my suggestion for check valve replacements

 
 
 
 
Old 12-18-02, 06:38 PM
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Thumbs up my suggestion for check valve replacements

From McMastercarr, these are pretty heavy duty, viton seals so they can take temps up to 400° F.

• Maximum Pressure: 1000 psi
• Cracking Pressure: 0.3 psi
• Maximum Temperature: Viton: 400° F

- Brass Spring-Loaded $8.86 EA
Poppet Check Valve 1/8" Male X
Male Nptf Dryseal Thrds, Viton O-Ring
Part number: 7775K61

http://www.mcmaster.com/cgi/enter.cgi?partnum=7775k61


I ordered 5 of these along with a pack of brass nipples to make a complete new check valve set, nice to instal while doing the hose job.

- Brass Hose Nipple, 1/8" Hose Id, 1/8" Female Nptf (dryseal) Threads - pack of 10
Part number: 5346K81

http://www.mcmaster.com/cgi/enter.cgi?partnum=5346K81
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Old 12-19-02, 02:08 PM
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a picture of the check valves

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Old 12-19-02, 02:17 PM
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YAHOO!! Starting to look like a Kenworth under there. Maybe the Shuttle??

Cool sheet mon. Now my post whoring *** says adieu...
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Old 12-19-02, 02:20 PM
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:-) thanks, yeah ...they might be overkill, but I don't want to ever deal with a wack check valve again :-)
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Old 12-19-02, 02:24 PM
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Holy @$#@! Now that's what I call hard core. And to think Mazda charges $35 for the plastic OEM ones.....
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Old 12-19-02, 02:25 PM
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Hey, good idea for a post man. I replaced a check valve a couple months ago, but I got a lighter level of utility for it. Viton diaphram and all. It was this skinny little clear plastic one but it had the highest heat and cold tolerances and good pressure capability. I'm looking to replace the hole arrangement of them over winter when I do my hose job. I love the idea of using indestructable overkill parts.
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Old 12-19-02, 02:38 PM
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I've heard of people using metal check valves from gas RC aircraft engines. Like the one's here - http://www2.towerhobbies.com/cgi-bin...ve&FVPROFIL=++
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Old 12-19-02, 02:46 PM
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hey JR, I purchased some of the Perry Check Valves a while back and didn't like the way they worked out, they are smaller than you think and even though they look cool, they don't fit on the hose very well becasue the barbs are so small.

not to mention that our cars generate much stronger vacuum/pressure forces than RC aircraft and they don't list the max pressure they can take, so its a gamble that they will hold up, especially if you are running higher boost levels

Last edited by damian; 12-19-02 at 02:49 PM.
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Old 12-19-02, 02:58 PM
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Looks like a great idea for long-term performance and a cost savings to boot. When will you have them installed so that you can give us a report on how well they work?

Also, since these are so much larger/heavier than OEM’s are you planning to 'mount' them in some way to keep them from moving around; cable ties or???
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Old 12-19-02, 03:07 PM
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FDJunkie, my car is in storage until winter is over (i am in MN) so in might be a while before I can really test them. However, I will have them installed soon and if there is no snow on the ground will be 'test' driving around, but not pushing hard (too cold and on storage insurace)

Aslo, I do plan on mounting them somehow (zipties, whatever) so that they don't 'clank' around in there.
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Old 12-19-02, 04:25 PM
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Hey damian I love the intro to your site; very slick. It being a montego blue doesn't hurt either

When you going to have the rest finished?
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Old 12-19-02, 05:21 PM
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thanks DamonB, I appreciate it

I work on it when i have free time and I will try to get it finished over winter
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