downpipe. I plan to send it off this week to have it coated, so I hope to in stall it next weekend. I just hope there's good weather for the next couple of weekends.
Old 03-03-03, 12:31 PM
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as for how fast air traveles through the check valve, I couldn't give you an exact value. BUT what you could do is grab another one like it (there are two kinds: Green/Black & Green/White) and blow through both of them and see if they flow the same...If they do then I believe you are golden.

I would have to say the flow is about : weeeeeeeeiiiishhhhh! NOT Wooooooosh!, Woooooosh is about the sound of a torn/broken y-pipe coupler
Old 03-10-03, 05:11 PM
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I found an aluminum check valve. It flows air both directions. Is this correct? I didn't see a check valve like this on the parts list. Can anyone help me on this?
Old 03-10-03, 05:55 PM
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I found a pic of the aluminum check valve, but this #@%* message board won't let me upload it.
Old 03-10-03, 06:11 PM
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Originally posted by HDP
I found an aluminum check valve. It flows air both directions. Is this correct? I didn't see a check valve like this on the parts list. Can anyone help me on this?
If you can blow through it in both directions, it's not functioning correctly (hence the name, check valve).

Check this thread and see if it's the same part:

https://www.rx7club.com/forum/showth...threadid=88176

BTW, I believe attactments are disabled currently.
Old 03-10-03, 06:13 PM
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Hiram--I've got both of the stock CRV's, if you need them. $12 each, shipped. I'm leaving for a business trip on thursday, so let me know before then.

-BN
Old 03-12-03, 08:48 AM
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Originally posted by Mahjik
If you can blow through it in both directions, it's not functioning correctly (hence the name, check valve).

Check this thread and see if it's the same part:

https://www.rx7club.com/forum/showth...threadid=88176

BTW, I believe attactments are disabled currently.
Is there a thread that has details and the color of each check valve? There's no detail of this on the vacuum hose diagram.
Old 03-12-03, 08:53 AM
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hey guys...mine does the same. Just curious, can you replace the aluminum check valve with one of the other one's to eliminate that small hose>big hose>small hose. I can explain more if you like. I was down at pettit racing and cameron gave me some off a corvette. they are the same size and work GREAT!!! plus they're like 3 times cheaper
Old 03-12-03, 12:21 PM
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Originally posted by xstacy7
I can explain more if you like.
Please do. Anything to save a little $$
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